1. Teco Servo Model Jsma Pmb10 Abk Dimensions List
2. Teco Servo Model Jsma Pmb10 Abk Dimensions Guide

Featuring:Accurpress Hyd. IDENTIFICATION: All participants are required to register prior to becoming an Approved Bidder. All Participants are required to give full name; permanent street address (P.O. Boxes will NOT be accepted or approved); phone number(s); email address, valid credit card and business name.Subsequent to registration on BidSpotter, approval to bid is at our discretion.2. DEPOSITS: All Online Registrants will be required to submit the requested Information, including: Drivers License Number and valid credit card in order to be Approved.

TECO servo motor 750W JSMA-LC08ABK01+JSDA-20A. TECO servo motor: Power: 100W-3KW. Motor frame size: 46x46mm to 200x200mm. Voltage:100v 200v 220V 460V 500V. US2:52PM8ABK New and Used available. Tested and 2-Year Warranty. Ask us about US2:52PM8ABK Repairs. Worldwide Shipping available. US2:52PM8ABK - IEC Control.

NO EXCEPTIONS.INTERNATIONAL BUYERS must submit a refundable deposit of $5000 to be approved to bid, or have arrangements made with our office to be?Approved? PAYMENT: Invoices must be paid in full after Sale unless otherwise specified. A BUYER`S PREMIUM OF 15% WILL BE APPLIED TO INVOICE IN ADDITION TO THE SALES PRICE.Where required by law, ANY APPLICABLE SALES TAX WILL BE APPLIED TO ALL SALES UNLESS BUYER HAS PROPER EXEMPTION. Business and Personal checks may not be accepted without a letter of verification from your bank.NO MERCHANDISE WILL BE RELEASED UNTIL INVOICE IS FULLY PAID.4.

MANNER OF PAYMENT: Invoices will be emailed within 24 hours of the auction end date. If you are the successful bidder, your credit card will be charged as follows: for amounts less than $5000 the entire balance is due immediately; for amounts greater than $5000-a 25% deposit is due immediately and the remaining balance is due within 48 hours either by Cash, Check, Visa, Master Card, Discover or Payment may be made in the form of cash, Check with Bank Letter of Guarantee, Visa, Master Card, or Discover.The full purchase price on all lots sold to the same buyer must be paid within the time specified and prior to the removal of any goods. All checks for deposit and balances due shall be payable to the order of Thompson Auctioneers, Inc.5. REMOVAL: All purchases MUST be removed as herein listed: Small Items (Perishable Tools, Machine Parts & Accessories, Etc.) are to be REMOVED WITHIN 2 DAYS OF THE AUCTION. WE ASSUME NO RESPONSIBILITY FOR SMALL, CARRIABLE ITEMS LEFT ON PREMISES ONE DAY AFTER SALE. Standard Items (Machinery & Equipment) must be removed during announced removal period.6. Purchases may be removed only on presentation of paid bill.

Removal shall be at the expense, risk and liability of the purchaser. Auctioneer shall not be responsible for goods not removed within the time allowed.7. CONDITION OF ARTICLESSOLD: Neither the auctioneer nor the seller shall be responsible for the correct description, genuineness, authenticity of, or defect in any lot., Information was has been provided from sources deem reliable and Thompson Auction Company makes no warranty or guarantee as to the accuracy of the information herein contained. No sale shall be set aside nor allowance made on account of any incorrectness, error in cataloging, or any imperfection not noted. DESCRIPTIONS AND PHOTO?S ARE NOT GUARANTEED. PLEASE MAKE YOURSELF AVAILABLE FOR THE OPEN INSPECTION PERIOD. It is the buyer?s responsibility to inspect before bidding.TO AVOID CONFUSION, PARTICIPANTS ARE BIDDING ON ITEMS LISTED IN THE LOT DESCRIPTIONS AND NOT ALL ITEMS SHOWN IN THE PHOTOGRAPHS. NO DEDUCTION ALLOWED ON DAMAGED ARTICLES, ALL ARTICLES BEING EXPOSED FORPUBLIC EXHIBITION, AND SOLD 'AS IS' AND WITHOUT RECOURSE. ARTICLES ARE NOT WARRANTED AS MERCHANTABLE OR FIT FOR ANY PARTICULAR PURPOSE, AND NO CLAIM MAY BE MADE BY PURCHASER RELATING TO THE CONDITION OR USE OF ARTICLES PURCHASED OR FOR PROXIMATE OR CONSEQUENTIAL DAMAGES ARISING THEREFROM.8. SAFETY DEVICES:Articles purchased may not incorporate approved activating mechanisms, operating safety devices or safety guards, as required by OSHA or otherwise. It is purchaser`s responsibility that articles purchased be so equipped and safeguarded to meet OSHA and any other requirements before placing such articles into operation.9.

INDEMNIFICATION:Purchaser shall defend and indemnify and hold auctioneer and seller harmless from and against all claims and liabilities relating to the condition of, removal of, or use of the articles purchased or failure of user to follow instructions, warnings or recommendations of the manufacturer, or to comply with federal, state, and local laws applicable to such articles, including OSHA requirements, and Environmental Protection Agency requirements, or for proximate or consequential damages, costs or legal expenses arising there from.10. CLAIMS: NO CLAIMS WILL BE ALLOWED AFTER REMOVAL OF GOODS FROM PREMISES OR LEFT ON PREMISES PAST ALLOWED TIME LIMIT.11. RESPONSIBILITY FOR NON-DELIVERY: Neither the auctioneer nor the seller, in any event, shall be liable for non-delivery or for any other matter or thing, to any purchaser of any lot, other than for the return to the purchaser of the deposit or sum paid on said lot, should the purchaser be entitled hereto.12. COMPLIANCE WITH TERMS OF SALE: In default of payment of bills in full within the time therein specified, the auctioneer in addition to all other remedies allowed by law, may retain all monies received as deposit or otherwise, as liquidated damages. Lots not paid for and removed within the time allowed herein may be resold at public or private sale without further notice, and any deficiency, together with all expenses and charges of resale including legal fees, will be charged to the defaulting purchaser.13. RISK TO PERSON AND PROPERTY: Persons attending during exhibition, sale or removal of goods assume all risks of damage of or loss to person and property and specifically release the auctioneer and seller from liability therefore.

Neither the auctioneer nor his principal shall be liable by reason of any defect in or condition of the premises on which the sale is held.14. CONTRACT MOVERS: If purchaser wishes to hire or contract with a machinery mover, rigger or other type of outside contractor, PROPER INSURANCE protecting Thompson Auctioneers, Inc and the people or company that the auctioneers are conducting the sale for against any or all claims arising from personal injury and/or property damage created by their actions.

This requirement is for the auctioneer`s protection - NOT FOR THE PURCHASER`S therefore the auctioneer suggests that the purchaser review the insurance policies of the machinery mover regarding the coverage that they have protecting the purchaser and damage or loss of the equipment they may be moving for the purchaser.15. ADDITION TO OR WITHDRAWAL FROM SALE: The auctioneer reserves the right to withdraw from sale any of the property listed or to sell at this sale property not listed, and also reserves the right to group one or more lots into one or more selling lots or to subdivide into two or more selling lots. Whenever the best interest of the seller willbe served, the auctioneer reserves the right to sell all the property listed, in bulk.16. DISPUTE BETWEEN BIDDERS: The auctioneer`s decision will be final and absolute.17. RECORDS: The record of sale kept by the auctioneer and bookkeeper will be taken as final in the event of any dispute.18. INDEPENDENT CONTRACTOR: The auctioneer is acting as an independent contractor only and is not responsible for the acts of its principals or sellers.19.

ADDITIONAL TERMS AND CONDITIONS: The auctioneer may add other terms and conditions of sale, such additional terms and conditions to be announced prior to the auction.20. RESERVE: The auctioneer reserves the right to reject any and all bids. On lots upon which there is a reserve, the auctioneer or his assigned agents, shall have the right to bid on behalf of the seller. Featuring:Accurpress Hyd. IDENTIFICATION: All participants are required to register prior to becoming an Approved Bidder. All Participants are required to give full name; permanent street address (P.O.

Boxes will NOT be accepted or approved); phone number(s); email address, valid credit card and business name.Subsequent to registration on BidSpotter, approval to bid is at our discretion.2. DEPOSITS: All Online Registrants will be required to submit the requested Information, including: Drivers License Number and valid credit card in order to be Approved. NO EXCEPTIONS.INTERNATIONAL BUYERS must submit a refundable deposit of $5000 to be approved to bid, or have arrangements made with our office to be?Approved? PAYMENT: Invoices must be paid in full after Sale unless otherwise specified. A BUYER`S PREMIUM OF 15% WILL BE APPLIED TO INVOICE IN ADDITION TO THE SALES PRICE.Where required by law, ANY APPLICABLE SALES TAX WILL BE APPLIED TO ALL SALES UNLESS BUYER HAS PROPER EXEMPTION. Business and Personal checks may not be accepted without a letter of verification from your bank.NO MERCHANDISE WILL BE RELEASED UNTIL INVOICE IS FULLY PAID.4. MANNER OF PAYMENT: Invoices will be emailed within 24 hours of the auction end date.

If you are the successful bidder, your credit card will be charged as follows: for amounts less than $5000 the entire balance is due immediately; for amounts greater than $5000-a 25% deposit is due immediately and the remaining balance is due within 48 hours either by Cash, Check, Visa, Master Card, Discover or Payment may be made in the form of cash, Check with Bank Letter of Guarantee, Visa, Master Card, or Discover.The full purchase price on all lots sold to the same buyer must be paid within the time specified and prior to the removal of any goods. All checks for deposit and balances due shall be payable to the order of Thompson Auctioneers, Inc.5. REMOVAL: All purchases MUST be removed as herein listed: Small Items (Perishable Tools, Machine Parts & Accessories, Etc.) are to be REMOVED WITHIN 2 DAYS OF THE AUCTION. WE ASSUME NO RESPONSIBILITY FOR SMALL, CARRIABLE ITEMS LEFT ON PREMISES ONE DAY AFTER SALE. Standard Items (Machinery & Equipment) must be removed during announced removal period.6. Purchases may be removed only on presentation of paid bill.

Removal shall be at the expense, risk and liability of the purchaser. Auctioneer shall not be responsible for goods not removed within the time allowed.7. CONDITION OF ARTICLESSOLD: Neither the auctioneer nor the seller shall be responsible for the correct description, genuineness, authenticity of, or defect in any lot., Information was has been provided from sources deem reliable and Thompson Auction Company makes no warranty or guarantee as to the accuracy of the information herein contained. No sale shall be set aside nor allowance made on account of any incorrectness, error in cataloging, or any imperfection not noted. DESCRIPTIONS AND PHOTO?S ARE NOT GUARANTEED.

PLEASE MAKE YOURSELF AVAILABLE FOR THE OPEN INSPECTION PERIOD. It is the buyer?s responsibility to inspect before bidding.TO AVOID CONFUSION, PARTICIPANTS ARE BIDDING ON ITEMS LISTED IN THE LOT DESCRIPTIONS AND NOT ALL ITEMS SHOWN IN THE PHOTOGRAPHS. NO DEDUCTION ALLOWED ON DAMAGED ARTICLES, ALL ARTICLES BEING EXPOSED FORPUBLIC EXHIBITION, AND SOLD 'AS IS' AND WITHOUT RECOURSE. ARTICLES ARE NOT WARRANTED AS MERCHANTABLE OR FIT FOR ANY PARTICULAR PURPOSE, AND NO CLAIM MAY BE MADE BY PURCHASER RELATING TO THE CONDITION OR USE OF ARTICLES PURCHASED OR FOR PROXIMATE OR CONSEQUENTIAL DAMAGES ARISING THEREFROM.8. SAFETY DEVICES:Articles purchased may not incorporate approved activating mechanisms, operating safety devices or safety guards, as required by OSHA or otherwise.

It is purchaser`s responsibility that articles purchased be so equipped and safeguarded to meet OSHA and any other requirements before placing such articles into operation.9. INDEMNIFICATION:Purchaser shall defend and indemnify and hold auctioneer and seller harmless from and against all claims and liabilities relating to the condition of, removal of, or use of the articles purchased or failure of user to follow instructions, warnings or recommendations of the manufacturer, or to comply with federal, state, and local laws applicable to such articles, including OSHA requirements, and Environmental Protection Agency requirements, or for proximate or consequential damages, costs or legal expenses arising there from.10. CLAIMS: NO CLAIMS WILL BE ALLOWED AFTER REMOVAL OF GOODS FROM PREMISES OR LEFT ON PREMISES PAST ALLOWED TIME LIMIT.11. RESPONSIBILITY FOR NON-DELIVERY: Neither the auctioneer nor the seller, in any event, shall be liable for non-delivery or for any other matter or thing, to any purchaser of any lot, other than for the return to the purchaser of the deposit or sum paid on said lot, should the purchaser be entitled hereto.12. COMPLIANCE WITH TERMS OF SALE: In default of payment of bills in full within the time therein specified, the auctioneer in addition to all other remedies allowed by law, may retain all monies received as deposit or otherwise, as liquidated damages. Lots not paid for and removed within the time allowed herein may be resold at public or private sale without further notice, and any deficiency, together with all expenses and charges of resale including legal fees, will be charged to the defaulting purchaser.13.

RISK TO PERSON AND PROPERTY: Persons attending during exhibition, sale or removal of goods assume all risks of damage of or loss to person and property and specifically release the auctioneer and seller from liability therefore. Neither the auctioneer nor his principal shall be liable by reason of any defect in or condition of the premises on which the sale is held.14. CONTRACT MOVERS: If purchaser wishes to hire or contract with a machinery mover, rigger or other type of outside contractor, PROPER INSURANCE protecting Thompson Auctioneers, Inc and the people or company that the auctioneers are conducting the sale for against any or all claims arising from personal injury and/or property damage created by their actions. This requirement is for the auctioneer`s protection - NOT FOR THE PURCHASER`S therefore the auctioneer suggests that the purchaser review the insurance policies of the machinery mover regarding the coverage that they have protecting the purchaser and damage or loss of the equipment they may be moving for the purchaser.15. ADDITION TO OR WITHDRAWAL FROM SALE: The auctioneer reserves the right to withdraw from sale any of the property listed or to sell at this sale property not listed, and also reserves the right to group one or more lots into one or more selling lots or to subdivide into two or more selling lots. Whenever the best interest of the seller willbe served, the auctioneer reserves the right to sell all the property listed, in bulk.16.

DISPUTE BETWEEN BIDDERS: The auctioneer`s decision will be final and absolute.17. RECORDS: The record of sale kept by the auctioneer and bookkeeper will be taken as final in the event of any dispute.18. INDEPENDENT CONTRACTOR: The auctioneer is acting as an independent contractor only and is not responsible for the acts of its principals or sellers.19. ADDITIONAL TERMS AND CONDITIONS: The auctioneer may add other terms and conditions of sale, such additional terms and conditions to be announced prior to the auction.20. RESERVE: The auctioneer reserves the right to reject any and all bids. On lots upon which there is a reserve, the auctioneer or his assigned agents, shall have the right to bid on behalf of the seller.

R.1973-01-01The development policy for thermionic reactors to provide electric propulsion and power for space exploration was analyzed to develop a logical procedure for selecting development alternatives that reflect the technical feasibility, JPL/NASA project objectives, and the economic environment of the project. The partial evolution of a decision model from the underlying philosophy of decision analysis to a deterministic pilot phase is presented, and the general manner in which this decision model can be employed to examine propulsion development alternatives is illustrated.Huffman, F. N.; Lieb, D.; Briere, T. R.; Sommer, A.

H.; Rufeh, F.1976-01-01Recent progress at Thermo Electron in developing advanced thermionic converters is summarized with particular attention paid to the development of electrodes, diodes, and triodes. It is found that one class of materials (ZnO, BaO and SrO) provides interesting cesiated work functions (1.3-1.4 eV) without additional oxygen. The second class of materials studied (rare earth oxides and hexaborides) gives cesiated/oxygenated work functions of less than 1.2 eV. Five techniques of oxygen addition to thermionic converters are discussed.

Vapor deposited tungsten oxide collector diodes and the reflux converter are considered.Homeyer, W. G.; Merrill, M. H.; Holland, J. W.; Fisher, C. R.; Allen, D. T.1985-01-01Thermionic reactor designs for a variety of space power applications spanning the range from 5 kWe to 3 MWe are described.

In all of these reactors, nuclear heat is converted directly to electrical energy in thermionic fuel elements (TFEs). A circulating reactor coolant carries heat from the core of TFEs directly to a heat rejection radiator system. The recent design of a thermionic reactor to meet the SP-100 requirements is emphasized.

Design studies of reactors at other power levels show that the same TFE can be used over a broad range in power, and that design modifications can extend the range to many megawatts. The design of the SP-100 TFE is similar to that of TFEs operated successfully in test reactors, but with design improvements to extend the operating lifetime to seven years.Rasor, N.S.; Hirsch, R.L.1963-12-01The patent relates to the direct conversion of fission heat to electricity by use of thermionic plasma diodes having fissionable material cathodes, said diodes arranged to form a critical mass in a nuclear reactor.

The patent describes a fuel element comprising a plurality of diodes each having a fissionable material cathode, an anode around said cathode, and an ionizable gas therebetween. Provision is made for flowing the gas and current serially through the diodes. (AEC).Mondt, J. F.; Sawyer, C. D.; Nakashima, A.1972-01-01A nuclear thermionic reactor as the electric power source for an electric propulsion spacecraft introduces a nuclear radiation environment that affects the spacecraft configuration, the use and location of electrical insulators and the science experiments.

The spacecraft is conceptually configured to minimize the nuclear shield weight by: (1) a large length to diameter spacecraft; (2) eliminating piping penetrations through the shield; and (3) using the mercury propellant as gamma shield. Since the alumina material is damaged by the high nuclear radiation environment in the reactor it is desirable to locate the alumina insulator outside the reflector or develop a more radiation resistant insulator.Barrus, Donald M.; Shires, Charles D.; Brummond, William A.1989-01-01A self-actuating reactor shutdown system incorporating a thermionic switched electromagnetic latch arrangement which is responsive to reactor neutron flux changes and to reactor coolant temperature changes. The system is self-actuating in that the sensing thermionic device acts directly to release (scram) the control rod (absorber) without reference or signal from the main reactor plant protective and control systems. To be responsive to both temperature and neutron flux effects, two detectors are used, one responsive to reactor coolant temperatures, and the other responsive to reactor neutron flux increase.

The detectors are incorporated into a thermionic diode connected electrically with an electromagnetic mechanism which under normal reactor operating conditions holds the the control rod in its ready position (exterior of the reactor core). Upon reaching either a specified temperature or neutron flux, the thermionic diode functions to short-circuit the electromagnetic mechanism causing same to lose its holding power and release the control rod, which drops into the reactor core region under gravitational force.Jacobsen, A.

S.; Tasca, D. M.1971-01-01Consideration of the effects of various thermionic reactor parameters and requirements upon spacecraft power conditioning design. A basic spacecraft is defined using nuclear electric propulsion, requiring approximately 120 kWe. The interrelationships of reactor operating characteristics and power conditioning requirements are discussed and evaluated, and the effects on power conditioner design and performance are presented.Determan, William R.; Van Hagan, Tom H.1993-01-01A 5- to 40-kWe moderated in-core thermionic space nuclear power system (TI-SNPS) concept was developed to address the TI-SNPS program requirements. The 40-kWe baseline design uses multicell Thermionic Fuel Elements (TFEs) in a zirconium hydride moderated reactor to achieve a specific mass of 18.2 We/kg and a net end-of-mission (EOM) efficiency of 8.2%. The reactor is cooled with a single NaK-78 pumped loop, which rejects the heat through a 24 m2 heat pipe space radiator.Ponomarev-Stepnoi, N.

N.; Kompaniets, G. V.; Poliakov, D.

N.; Stepennov, B. S.; Andreev, P. V.; Zhabotinsky, E. E.; Nikolaev, Yu. V.; Lapochkin, N.

V.2001-02-01Today Russian experts have technological experience in development of in-core thermionic converters for reactors of space nuclear power plants. Such a converter contains nuclear fuel inside and really represents a fuel element of a reactor. Two types of reactors can be considered on the basis of these thermionic fuel elements: with thermal or intermediate neutron spectrum, and with fast neutron spectrum. The first type is characterized by the presence of moderator in core that ensures most economical usage of nuclear fuel. The estimation shows that moderated system is the most effective in the power range of about 5. The power systems of higher level are characterized by larger dimensions due to the presence of moderator.

The second type of reactor is considered for higher power levels. This power range is about hundreds kWe. Dimensions of the fast reactor and core configuration are determined by the necessity to ensure the required net output power, on the one hand, and the necessity to ensure critical state on the other hand. In the case of using in-core thermionic fuel elements of the specified design, minimal reactor output power is determined by reactor criticality condition, and maximum reactor power output is determined by specifications and launcher capabilities. In the present paper the effective multiplication factor of a fast spectrum reactor on the basis of a multi-cell TFE developed by ``Lutch' is considered a function of the total number of TFEs in the reactor. The MCU Monte-Carlo code, developed in Russia (Alekseev, et al., 1991), was used for computations.

TFE computational models are placed in the nodes of a uniform triangular lattice and surrounded with pressure vessel and a side reflector. Ordinary fuel pins without thermionic converters were used instead of some TFEs to optimize criticality parameters, dimensions and output power of the reactor. General weight parameters of the reactor are presented in the paper.Morris, D.

Brent; Standley, Vaughn H.; Schuller, Michael J.1992-01-01The arrival of a Soviet TOPAZ-II space nuclear reactor affords the US space nuclear power (SNP) community the opportunity to study an assembled thermionic conversion power system. The TOPAZ-II will be studied via the Thermionic System Evaluation Test (TSET) Project. This paper is devoted to the discussion of TSET test development as related to the objectives contained in the TSET Project Plan (Standley et al.

The objectives contained in the Project Plan are the foundation for scheduled TSET tests on TOPAZ-II and are derived from the needs of the Air Force Thermionic SNP program. Our ability to meet the objectives is bounded by unique constraints, such as procurement requirements, operational limitations, and necessary interaction between US and Soviet Scientists and engineers. The fulfillment of the test objectives involves a thorough methodology of test scheduling and data managment. The overall goals for the TSET program are gaining technical understanding of a thermionic SNP system and demonstrating the capabilities and limitations of such a system while assisting in the training of US scientist and engineers in preparation for US SNP system testing.

Tests presently scheduled as part of TSET include setup, demonstration, and verification tests; normal and off-normal operating test, and system and component performance tests.Fisher, C.R.; Perry, L.W. Jr.1975-11-01A Thermionic Nuclear Reactor is described having multiple ribbon-like coolant ducts passing through the core, intertwined among the thermionic fuel elements to provide independent cooling paths. Heat pipes are disposed in the core between and adjacent to the thermionic fuel elements and the ribbon ducting, for the purpose of more uniformly distributing the heat of fission among the thermionic fuel elements and the ducts.Mayo, W.; Lantz, E.1973-01-01A procedure is developed and used to calculate the detailed power distribution in the fuel elements next to a beryllium oxide reflector of a fast-spectrum, thermionic reactor.

The results of the calculations show that, although the average power density in these outer fuel elements is not far from the core average, the power density at the very edge of the fuel closest to the beryllium oxide is about 1.8 times the core avearge.Haley, F. A.1972-01-01A preliminary plan is presented for testing a thermionic reactor in the Plum Brook Space Power Facility (SPF). A technical approach, cost estimate, manpower estimate, and schedule are presented to cover a 2 year full power reactor test.Chiu, H. T.; Manikopulos, C.

H.1977-01-01This work reports ion generation in a cesium thermionic converter as part of advanced-model thermionic converter development research. A microwave with frequency in the range between 1-2 GHz is used to externally pump a thermionic converter as part of our effort in the verification of Lam's theory. It is found that the motive peak as predicted in the theory disappears whenever microwave power is used to excite the cesium plasma of the converter.

The electron temperature is effectively heated by the microwave and the experimental data agrees with theory in the low-power output region.Mason, Lee S.; Schmitz, Paul C.; Gallup, Donald R.1991-01-01This paper presents a conceptual design of a lunar in-core thermionic reactor power system. The concept consists of a thermionic reactor located in a lunar excavation with surface mounted waste heat radiators. The system was integrated with a proposed lunar base concept representative of recent NASA Space Exploration Initiative studies. The reference mission is a permanently-inhabited lunar base requiring a 550 kWe, 7 year life central power station.

Performance parameters and assumptions were based on the Thermionic Fuel Element (TFE) Verification Program. Five design cases were analyzed ranging from conservative to advanced. The cases were selected to provide sensitivity effects on the achievement of TFE program goals.Van Hagan, Thomas H.; Drees, Elizabeth A.1993-01-01Technical aspects of the thermionic fuel element (TFE) design proposed for the S-PRIME space nuclear power system are discussed. Topics covered include the rational for selecting a multicell TFE approach, a technical description of the S-PRIME TFE and its estimated performance, and the technology readiness of the design, which emphasizes techology maturity and low risk.Baez, Anastacio N.1998-01-01A spacecraft solar, bimodal system combines propulsion and power generation into a single integrated system. An Integrated Solar Upper Stage (ISUS) provides orbital transfer capabilities, power generation for payloads, and onboard propulsion to the spacecraft. A key benefit of a bimodal system is a greater payload-to-spacecraft mass ratio resulting in lower launch vehicle requirements. Scaling down to smaller launch vehicles increases space access by reducing overall mission cost.

NASA has joined efforts with the Air Force Phillips Laboratory to develop enabling technologies for such a system. The NASA/Air Force bimodal concept uses solar concentrators to focus energy into an integrated power plant.

This power plant consists of a graphite core that stores thermal energy within a cavity. An array of thermionic converters encircles the graphite cavity and provides electrical energy conversion functions. During the power generation phase of the bimodal system, the thermionic converters are exposed to the heated cavity and convert the thermal energy to electricity. Near-term efforts of the ISUS bimodal program are focused on a ground demonstration of key technologies in order to proceed to a full space flight test. Thermionic power generation is one key technology of the bimodal concept.

Thermionic power converters impose unique operating requirements upon a power management and distribution (PMAD) system design. Single thermionic converters supply large currents at very low voltages. Operating voltages can vary over a range of up to 3 to 1 as a function of operating temperature. Most spacecraft loads require regulated 28-volts direct-current (Vdc) power.

A combination of series-connected converters and powerprocessing boosters is required to deliver power to the spacecraft's payloads at this level.Salmi, E. W.1972-01-01Most thermionic reactors are designed to allow the fission gases to escape out of the emitter.

A scheme to allow the fission gases to escape is proposed. Because of the low activity of the fission products, this method should pose no radiation hazards.Niederauer, G.; Lantz, E.; Breitweiser, R.1971-01-01Description of the concept of splitting a heat-pipe reactor for out-of-core thermionics into two identical halves and using the resulting center gap for reactivity control. Short Li-W reactor heat pipes penetrate the axial reflectors and form a heat exchanger with long heat pipes which wind through the shield to the thermionic diodes. With one reactor half anchored to the shield, the other is attached to a long arm with a pivot behind the shield and swings through a small arc for reactivity control. A safety shim prevents large reactivity inputs, and a fueled control arm drive shaft acts as a power stabilizer. Reactors fueled with U-235C and with U-233C have been studied.-.1991-01-01The design and development is examined of a small excore heat pipe thermionic space nuclear reactor power system (SEHPTR).

The need was identified for an in-space flight demonstration of a solar powered, thermionic heat pipe element. A demonstration would examine its performance and verify its operation in microgravity.

The design of a microsatellite based technology demonstration experiment is proposed to measure the effects of microgravity on the performance of an integrated thermionic heat pipe device in low earth orbit. The specific objectives are to verify the operation of the liquid metal heat pipe and the cesium reservior in the space environment.

Two design configurations are described; THERMION-I and THERMION-II. THERMION-I is designed for a long lifetime study of the operations of the thermionic heat pipe element in low earth orbit.

Heat input to the element is furnished by a large mirror which collects solar energy and focuses it into a cavity containing the heat pipe device. THERMION-II is a much simpler device which is used for short term operation. This experiment remains attached to the Delta II second stage and uses energy from 500 lb of alkaline batteries to supply heat energy to the heat pipe device. N.; Sommer, A. H.; Balestra, C. L.; Briere, T. R.; Lieb, D.; Oettinger, P.

E.; Goodale, D. B.1977-01-01Research in thermionic energy conversion technology is reported. The objectives were to produce converters suitable for use in out of core space reactors, radioisotope generators, and solar satellites. The development of emitter electrodes that operate at low cesium pressure, stable low work function collector electrodes, and more efficient means of space charge neutralization were investigated to improve thermionic converter performance. Potential improvements in collector properties were noted with evaporated thin film barium oxide coatings. Experiments with cesium carbonate suggest this substance may provide optimum combinations of cesium and oxygen for thermionic conversion.Moriarty, M.P.1993-01-15The heat transport subsystem for a liquid metal cooled thermionic space nuclear power system was modelled using algorithms developed in support of previous nuclear power system study programs, which date back to the SNAP-10A flight system. The model was used to define the optimum dimensions of the various components in the heat transport subsystem subjected to the constraints of minimizing mass and achieving a launchable package that did not require radiator deployment.

The resulting design provides for the safe and reliable cooling of the nuclear reactor in a proven lightweight design.Moriarty, Michael P.1993-01-01The heat transport subsystem for a liquid metal cooled thermionic space nuclear power system was modelled using algorithms developed in support of previous nuclear power system study programs, which date back to the SNAP-10A flight system. The model was used to define the optimum dimensions of the various components in the heat transport subsystem subjected to the constraints of minimizing mass and achieving a launchable package that did not require radiator deployment. The resulting design provides for the safe and reliable cooling of the nuclear reactor in a proven lightweight design.Peelgren, M. L.1972-01-01The unmanned planetary exploration to be conducted in the last two decades of this century includes many higher energy missions which tax all presently available propulsion systems beyond their limit. One candidate with the versatility and performance to meet these mission objectives is nuclear electric propulsion (NEP).

Additionally, the NEP System is feasible in orbit raising operations with the Shuttle or Shuttle/Tug combination. A representative planetary mission is described (Uranus-Neptune flyby with probe), and geocentric performance and tradeoffs are discussed. The NEP System is described in more detail with particular emphasis on the power subsystem consisting of the thermionic reactor, heat rejection subsystem, and neutron shield.Hunter, R.L.; Gontar, A.S.; Nelidov, M.V.1997-01-01Work on thermionic nuclear power systems has been performed in Russia within the framework of the TOPAZ reactor program since the early 1960s. In the TOPAZ in-core thermionic convertor reactor design, the fuel element`s cladding is also the thermionic convertor`s emitter.

Deformation of the emitter can lead to short-circuiting and is the primary cause of premature TRC failure. Such deformation can be the result of fuel swelling, thermocycling, or increased unilateral pressure on the emitter due to the release of gaseous fission products. Much of the work on TRCs has concentrated on preventing or mitigating emitter deformation by improving themore » following materials and structures: nuclear fuel; emitter materials; electrical insulators; moderator and reflector materials; and gas-exhaust device. In addition, considerable effort has been directed toward the development of experimental techniques that accurately mimic operational conditions and toward the creation of analytical and numerical models that allow operational conditions and behavior to be predicted without the expense and time demands of in-pile tests. New and modified materials and structures for the cores of thermionic NPSs and new fabrication processes for the materials have ensured the possibility of creating thermionic NPSs for a wide range of powers, from tens to several hundreds of kilowatts, with life spans of 5 to 10 years.« less.Poirier, V.

L.1972-01-01Eight different types of cermet seals for thermionic diodes were investigated: (1) 1 micron Al2O3 with Nb spheres; (2) 200 A Al2O3 with Nb spheres; (3) 1 micron Al2O3 with Nb 1% Zr spheres; (4) 200 A Al2O3 with Nb 1% Zr spheres; (5) Pure Y2O3 with Nb 1% Zr spheres; (6) Y2O3 3% ZrO2 with Nb 1% Zr spheres; (7) Y2O3 10% ZrO2 with Nb 1% Zr spheres; and (8) ZrO2 12% Y2O3 with Nb 1% Zr spheres. Investigations were made to determine the most favorable fabrication techniques and the effect of the bonding cycle, (length of bonding time and shutdown sequences).

The analysis of the seals included tensile test, vacuum test, electrical test and metallurgical examination. At the conclusion of the development phase, 36 seals were fabricated for delivery for evaluation.Niederauer, G. F.1973-01-01The Thermionic Reactor Critical Experiments (TRCE) consisted of fast spectrum highly enriched U-235 cores reflected by different thicknesses of beryllium or beryllium oxide with a transition zone of stainless steel between the core and reflector. The mixed fast-thermal spectrum at the core reflector interface region poses a difficult neutron transport calculation.

Calculations of TRCE using ENDF/B fast spectrum data and GATHER library thermal spectrum data agreed within about 1 percent for the multiplication factor and within 6 to 8 percent for the power peaks. Use of GAM library fast spectrum data yielded larger deviations. The results were obtained from DOT R Theta calculations with leakage cross sections, by region and by group, extracted from DOT RZ calculations. Delineation of the power peaks required extraordinarily fine mesh size at the core reflector interface.Spera, R.

J.; Prickett, W. Z.; Garate, J. A.; Firth, W.

L.1971-01-01Mission operations are presented for comet rendezvous and outer planet exploration NEP spacecraft employing in-core thermionic reactors for electric power generation. The selected reference missions are the Comet Halley rendezvous and a Jupiter orbiter at 5.9 planet radii, the orbit of the moon Io. The characteristics of the baseline multi-mission NEP spacecraft are presented and its performance in other outer planet missions, such as Saturn and Uranus orbiters and a Neptune flyby, are discussed. Candidate mission operations are defined from spacecraft assembly to mission completion. Pre-launch operations are identified.

Shuttle launch and subsequent injection to earth escape by the Centaur D-1T are discussed, as well as power plant startup and the heliocentric mission phases. The sequence and type of operations are basically identical for all missions investigated.Morris, J. F.1972-01-01Diminiodes are fixed-or variable-gap cesium diodes with plane miniature emitters and guarded collectors. In addition to smallness, their relative advantages are simplicity, precision, ease of fabrication, interchangeability of parts, cleanliness, full instrumentation, ruggedness, and economy. With diminiodes and computers used in thermionic performance mapping, a thorough electrode screening program becomes practical.1985-01-01Thermionic energy conversion is the production of energy from a nuclear source. It is a technology advanced by SNSO, a joint research and development organization formed by NASA and the AEC. SNSO contracted with Thermo Electron Corporation to develop high temperature applications, i.e., metals with high melting points.

Thermo Electron Corporation's expertise resulted in contracts for products made from exotic metals such as bone implants, artificial hips, and heart pacemakers.Shaner, Benjamin J McMurray, PA; Wolf, Joseph H Pittsburgh, PA; Johnson, Robert G.Stamatelatos, M. G.; Barsell, A. W.; Harris, P. A.; Francisco, J.1987-01-01Presumed end-of-life atmospheric reentry of the GA SP-100 system was studied to assess dispersal feasibility and associated hazards. Reentry was studied by sequential use of an orbital trajectory and a heat analysis computer program. Two heating models were used. The first model assumed a thermal equilibrium condition between the stagnation point aerodynamic heating and the radiative cooling of the skin material surface.

The second model allowed for infinite conductivity of the skin material. Four reentering configurations were studied representing stages of increased SP-100 breakup: (1) radiator, shield and reactor, (2) shield and reactor, (3) reactor with control drums, and (4) reactor without control drums. Each reentering configuration was started from a circular orbit at 116 km having an inertial velocity near Mach 25. The assumed failing criterion was the attainment of melting temperature of a critical system component. The reentry analysis revealed breakup of the vessel in the neighborhood of 61 km altitude and scattering of the fuel elements. Subsequent breakup of the fuel elements was not predicted.

Oxidation of the niobium skin material was calculated to cause an increase in surface temperature of less than ten percent. The concept of thermite analogs for enhancing reactor reentry dispersal was assessed and found to be feasible in principle. A conservative worst-case hazards analysis was performed for radioactive and nonradioactive toxic SP-100 materials assumed to be dispersed during end-of-life reentry.

The hazards associated with this phase of the SP-100 mission were calculated to be insignificant.King, Donald B.; Sadwick, Laurence P.; Wernsman, Bernard R.2002-06-18Modules of assembled microminiature thermionic converters (MTCs) having high energy-conversion efficiencies and variable operating temperatures manufactured using MEMS manufacturing techniques including chemical vapor deposition. The MTCs incorporate cathode to anode spacing of about 1 micron or less and use cathode and anode materials having work functions ranging from about 1 eV to about 3 eV. The MTCs also exhibit maximum efficiencies of just under 30%, and thousands of the devices and modules can be fabricated at modest costs.Hu, T. J.; Qin, B.; Liu, K. Y.2018-04-01The current requirements from civil and commercial applications lead to the development of compact free-electron laser (FEL)-based terahertz (THz) radiation sources.

A picosecond electron gun plays an important role in an FEL-THz facility and attracts significant attention, as machine performance is very sensitive to initial conditions. A novel thermionic gun with an external cathode (EC) and two independently tunable cavities (ITCs) has been found to be a promising alternative to conventional electron sources due to its remarkable characteristics, and correspondingly an FEL injector can achieve a balance between a compact layout and high brightness benefitting from the velocity bunching properties and RF focusing effects in the EC-ITC gun. Nevertheless, the EC-ITC gun has not been extensively examined as part of the FEL injector in the past years. In this regard, to fill this gap, a development focusing on the experimental setup of an FEL injector based on an EC-ITC gun is described in detail. Before assembly, dynamic beam simulations were performed to investigate the optimal mounting position for the Linac associated with the focusing coils, and a suitable radio-frequency (RF) system was established based on a power coupling design and allocation.

The testing bench proved to be fully functional through basic experiments using typical diagnostic approaches for estimating primary parameters. Associated with dynamic beam calculations, a performance evaluation for an EC-ITC gun was established while providing indirect testing results for an FEL injector.English, R. E.1981-01-01The thermionic and Brayton reactor concepts were compared for application to space power. For a turbine inlet temperature of 15000 K the Brayton powerplant weighted 5 to 40% less than the thermionic concept. The out of core concept separates the thermionic converters from their reactor. Technical risks are diminished by: (1) moving the insolator out of the reactor; (2) allowing a higher thermal flux for the thermionic converters than is required of the reactor fuel; and (3) eliminating fuel swelling's threat against lifetime of the thermionic converters. Overall performance can be improved by including power processing in system optimization for design and technology on more efficient, higher temperature power processors.

The thermionic reactors will be larger than those for competitive systems with higher conversion efficiency and lower reactor operating temperatures. It is concluded that although the effect of reactor size on shield weight will be modest for unmanned spacecraft, the penalty in shield weight will be large for manned or man-tended spacecraft.Hatch, G.L.; Brummond, W.A.; Barrus, D.M.1984-04-05The present invention is directed to an improved temperature responsive thermionic gas switch utilizing a hollow cathode and a folded emitter surface area. The folded emitter surface area of the thermionic switch substantially increases the on/off ratio by changing the conduction surface area involved in the two modes thereof. The improved switch of this invention provides an on/off ratio of 450:1 compared to the 10:1 ratio of the prior known thermionic switch, while providing for adjusting the on current. In the improved switch of this invention the conduction area is made small in the off mode, while in the on mode the conduction area is made large. This is achieved by utilizing a folded hollow cathode configuration and utilizing a folded emitter surface area, and by making the dimensions of the folds small enough so that a space charge will develop in the convolutions of the folds and suppress unignited current, thus limiting the current carrying surface in the off mode.Rasor, Ned S.; Britt, Edward J.1976-01-01A gas-filled thermionic converter is provided with a collector and an emitter having a main emitter region and an auxiliary emitter region in electrical contact with the main emitter region. The main emitter region is so positioned with respect to the collector that a main gap is formed therebetween and the auxiliary emitter region is so positioned with respect to the collector that an auxiliary gap is formed therebetween partially separated from the main gap with access allowed between the gaps to allow ionizable gas in each gap to migrate therebetween.

With heat applied to the emitter the work function of the auxiliary emitter region is sufficiently greater than the work function of the collector so that an ignited discharge occurs in the auxiliary gap and the work function of the main emitter region is so related to the work function of the collector that an unignited discharge occurs in the main gap sustained by the ions generated in the auxiliary gap. A current flows through a load coupled across the emitter and collector due to the unignited discharge in the main gap.Vandersande, Jan W.; Ewell, Richard C.1992-01-01Report discusses mathematical modeling to predict performance and lifetime of spacecraft power source that is integrated combination of nuclear-fission reactor and thermionic converters. Details of nuclear reaction, thermal conditions in core, and thermionic performance combined with model of swelling of fuel.Wintucky, Edwin G.2002-01-01A power-efficient, miniature, easily manufactured, reservoir-type barium-dispenser thermionic cathode has been developed that offers the significant advantages of simultaneous high electron-emission current density (2 A/sq cm) and very long life (100,000 hr of continuous operation) when compared with the commonly used impregnated-type barium-dispenser cathodes. Important applications of this cathode are a wide variety of microwave and millimeter-wave vacuum electronic devices, where high output power and reliability (long life) are essential.

We also expect it to enable the practical development of higher purveyance electron guns for lower voltage and more reliable device operation. The low cathode heater power and reduced size and mass are expected to be particularly beneficial in traveling-wave-tube amplifiers (TWTA's) for space communications, where future NASA mission requirements include smaller onboard spacecraft systems, higher data transmission rates (high frequency and output power) and greater electrical efficiency.Chubb, D. (Inventor)1985-01-01A thermionic photovoltaic energy conversion device comprises a thermionic diode mounted within a hollow tubular photovoltaic converter.

The thermionic diode maintains a cesium discharge for producing excited atoms that emit line radiation in the wavelength region of 850 nm to 890 nm. The photovoltaic converter is a silicon or gallium arsenide photovoltaic cell having bandgap energies in this same wavelength region for optimum cell efficiency.Schock, A.; Raab, B.1971-01-01Description of an external-fuel thermionic converter which utilizes a thoriated-tungsten fuel-emitter body. Performance in out-of-pile tests was comparable to that of an arc-cast tungsten emitter body, with 400-eW output power (about 5 W/sq cm) at 10.8% efficiency. Maximum fuel clad temperature averaged from 1650 to 1700 C during the 300-hour test. This converter has been processed for in-pile testing. The various processing steps, including the installation of six emitter thermocouples, encapsulation in the secondary container, and joining to the fission-gas collection system, are described in detail.

Teco Servo Model Jsma Pmb10 Abk Dimensions List

In addition to the converter assembly, a doubly contained fission gas collection assembly with radiation-hardened differential pressure transducers was fabricated. The experiment support plate required for the in-pile test, containing electrically insulated instrumentation feedthroughs and coolant line feedthroughs to the vacuum test chamber, was also fabricated.1979-01-01Developments towards space and terrestrial applications of thermionic energy conversion are presented.White, Morgan C.1996-12-01Thermionic energy conversion is one of the many concepts which make up the direct power conversion technologies. Specifically, thermionics is the process of changing heat directly into electricity via a material`s ability to emit electrons when heated.

This thesis presents a broad overview of the engineering and physics necessary to make thermionic energy conversion (TEC) a practical reality. It begins with an introduction to the technology and the history of its development. This is followed by a discussion of the physics and engineering necessary to develop practical power systems.

Special emphasis is placed on the critical issues which are stillmore » being researched. Finally, there is a discussion of the missions which this technology may fulfill.« less.Monroe, Jr., James E.1977-08-09A thermionic device for converting nuclear energy into electrical energy comprising a tubular anode spaced from and surrounding a cylindrical cathode, the cathode having an outer emitting surface of ruthenium, and nuclear fuel on the inner cylindrical surface. The nuclear fuel is a ceramic composition of fissionable material in a metal matrix.

An axial void is provided to collect and contain fission product gases.Miskolczy, G.; Goodale, D.; Moffat, A. L.; Morgan, D. T.Since thermionic converters receive heat at very high temperatures (approximately 1800 K) and reject heat at moderately high temperatures (approximately 800 K), they are useful for cogeneration applications involving high temperature processes. The electric power from thermionic converters is produced as a high amperage, low-voltage direct current.

An ideal cogeneration application would be to utilize the reject heat at the collector temperature and the electricity without power conditioning. A cogeneration application in the edible oil industry fulfills both of these requirements since both direct heat and hydrogen gas are required in the hydrogenation of the oils. In this application, the low-voltage direct current would be used in a hydrogen electrolyzer.Gold, Steven H.; Fliflet, Arne W.2001-08-25This is the final report on the research program ' Development of a Thermionic Magnicon Amplifier at 11.4 GHz,' which was carried out by the Plasma Physics Division of the Naval Research Laboratory.

Its goal was to develop a high-power, frequency-doubling X-band magnicon amplifier, an advanced scanning-beam amplifier, for use in future linear colliders. The final design parameters were 61 MW at 11.424 GHz, 59 dB gain, 59% efficiency, 1 microsecond pulselength and 10 Hz repetition rate. At the conclusion of this program, the magnicon was undergoing high-power conditioning, having already demonstrated high-power operation, phase stability, a linear drive curve, amore » small operational frequency bandwidth and a spectrally pure, single-mode output.« less.Fairchild, Jerry F.; Koonmen, James P.; Thome, Frank V.1992-01-01A consortium of US agencies are involved in the Thermionic System Evaluation Test (TSET) which is being supported by the Strategic Defense Initiative Organization (SDIO).

The project is a ground test of an unfueled Soviet TOPAZ-II in-core thermionic space reactor powered by electrical heat. It is part of the United States' national thermionic space nuclear power program. It will be tested in Albuquerque, New Mexico at the New Mexico Engineering Research Institute complex by the Phillips Laboratoty, Sandia National Laboratories, Los Alamos National Laboratory, and the University of New Mexico. One of TSET's many objectives is to demonstrate that the US can operate and test a complete space nuclear power system, in the electrical heater configuration, at a low cost. Great efforts have been made to help reduce facility costs during the first phase of this project. These costs include structural, mechanical, and electrical modifications to the existing facility as well as the installation of additional emergency systems to mitigate the effects of utility power losses and alkali metal fires.Goodale, D.

B.; Lee, C.; Lieb, D.; Oettinger, P. E.1979-01-01This paper presents evaluation of a variety of thermionic converter configurations to obtain improved efficiency. A variable-spacing diode using an iridium emitter gave emission properties comparable to platinum, but the power output from a sintered LaB6 collector diode was not consistent with its work function. Reflectivities above 0.5 were measured at thermal energies on oxygenated-cesiated surfaces using a field emission retarding potential gun.

Performance of converters with structured electrodes and the characteristics of a pulsed triode were studied as a function of emitter, collector, cesium reservoir, interelectrode spacing, xenon pressure, and pulsing parameters.Hatch, George L.; Brummond, William A.; Barrus, Donald M.1986-01-01A temperature responsive thermionic gas switch having folded electron emitting surfaces. An ionizable gas is located between the emitter and an interior surface of a collector, coaxial with the emitter. In response to the temperature exceeding a predetermined level, sufficient electrons are derived from the emitter to cause the gas in the gap between the emitter and collector to become ionized, whereby a very large increase in current in the gap occurs.

Teco Servo Model Jsma Pmb10 Abk Dimensions Guide

Due to the folded emitter surface area of the switch, increasing the 'on/off' current ratio and adjusting the 'on' current capacity is accomplished.Lewis, Patrick R; Manginell, Ronald P; Wheeler, David R; Trudell, Daniel E2012-10-30A microfabricated TID comprises a microhotplate and a thermionic source disposed on the microhotplate. The microfabricated TID can provide high sensitivity and selectivity to nitrogen- and phosphorous-containing compounds and other compounds containing electronegative function groups. The microfabricated TID can be microfabricated with semiconductor-based materials.