کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7915805 | 1511025 | 2017 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cryogen free cooling of ASTRO-H SXS Helium Dewar from 300â¯K to 4â¯K
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Soft X-ray Spectrometer instrument (SXS) is one of the primary scientific instruments of ASTRO-H. SXS has a cold detector that is cooled to 50â¯mK by using a multi-stage Adiabatic Demagnetization Refrigerator (ADR). SXS Dewar containing ADR provides 1.3â¯K heat sink by using liquid helium in nominal operation. After liquid helium is dried up, 4â¯K heat sink is provided by using mechanical coolers. Both nominal operation and cryogen free operation were successfully demonstrated. This paper describes the test result of cryogen free operation and cool-down performance from room temperature by using only mechanical coolers without liquid helium. The coolers on the Dewar cooled down cold mass from around 300â¯K to 4â¯K with 260â¯W electric power in 40â¯days. Cold mass is 35â¯kg in 4â¯K area including the helium tank, ADR and detector assembly.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cryogenics - Volume 88, December 2017, Pages 143-146
Journal: Cryogenics - Volume 88, December 2017, Pages 143-146
نویسندگان
Ken'ichi Kanao, Seiji Yoshida, Mikio Miyaoka, Shoji Tsunematsu, Kiyomi Otsuka, Shunji Hoshika, Katsuhiro Narasaki, Kazuhisa Mitsuda, Noriko Yamasaki, Yoh Takei, Ryuji Fujimoto, Yoichi Sato, Atsushi Okamoto, Hirofumi Noda, Michel J. DiPirro,