Michael Lewis

Publications

Effect of Flow-Pressure Phase on Performance of Regenerators in the Range of 4 K to 20 K

June 17, 2013

Author(s)

Michael A. Lewis, Ryan P. Taylor, Peter E. Bradley, Ray Radebaugh

Modeling with REGEN3.3 has shown that the phase between flow and pressure at the cold end of 4 K regenerators has a large effect on their second-law efficiency

Development of a 4K Regenerator and Pulse Tube Test Facility

October 10, 2012

Author(s)

Michael A. Lewis, Peter E. Bradley, Ryan P. Taylor, Ray Radebaugh

Recent advances in superconducting electronic systems are requiring larger envelopes for cooling power, efficiency, and operational environments from commercial

Verification of the Back-EMF Method for Piston Velocity Measurements

July 10, 2012

Author(s)

Ray Radebaugh, Michael A. Lewis, Peter E. Bradley

Linear compressors are used to drive pulse tube or Stirling cryocoolers, and they can be used as expanders in place of inertance tubes when inertance tubes

Experiments with Linear Compressors for Phase Shifting in Pulse Tube Cryocoolers

June 13, 2011

Author(s)

Michael A. Lewis, Peter E. Bradley, Ray Radebaugh

For the past year NIST has been investigating the use of mechanical phase shifters as warm expanders for pulse tube cryocoolers. Unlike inertance tubes, which

Early LNG Program and LN2 Cryogenic Flow Measurement Facility at NIST

April 4, 2011

Author(s)

Daniel G. Friend, Michael A. Lewis

Powerpoint slides for LNG Metrology Workshop, Stockholm Sweden Nov 2010

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Michael Lewis (Assoc)

Guest Researcher

Publications

Effect of Flow-Pressure Phase on Performance of Regenerators in the Range of 4 K to 20 K

Development of a 4K Regenerator and Pulse Tube Test Facility

Verification of the Back-EMF Method for Piston Velocity Measurements

Experiments with Linear Compressors for Phase Shifting in Pulse Tube Cryocoolers

Early LNG Program and LN2 Cryogenic Flow Measurement Facility at NIST