Cooling system for the Resolve onboard XRISM

Cooling system for the Resolve onboard XRISM

•We designed the cooling system from room temperature to about 1 K for XRISM Resolve.•Based on ASTRO-H (Hitomi) SXS lessons learned, changes on the design are adopted and new tests are planned.•The major design changes include an aperture baffle, an eddy current damper and a new vibration isolation...

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Bibliographic Details
Published in:Cryogenics (Guildford) Vol. 108; pp. 103016 - 5
Main Authors: Ezoe, Yuichiro, Ishisaki, Yoshitaka, Fujimoto, Ryuichi, Takei, Yoh, Horiuchi, Takafumi, Tsujimoto, Masahiro, Ishikawa, Kumi, Yasuda, Susumu, Yanagase, Keiichi, Shibano, Yasuko, Sato, Kosuke, Kitamoto, Shunji, Yoshida, Seiji, Kanao, Keiichi, Tsunematsu, Shoji, Otsuka, Kiyomi, Mizunuma, Syou, Isshiki, Masahito, Kelley, Richard L., Kilbourne, Calorine A., Porter, Frederick S., DiPirro, Michael J., Shirron, Peter
Format: Journal Article
Language:English
Published: Amsterdam Elsevier Ltd 01-06-2020
Elsevier BV
Subjects:
Adiabatic demagnetization
Adiabatic demagnetization cooling
Apertures
Calorimeters
Celestial bodies
Coolers
Cooling
Cooling systems
Demagnetization
Eddy currents
Fluids
Gate valves
He II systems
Heat sinks
Joule-Thomson coolers
Liquid helium
Micrometeoroids
Room temperature
Soft x rays
Space cryogenics
Space debris
Spectrum analysis
Stirling
Superfluidity
Thermistors
X ray imagery
X ray spectrometers
X ray telescopes
X-ray spectroscopy
Stirling
Adiabatic demagnetization
Space cryogenics
He II systems
Joule-Thomson coolers
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Summary:•We designed the cooling system from room temperature to about 1 K for XRISM Resolve.•Based on ASTRO-H (Hitomi) SXS lessons learned, changes on the design are adopted and new tests are planned.•The major design changes include an aperture baffle, an eddy current damper and a new vibration isolation system. The X-ray Imaging and Spectroscopy Mission (XRISM) is a recovery mission of ASTRO-H (Hitomi) launched in 2016. The Resolve instrument on the XRISM is an 6 × 6 array of silicon-thermistor microcalorimeters cooled down to 50 mK combined with a 5.6 m focal length X-ray telescope. Its design inherits that of the Soft X-ray Spectrometer (SXS) onboard ASTRO-H that demonstrated high resolution spectroscopy of the X-ray microcalorimeters by observing astronomical objects and providing superb resolution spectra. The cooling chain of the Resolve consists of a 3-stage adiabatic demagnetization refrigerator (ADR), a Joule-Thomson cooler, ~30 L superfluid helium, four Stirling coolers and a vacuum vessel or a dewar. Design of the Resolve cooling system is basically the same as that in the SXS but several changes are adopted based on lessons learned. This paper describes mainly the cooling system from room temperature to about 1 K providing the ADR heat sink. Major changes include an aperture baffle for micrometeoroid and orbital debris protection and optical light reduction, an eddy current damper to slow a gate valve opening, a new vibration isolation system with launch-locks.
ISSN:0011-2275
1879-2235
DOI:10.1016/j.cryogenics.2019.103016