Translator Disclaimer
18 July 2016 Performance of the helium dewar and cryocoolers of ASTRO-H SXS
Author Affiliations +
The Soft X-ray Spectrometer (SXS) is a cryogenic high-resolution X-ray spectrometer onboard the ASTRO-H satellite, that achieves energy resolution better than 7 eV at 6 keV, by operating the detector array at 50 mK using an adiabatic demagnetization refrigerator. The cooling chain from room temperature to the ADR heat sink is composed of 2-stage Stirling cryocoolers, a 4He Joule-Thomson cryocooler, and super uid liquid He, and is installed in a dewar. It is designed to achieve a helium lifetime of more than 3 years with a minimum of 30 liters. The satellite was launched on 2016 February 17, 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 He 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 cryocoolers.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.


The ASTRO-H X-ray astronomy satellite
Proceedings of SPIE (July 24 2014)
Development of a photon counting near fano limited x ray...
Proceedings of SPIE (December 13 2020)
New x-ray telescope mission (NeXT)
Proceedings of SPIE (January 29 2004)
The x-ray mirrors for the EXIST/SXI telescope
Proceedings of SPIE (July 29 2010)
Current status of Suzaku and its early results
Proceedings of SPIE (June 15 2006)

Back to Top