The design, implementation, and performance of the Atro-H SXS calorimeter array and anti-coincidence detector

Kilbourne, Caroline A.; Adams, J. S.; Brekosky, Regis P.; Chervenak, James A.; Chiao, Meng P.; Eckart, Megan E.; Figueroa‐Feliciano, E.; Galeazzi, M.; Grein, C. H.; Jhabvala, Christine A.; Kelley, R. L.; Kelly, Daniel P.; Leutenegger, Maurice A.; McCammon, D.; Porter, F. S.; Szymkowiak, Andrew E.; Watanabe, Tomomi; Zhao, Jun

doi:10.1117/12.2231415

Cited by 21 publications

(20 citation statements)

References 12 publications

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“…The OVCS, MVCS, and IVCS were enshrouded by 50 layers, 30 layers, and 20 layers of multilayer insulation films, respectively. The JTS was cooled by a 4 He JT cryocooler that used two 2ST cryocooler units as precoolers (PC-A and PC-B), whereas the IVCS and the OVCS were cooled by two 2ST cryocooler units called shield coolers (SC-A and SC-B). The JT cryocooler was equipped with two compressor units in series, that were called JT-CMP-L and JT-CMP-H.…”

Section: Designmentioning

confidence: 99%

“…1 The soft x-ray spectrometer (SXS) 2,3 was a cryogenic high-resolution x-ray spectrometer onboard Hitomi, utilizing an x-ray microcalorimeter array. 4 Operated at 50 mK, it was designed to achieve a resolving power of 1000 or larger at 6 keV. The detector array was cooled to 50 mK using a three-stage adiabatic demagnetization refrigerator (ADR).…”

Section: Introductionmentioning

confidence: 99%

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Performance of the helium dewar and the cryocoolers of the Hitomi soft x-ray spectrometer

Fujimoto

Takei

Mitsuda

et al. 2017

J. Astron. Telesc. Instrum. Syst.

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Abstract. The soft x-ray spectrometer (SXS) was a cryogenic high-resolution x-ray spectrometer onboard the Hitomi (ASTRO-H) satellite that achieved energy resolution of 5 eV at 6 keV, by operating the detector array at 50 mK using an adiabatic demagnetization refrigerator (ADR). The cooling chain from room temperature to the ADR heat sink was composed of two-stage Stirling cryocoolers, a 4 He Joule-Thomson cryocooler, and superfluid liquid helium and was installed in a dewar. It was designed to achieve a helium lifetime of more than 3 years with a minimum of 30 L. The satellite was launched on February 17, 2016, and the SXS worked perfectly in orbit, until March 26 when the satellite lost its function. It was demonstrated that the heat load on the helium tank was about 0.7 mW, which would have satisfied the lifetime requirement. This paper describes the design, results of ground performance tests, prelaunch operations, and initial operation and performance in orbit of the flight dewar and the cryocoolers. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Section: Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance of the helium dewar and the cryocoolers of the Hitomi soft x-ray spectrometer

Fujimoto

Takei

Mitsuda

et al. 2017

J. Astron. Telesc. Instrum. Syst.

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“…The ADRC also controls the heaters on the optical blocking filters. 8 The heaters for both the IVCS and outer vapor-cooled shields (OVCS) filters were checked for their aliveness on Y þ 13. The temperature control of the Dewar main shell (DMS) filter heater was tested for 3.5 h on Y þ 13.…”

Section: Adiabatic Demagnetization Refrigerator Controllermentioning

confidence: 99%

“…4) in order to aid in planning for future microcalorimeter missions. Details are found in other articles of the same special section for the spacecraft, 1 the overall mission instrument, 2 the sensor and its performance, [8][9][10][11] the mirror and the aperture assembly, 12,13 the cooling chain, 5,14-17 the vibration isolation system, 18 the filter wheel (FW), 4 and the signal processing. 19,20 All data presented here are available in Ref.…”

Section: Introductionmentioning

confidence: 99%

In-orbit operation of the soft x-ray spectrometer onboard the Hitomi satellite

Tsujimoto

Mitsuda

Kelley

et al. 2017

J. Astron. Telesc. Instrum. Syst

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Abstract. We summarize all of the in-orbit operations of the soft x-ray spectrometer (SXS) onboard the ASTRO-H (Hitomi) satellite. The satellite was launched on February 17, 2016, and the communication with the satellite ceased on March 26, 2016. The SXS was still in the commissioning phase, in which the set-ups were progressively changed. This paper is intended to serve as a concise reference of the events in orbit in order to properly interpret the SXS data taken during its short lifetime and as a test case for planning the in-orbit operation for future microcalorimeter missions.

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“…The SXS detector array 4 is a 6 × 6 array of square pixels arranged with a 0.832-mm pitch, kept at a temperature of 50 mK, mounted inside a Dewar. The detector array has a minimum energy range of 0.3 to 12 keV and demonstrated an inflight energy resolution of 4.9 eV.…”

mentioning

confidence: 99%

Calibration sources and filters of the soft x-ray spectrometer instrument on the Hitomi spacecraft

Vries

Haas

Yamasaki

et al. 2017

J. Astron. Telesc. Instrum. Syst

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Abstract. The soft x-ray spectrometer was designed to operate onboard the Japanese Hitomi (ASTRO-H) satellite. In the beam of this instrument, there was a filter wheel containing x-ray filters and active calibration sources. This paper describes this filter wheel. We show the purpose of the filters and the preflight calibrations performed. In addition, we present the calibration source design and measured performance. Finally, we conclude with prospects for future missions.

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The design, implementation, and performance of the Atro-H SXS calorimeter array and anti-coincidence detector

Cited by 21 publications

References 12 publications

Performance of the helium dewar and the cryocoolers of the Hitomi soft x-ray spectrometer

Performance of the helium dewar and the cryocoolers of the Hitomi soft x-ray spectrometer

In-orbit operation of the soft x-ray spectrometer onboard the Hitomi satellite

Calibration sources and filters of the soft x-ray spectrometer instrument on the Hitomi spacecraft

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