Qualification and Test Results of a 5 Watt Commercial Stirling Cryocooler, to be published in the proc. of Adv. in Cryogenic Engineering, vol. 47, 2001. (with D.T.Kuo and T.D. Lody)         Abstract        Download

Cryocooler Contamination Study: Temperature Dependence of Outgassing, to be published in the proc. of the 11^th International Cryocooler Conference, 2000. (with D.T.Kuo)         Abstract        Download

BAE's Life Test result on Various Linear Coolers and Their Correlation with a First Order Life Estimation Method, to be published in the proc. of the 11^th International Cryocooler Conference, 2000. (with D.T.Kuo and T.D.Lody)         Abstract        Download

"Cryocooler Contamination Study", in the proc. of Adv. in Cryogenic Engineering, vol. 45A, P275, 1999.  (with D.T.Kuo and A.S. Loc)         Abstract        Download

"Cryocooler Life Estimate and Its Correlation with Experimental Data", in the proc. of Adv. in Cryogenic Engineering, vol. 45A, P267, 1999.  (with D.T.Kuo, A.S.Loc and T.D.Lody)         Abstract        Download

"Performance and Qualification of BEIs 600 mW Linear Motor Cooler", in the proc. of Adv. in Cryogenic Engineering, vol. 45A, P251, 1999. (with D.T.Kuo, A.S.Loc and T.D.Loc)          Abstract        Download

"Thermal Management of Computer Systems Using Active Cooling of Pulse Tube Refrigerators", paper presented at the Pacific Rim / ASME International, Electronic Packaging Technical / Business Conference, 1999 (with Henry Jung, Intel Co.) Abstract        Download

"Design and Preliminary Testing of BEIs CryoPulse 1000, the Commercial One Watt Pulse Tube Cooler", Proceedings of the 10^th International Cryocooler Conference, P191, 1998. (with D.T.Kuo and A.S.Loc)         Abstract        Download

"Qualification of the BEI B512 Cooler, Part 1 - Environmental Tests", Proceedings of the 10^th International Cryocooler Conference, P105, 1998. (with D.T.Kuo and A.S.Loc)         Abstract        Download

"Vapor-Liquid Phase Separation of He-II", Cryogenices, Vol. 38, Number 9, P921, 1998.  (with A.R. Urbach, S.M. Volz, J.H.Lee)    Abstract        Download

"Design of a 0.5 Watt Dual Use Long-Life Low-Cost Pulse Tube Cooler", in Proc. of Advances of Cryogenic Engineering Conference, vol. 43B, P2039, 1997. (with D.T.Kuo, A.S.Loc and A.L. Johnson)         Abstract        Download

"Experimental Performance of the BEI One Watt Linear (OWL) Stirling Cooler", in Proc. of Advances of Cryogenic Engineering Conference, vol. 43B, P1855, 1997. (with D.T.Kuo, A.S.Loc and T.D.Lody)         Abstract        Download

"Enhanced Performance of the BEI 0.5 Watt Mini-Linear Stirling Cooler" , Proc. of Advances of Cryogenic Engineering Conference, vol. 43B, P1847, 1997. (with D.T.Kuo and A.S.Loc)         Abstract        Download

"Experimental and Predicted Performance of the BEI Mini-Linear Cooler", Proc. of the 9th International Cryocooler Conference, Waterville, New Hampshire, P119, 1996. (D.T.Kuo and A.S.Loc)         Abstract        Download

"Validation of the Pulse Tube Refrigerator Model Against a Lockheed Built Pulse Tube Cooler", Cryogenics, vol. 36, No. 10, (1996) p. 871.         Abstract        Download

 "A Blind Test on the Pulse Tube Refrigerator Model", in Proc. of Advances in the Cryogenic Engineering, 1996, Vol. 41, p.1383-1388.(with Ray Radebaugh).         Abstract        Download

 "The Dependence of Choked Flow and Breakthrough on Pore Size Distribution in Vapor-Liquid Phase Separation of He II Using Porous Media", in Proc. of Advances in Cryogenic Engineering, 1996, Vol. 41B, P1189-1194 (with D.J. Frank & Chris Lages).

 "Experimental Results of Test Performed on Superfluid Helium Phase Separators for the Relativity Mission", in Proc. of Advances in Cryogenic Engineering, 1996, Vol. 41B, P1195-1201 (with D.J. Frank).

 "On He II Inertia Effects in Short Narrow Ducts: Entrance Effects Associated with Boundary Layer Development", Proc. of the International Symposium on Safety of Superconductors and Related Heat Transfer at Low Temperatures, 1995 (with T.H.K. Frederking and T.K. Lesniewski).

 "Counterflow at Intermediate Velocities - He II Inertia Effects in Short Narrow Ducts", Physica B 194-196, 1994, p.559 (with T.H.K. Frederking and T.K. Lesniewski).

 "Prediction of Natural Frequency of the NASA 80K Cooler by the Stirling Refrigerator Performance Model", Cryogenics, 1994, vol. 34, No. 5, p.383 (with L.G. Naes and T.C. Nast).

 "Validation of the Stirling Refrigerator Performance Model Against the Oxford Refrigerator", Advances in Cryogenic Engineering, 1994, vol. 39, p.1359 (with I.E. Spradley and W.G. Foster).

 "Validation of the Stirling Refrigerator Performance Model Against the Philips/NASA Magnetic Bearing Refrigerator", Proc. of the 7th International Crycooler Conference, 1993, vol. p.280 (with I.E. Spradley).

    "Computer Simulation Model for Lucas Stirling Refrigerators", Cryogenics, 1992, vol. 32, No. 2, p. 143. (With I.E. Spradley, P.M. Yang
and T.C. Nast.)

 "A Third Order Computer Model for Stirling Refrigerators", Proc. Advances in Cryogenic Engineering, 1992, vol. 37B, p. 1055.  (With I.E. Spradley.)         Abstract        Download

 "Prediction of Thermal Acoustic Oscillations (TAOs) in the CLAES Solid CO2/Neon System", Proc. Advances in Cryogenic Engineering, 1992, vol. 37B, p. 257.  (With I.E. Spradley)         Abstract        Download

 "Heat Transfer in Very Narrow Channels of Low Temperature Devices Used for Fluid Management of He II in Space", Cryogenics, 1992, vol. 32, No. 5, p. 473.

 "Thermal Contact Domain Resistance:  Overall Solid Helium-4 Kapitza Resistance", Proc. of the 5th AIAA/ASME Thermophysics and Heat Transfer Conference, Seattle, July 1990, HTD-vol. 134, p. 45.  (With T.H.K. Frederking.) Abstract        Download

 "Superfluidity and Its Applications in Space", Cryogenics, 1990, vol. 30, p. 222.

 "Heat Flow in Space Cryogenics Plugs:  Normal Fluid Counterflow Convection at Moderate Heat Flux Densities", Cryogenics, 1990, vol. 30, p. 184.  (With T.H.K. Frederking.)

 "Space Cryogenics Components Based on the Thermomechanical Effect", Journal of Thermophysics & Heat Transfer, 1990, vol. 3, No. 406-415.  (With T.H.K. Frederking.)          Abstract        Download

 "Active Phase Separation of He II Using Porous Media", Proc. Advances in Cryogenic Engineering Conference, 1989, vol. 35, p. 197.  (With T.C. Nast and T.H.K. Frederking.)

 "Experimental Verification of a Tank to Tank He II Transfer Model", Proc. Advances in Cryogenic Engineering Conference, 1989, vol. 35, p. 335.  (With T.H.K. Frederking.)

 "Thermodynamics of Tank to Tank He II Transfer", Proc. of the 12th International Cryogenic Engineering Conference, Southampton, United Kingdom, July 1988, p. 657.  (With T.C. Nast.)

 "An Integrated Fountain Effect Pump for Fluid Management at Low-G", Cryogenics, 1988, vol. 28, p. 115.  (With D.J. Frank.)

 "An Enclosed Capillary Device for Low-G Management of He II", Cryogenics, 1988, vol. 28, p. 126.  (With D.J. Frank.)

 "The Design of Fountain Effect Pumps", Proc. Advances in Cryogenic Engineering Conference, 1987, vol. 33, p. 457.  (With T.C. Nast).

 "Turbulent Transport of He II in Active and Passive Phase Separators Using Slit Devices and Porous Media", Proc. Advances in Cryogenic Engineering Conference, 1987, vol. 33, p. 431.  (With J.M. Lee and T.H.K. Frederking.)

 "He II Reservoir Heating to the Lambda Point Vicinity:  Superheating Effects", in the proceedings of the 18th International Low Temperature Physics Conference, Japanese Journal of Applied Physics, 1987, vol. 26, supplement 26-3, p. 55.  (With T.H.K. Frederking and Herbert Simanjuntak.)

 "Channel Size Influence on the Heat Flux Density at Zero Net Mass Flow in the Non-Linear Transport Regime Between 1.2 K and 2.1 K", in the proceedings of the 17th Internationaler Kongress Fur Kaltetechnik, 1987, vol. A, p. 72.  (With T.H.K. Frederking, J.M. Lee and G.S. Sun.)         Abstract        Download

 "Non-Linear Vapor-Liquid Phase Separation Including Microgravity Effects", Cryogenics, 1987, vol. 27, p. 27.  (With T.H.K. Frederking.)          Abstract        Download

 "Heat and Mass Transfer in Porous Media Phase Separation at Temperatures Below the Lambda-Point of He-4", in the Proceedings of the 8th International Heat Transfer Conference, San Francisco, August 17-22, 1986, vol. 5, p. 2683.  (With T.H.K. Frederking.)

 "Gravity Probe B Dewar/Probe Concept", in the Proceedings of the SPIE Conference, 1986, vol. 619, p. 126.  (With R.T. Parmley, J. Goodman and M. Regelbrugge.) Abstract        Download

 "Fountain Effect Pump Phenomena for Liquid Helium Transfer Thermodynamic System Studies", Cryogenics, 1986, vol. 26, p. 93.  (With T.H.K. Frederking and R.M. Carandang.)

 "Determination of the Darcy Permeability of Porous Media Below 4 K", Proc. Advances in  Cryogenic Engineering, 1985, vol. 31, p. 505.  (With T.H.K. Frederking, W.A. Hepler and W.F. Feng.)

 "Equations for Heat and Mass Flow of Non-Newtonian Fluid Through Porous Media:  Liquid He II - Helium - 4 Vapor Separation", in the Proceedings of the National Heat Transfer Conference (ASME), Denver, Colorado, August 1985, Paper 85-HT-5.  (With Jeffrey M. Lee, W.A. Hepler and T.H.K. Frederking.)          Abstract        Download

 "Simplified Thermodynamic Functions for Vapor-Liquid Phase Separation and Fountain Effect Pumps", Proc. Cryogenic Process and Equipment, ASME, New Orleans, Louisiana, Dec. 1984, p. 169.  (With W.A. Hepler and T.H.K. Frederking.)

 "Comparison of Flow Through Porous Plugs:  Is the Darcy Permeability a Useful Measure of Throughput?", Proc. Space Cryogenic Workshop, Berlin, W. Germany, August 1984, p. 83.  (With J.M. Lee, W.A. Hepler and T.H.K. Frederking.)

 "Thermodynamic Performance Evaluation of Liquid Pumps Based on the Fountain Effect of Superfluid Liquid Helium II", Proc. 10th International Cryogenic Engineering Conference, Otaniemi, Finland, August 1984, p. 301.  (With T.H.K. Frederking.)

 "Sintered Plug Flow Modulation of a Vapor-Liquid Phase Separator for a Helium II Vessel", Proc. Advances in Cryogenic Engineering, 1984, vol. 29, p. 687.  (With T.H.K. Frederking, C. Chuang, Y. Kamioka and J.M. Lee.)          Abstract        Download

 "Plug Flow Comparison", Proc. Space Helium Dewar Conference and Workshop, Huntsville, Alabama, August 1983, p. 149.  (With J.M. Lee, Y. Kamioka and T.H.K. Frederking.)

 "Darcy Law of Thermo-Osmosis for Zero Net Mass Flow at Low Temperatures", in Proc. of ASME-JSME Thermal Engineering Joint Conference, Honolulu, Hawaii, March 1983, vol. 2, p. 191.  (With T.H.K. Frederking.)         Abstract        Download
 
 

REPORTS:

 "Superfluid Helium Tanker Study (SFHT)", Final Report to NASA Johnson Space Center, August 1988, Lockheed Report LMSC-F223517.  (With D.C. Read, Bob Bell and T.C. Nast.)

 "Study of Helium Transfer Technology for STICCR - Fluid Management", prepared for NASA Ames Research Center, July 1987, NCR-177463.  (With D.J. Frank, R.K. Grove, and J.M. L'Heureux.)

 "Advanced Long Life Cooler Development Program - 1985", Prepared for Hughes Aircraft Company, January 1986, Lockheed Report LMSC-D062022.  (With D.J. Frank, T.C. Nast, C.J. Skogh, and I.E. Spradley.)

 "Dynamic Instulation Systems", prepared for NASA Ames Research Center, October 1985, UCLA-ENG-8532.  (With W.E.W. Chen, W.A. Hepler, and T.H.K. Frederking.)

 Separator Plugs for Liquid Helium", prepared for NASA Ames Research Center, October 1984, UCLA-ENG-8436.  (With J.M. Lee, W.A. Hepler, and T.H.K. Frederking.)

 "Thermo-Osmotic Transport Phenomena Associated with Vapor-Liquid Phase Separation at Low Temperatures", prepared for National Science Foundation, April 1984, UCLA-ENG-8406.  (With W.A. Hepler, and T.H.K. Frederking.)

 "Thermo-Osmotic Porous Plug Phase Separation Processes Including 'Single-Grain' Phenomena", prepared for National Science Foundation, January 1984, UCLA-ENG-8402.  (With J.M. Lee, W.A. Hepler, Y.I. Kim, and T.H.K. Frederking.)

 "Vapor-Liquid Phase Separator Studies", prepared for NASA Ames Research Center, October 1983, UCLA-ENG-8349.  (With J.M. Lee, Y.I. Kim, WA. Hepler, and T.H.K. Frederking.)

 "Thermo-Osmotic Equilibration Phenomena in Porous Media Including Axial Transport", prepared for National Science Foundation, March 1983, UCLA-ENG-8316.  (With Y.I. Kim, J.M. Lee, W.A. Hepler, M. Johnson, and T.H.K. Frederking.)

 "Vapor-Liquid Phase Separator:  Permeability Results", Annual Report to NASA Ames Research Center from fall 1980 to September 1981, UCLA-ENG-8134.  (With T.H.K. Frederking.)

 "Vapor-Liquid Phase Separator", Final Report to NASA Ames Research Center, October 1980, UCLA-ENG-8073.  (With T.H.K. Frederking, G.S. Brown, C. Chuang, Y. Kamioka, Y.I. Kim and J.M. Lee.)
 

LIST OF THESES:

 "The Non-Newtonian Heat and Mass Transport of He II in Porous Media Used for Vapor-Liquid Phase Separation", Ph.D. Dissertation, U.C.L.A., 1985.

 "The Characterization of Sintered Stainless Steel Porous Plugs for Vapor-Liquid Phase Separation of He II", Master Thesis, U.C.L.A., 1981.
 
 

U.C.L.A. EXTENSION COURSE CLASS NOTES:

 "Fundamentals of Superconductivity", U.C.L.A. Extention Short Course, July 1989.  (With K. Andres, R. Flukiger and M.B. Pate.)
 

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About the author- Dr. Sidney Yuan is a consultant in the field of Low Temperature Physics and Cryogenics, and has written a Book on Cryogenics and published extensively in the field. E-Mail.

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