Thermal design of the hard x-ray imager and the soft gamma-ray detector onboard ASTRO-H

Hirofumi Noda; Kazuhiro Nakazawa; Kazuo Makishima; Naoko Iwata; Hiroyuki Ogawa; Masayuki Ohta; Goro Sato; Madoka Kawaharada; Shin Watanabe; Motohide Kokubun; Tadayuki Takahashi; Masanori Ohno; Yasushi Fukazawa; Hiroyasu Tajima; Hideki Uchiyama; Shuji Ito; Keita Fukuzawa

doi:10.1117/12.2055379

24 July 2014 Thermal design of the hard x-ray imager and the soft gamma-ray detector onboard ASTRO-H

Hirofumi Noda, Kazuhiro Nakazawa, Kazuo Makishima, Naoko Iwata, Hiroyuki Ogawa, Masayuki Ohta, Goro Sato, Madoka Kawaharada, Shin Watanabe, Motohide Kokubun, Tadayuki Takahashi, Masanori Ohno, Yasushi Fukazawa, Hiroyasu Tajima, Hideki Uchiyama, Shuji Ito, Keita Fukuzawa

Author Affiliations +

Proceedings Volume 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray; 91445E (2014) https://doi.org/10.1117/12.2055379
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

The Hard X-ray Imager and the Soft Gamma-ray Detector, onboard the 6th Japanese X-ray satellite ASTRO-H, aim at unprecedentedly-sensitive observations in the 5–80 keV and 40–600 keV bands, respectively. Because their main sensors are composed of a number of semi-conductor devices, which need to be operated in a temperature of –20 to –15◦C, heat generated in the sensors must be efficiently transported outwards by thermal conduction. For this purpose, we performed thermal design, with the following three steps. First, we additionally included thermally-conductive parts, copper poles and graphite sheets. Second, constructing a thermal mathematical model of the sensors, we estimated temperature distributions in thermal equilibria. Since the model had rather large uncertainties in contact thermal conductions, an accurate thermal dummy was constructed as our final step. Vacuum measurement with the dummy successfully reduced the conductance uncertainties. With these steps, we confirmed that our thermal design of the main sensors satisfies the temperature requirement.

Citation Download Citation

Hirofumi Noda, Kazuhiro Nakazawa, Kazuo Makishima, Naoko Iwata, Hiroyuki Ogawa, Masayuki Ohta, Goro Sato, Madoka Kawaharada, Shin Watanabe, Motohide Kokubun, Tadayuki Takahashi, Masanori Ohno, Yasushi Fukazawa, Hiroyasu Tajima, Hideki Uchiyama, Shuji Ito, and Keita Fukuzawa "Thermal design of the hard x-ray imager and the soft gamma-ray detector onboard ASTRO-H", Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 91445E (24 July 2014); https://doi.org/10.1117/12.2055379

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
11 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

Cameras

Aluminum

Copper

Mathematical modeling

Imaging systems

Hard x-rays

Show All Keywords

Keywords/Phrases

Search In:

Publication Years