Conveners
C3Or4A: Aerospace Coolers I: Sub-2 Kelvin
- James Tuttle (NASA Goddard Space Flight Center)
- John Brisson (MIT)
Hold time of an adiabatic demagnetization refrigerator(ADR) is very important for astronomy missions. The hold time depends on two factors, ADR’s cooling power and heat load. Generally, the cooling power of an ADR is small. It becomes necessary to minimize heat load. A main source of heat load comes from the gas gap heat switch (GGHS). When the GGHS is in OFF status, the heat load is demined...
High sensitivity astrophysics detectors such as transition edge sensor (TES) bolometers or microwave kinetic inductance detectors (MKIDs) require sub-Kelvin operating temperatures for observing low energy photons in infrared and x-ray ranges. Continuous Adiabatic Demagnetization Refrigerators (CADRs) are presently the state of the art solution for providing cooling to these detectors below as...
The astrophysics Xray Imaging and Spectroscopy Mission (XRISM) contains two instruments. The spectrometer, Resolve, uses x-ray microcalorimeters operating at 50 mK to obtain photon-limited spectroscopy in the 0.5 to 10 keV range. As a precooler to the Adiabatic Demagnetization Refrigerator that reaches 50 mK, a 40 liter superfluid helium dewar and a 4.5 K Joule-Thomson cooler are used. ...
