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You searched on: Author: ray radebaugh Sorted by: title

Displaying records 1 to 10 of 76 records.
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1. 120Hz Pulse Tube Cryocooler for Fast Cooldown to 50K
Published: 2/13/2007
Authors: Srinivas Vanapalli, Michael A Lewis, Zhihua Gan, Ray Radebaugh
Abstract: A pulse tube cryocooler operating at 120 Hz with 3.5 MPa average pressure achieved a no-load temperature of about 49.9 K and a cooldown time to 80 K of 5.5 minutes. The net refrigeration power at 80 K was 3.35 W with an efficiency of about 22.6% of C ...

2. 3-D Flow Model for Cryocooler Regenerators
Published: 12/1/1997
Authors: J S Nigen, Y Yaron, K C Karki, S V Pantankar, Ray Radebaugh

3. A Cryogenic Catheter for Treating Heart Arrhythmia
Published: 6/1/1998
Authors: E D. Marquardt, Ray Radebaugh, J Dobak
Abstract: Progress in the development of a cryogenic catheter to treat heart arrhythmia is discussed. This system uses a mixed-gas Joule-Thomson refrigerator to cool the tip of a catheter that cen be indserted into the body through the large ceins leading int ...

4. A Half Century of Cryogenics and CSA
Published: 5/5/2014
Author: Ray Radebaugh
Abstract: 1964 seems just like yesterday to me, yet it was 50 years ago. The Cryogenic Society of America (CSA) was born that year, and I was just beginning my professional career in cryogenics. Because I have been active in cryogenics for all these past 50 ...

5. A Polyimide Micro Heat Exchanger With a Suspended 3D Parallel Channel Structure for Cryogenic Application
Published: 11/11/2011
Authors: Yunda Wang, Ryan John Lewis, Mu Hong Lin, Yiwei Yan, Ray Radebaugh, Peter E Bradley, Yung-Cheng Lee
Abstract: A heat exchanger (HX) plays an important role in many cryogenic systems. This paper demonstrates a fully integrated fabrication process to make a novel monolithic polyimide micro heat exchanger. The structure of this heat exchanger consists of two p ...

6. Advances in Cryocoolers
Published: 12/1/1997
Author: Ray Radebaugh

7. Analysis of Mass Flow Rates and Energy Flow Rates in an Orifice Pulse Tube Refrigerator
Published: 12/1/1999
Authors: F Kuriyama, Ray Radebaugh

8. Analysis of Mass Flow Rates and Energy Flow Rates in an Orifice Pulse Tube Refrigerator
Published: 1/1/1999
Authors: F Kuriyama, Ray Radebaugh
Abstract: The curves of mass flow rates and temperatures as a function of time have a different shape from those for pressure in an orifice pulse tibe refrigerator. The relationship among them is analyzed to explain the distortion of mass flow rate and temper ...

9. Application of the Periodic Temperature Variation Technique to the Measurement of Heat Transfer Coefficients in High-NTU Matrices
Published: 12/1/1997
Authors: J A Ramirez, K D Timmerhaus, Ray Radebaugh

Published: 3/16/2008
Authors: Ray Radebaugh, Yonghua Huang, Agnes O¿Gallagher, John Gary
Abstract: The helium-4 working fluid in regenerative cryocoolers operating with the cold end near 4 K deviates considerably from an ideal gas. As a result, losses in the regenerator, given by the time-averaged enthalpy flux, are increased and are strong functi ...

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