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The Adiabatic Demagnetization Refrigerator Controller (ADRC) in the XRISM Resolve instrument is the electronics box (ebox) responsible for the high-precision sub-K temperature readout and control of the multi-stage Adiabatic Demagnetization Refrigerator (ADR) subsystem. To achieve the science objectives stated above, the ADRC must provide a thermal stability better than 2.5 μK RMS (over a 10-minute interval) for the calorimeter detectors in both cryogen (liquid helium) and cryo-free modes. The ADRC has direct telemetry/command and power interfaces with the spacecraft and also provides sensor read-out and heater circuits for decontamination of the filters in the cold aperture.
As a part of the discussion on the design and performance of the ADRC, this paper will also include an overall view of the 50 mK temperature control, plus monitor and control of the aperture filter temperature for de-contamination purpose.
Ground test results of the micro-vibration interference for the x-ray microcalorimeter onboard XRISM
Vibration isolation system for cryocoolers of Soft X-ray Spectrometer (SXS) onboard ASTRO-H (Hitomi)
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