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首页> 外文会议>Conference on space telescopes and instrumentation >Design and on-orbit operation of the adiabatic demagnetization refrigerator on the Hitomi Soft X-ray Spectrometer instrument
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Design and on-orbit operation of the adiabatic demagnetization refrigerator on the Hitomi Soft X-ray Spectrometer instrument

机译：Hitomi Soft X射线光谱仪仪器上的绝热去磁制冷机的设计和在轨运行

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摘要

The Soft X-ray Spectrometer instrument on the Astro-H observatory contains a 6×6 array of x-ray microcalorimeters, which is cooled to 50 mK by an adiabatic demagnetization refrigerator (ADR). The ADR consists of three stages in order to provide stable detector cooling using either a 1.2 K superfluid helium bath or a 4.5 K Joule-Thomson (JT) cryocooler as its heat sink. When liquid helium is present, two of the ADR's stages are used to single-shot cool the detectors while rejecting heat to the helium. After the helium is depleted, all three stages are used to cool both the helium tank (to about 1.5 K) and the detectors (to 50 mK) using the JT cryocooler as its heat sink. The Astro-H observatory, renamed Hitomi after its successful launch in February 2016, carried approximately 36 liters of helium into orbit. On day 5, the helium had cooled sufficiently (<1.4 K) to allow operation of the ADR. This paper describes the design, operation and on-orbit performance of the ADR.
机译：Astro-H天文台上的软X射线光谱仪仪器包含6×6的X射线微热量计阵列，并通过绝热退磁制冷机（ADR）将其冷却至50 mK。 ADR由三个阶段组成，以使用1.2 K超流氦浴或4.5 K焦耳-汤姆森（JT）低温冷却器作为散热器来提供稳定的探测器冷却。当存在液态氦时，ADR的两个阶段用于单次冷却检测器，同时将热量散发到氦中。氦耗尽后，使用JT低温冷却器作为散热器，将这三个阶段全部用于冷却氦罐（至约1.5 K）和检测器（至50 mK）。 Astro-H天文台在2016年2月成功发射后更名为Hitomi，将约36升氦气送入轨道。在第5天，氦气已充分冷却（<1.4 K）以允许ADR运行。本文介绍了ADR的设计，操作和在轨性能。

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