brad moore m.s. student room: 1337 507 884 9258 hometown: rochester, mn
DESCRIPTION
Brad Moore M.S. Student Room: 1337 507 884 9258 Hometown: Rochester, MN. Thesis: Development of a Passive Check Valve for Cryogenic Applications. Background. Astrophysics missions employing Microcalorimetry and Transition edge sensors have a need for sub-Kelvin (TRANSCRIPT
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Brad MooreM.S. StudentRoom: 1337507 884 9258Hometown: Rochester, MN
Thesis: Development of a Passive Check Valve for Cryogenic Applications
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Astrophysics missions employing Microcalorimetry and Transition edge sensors have a need for sub-Kelvin (<1K) cooling.
A Cold Cycle Dilution Refrigerator (CCDR) provides an alternative to the current space based sub-kelvin cooling - Adiabatic Demagnetization Refrigerators or LHe3 Cryostats.
The CCDR provides cooling through the endothermic mixing of He3-He4 isotopes at low temperatures.
A reversible paramagnetic pump drives the flow through the cycle, however the flow provided is oscillating and must be rectified through the use of check valves.
Background
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Development, fabrication and testing of a check valve for use in the CCDR.
Requirements: Passive – no electric or mechanical actuation Operate at low temperatures (~1.8 K) with a mixture
of He3-He4. Seal at low back pressures (~3psi) Negligible cracking pressure required to open
Objectives
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Check ValveTeflon seat reed check valve currently being refined and tested.