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 -15â-▪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.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Publisher | SPIE |
| Volume | 9144 |
| ISBN (Print) | 9780819496126 |
| DOIs | |
| Publication status | Published - 2014 |
| Event | Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray - Montreal Duration: 2014 Jun 22 → 2014 Jun 26 |
Other
| Other | Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray |
|---|---|
| City | Montreal |
| Period | 14/6/22 → 14/6/26 |
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Keywords
- ASTRO-H.
- gamma-ray
- graphite sheet
- semiconductor detector
- thermal design
- X-ray
ASJC Scopus subject areas
- Applied Mathematics
- Computer Science Applications
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Thermal design of the hard x-ray imager and the soft gamma-ray detector onboard ASTRO-H. / Noda, Hirofumi; Nakazawa, Kazuhiro; Makishima, Kazuo; Iwata, Naoko; Ogawa, Hiroyuki; Ohta, Masayuki; Sato, Goro; Kawaharada, Madoka; Watanabe, Shin; Kokubun, Motohide; Ohno, Masanori; Fukazawa, Yasushi; Tajima, Hiroyasu; Uchiyama, Hideki; Ito, Shuji; Fukuzawa, Keita.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9144 SPIE, 2014. 91445E.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Thermal design of the hard x-ray imager and the soft gamma-ray detector onboard ASTRO-H
AU - Noda, Hirofumi
AU - Nakazawa, Kazuhiro
AU - Makishima, Kazuo
AU - Iwata, Naoko
AU - Ogawa, Hiroyuki
AU - Ohta, Masayuki
AU - Sato, Goro
AU - Kawaharada, Madoka
AU - Watanabe, Shin
AU - Kokubun, Motohide
AU - Ohno, Masanori
AU - Fukazawa, Yasushi
AU - Tajima, Hiroyasu
AU - Uchiyama, Hideki
AU - Ito, Shuji
AU - Fukuzawa, Keita
PY - 2014
Y1 - 2014
N2 - 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 -15â-▪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.
AB - 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 -15â-▪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.
KW - ASTRO-H.
KW - gamma-ray
KW - graphite sheet
KW - semiconductor detector
KW - thermal design
KW - X-ray
UR - http://www.scopus.com/inward/record.url?scp=84922496335&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84922496335&partnerID=8YFLogxK
U2 - 10.1117/12.2055379
DO - 10.1117/12.2055379
M3 - Conference contribution
AN - SCOPUS:84922496335
SN - 9780819496126
VL - 9144
BT - Proceedings of SPIE - The International Society for Optical Engineering
PB - SPIE
ER -