Share Email Print
cover

Journal of Astronomical Telescopes, Instruments, and Systems • Open Access

Thermal stress test of the depth-graded platinum/carbon reflectors
Author(s): Yoshitomo Maeda; Kou Ichihara; Hiroaki Kan; Yu Shionome; Takuro Sato; Toshiki Sato; Takayuki Hayashi; Manabu Ishida; Yoshiharu Namba; Hideaki Takahashi; Takuya Miyazawa; Kazunori Ishibashi; Michito Sakai; Satoshi Sugita; Yoshito Haba; Hironori Matsumoto; Hideyuki Mori

Paper Abstract

The ASTRO-H hard x-ray telescope (HXT) is designed to reflect hard x-rays with energies up to 80 keV. It will make use of thin-foil, multinested conical optics with depth-graded platinum/carbon (Pt/C) multilayers. We report on thermal stress tests of the HXT reflectors. The reflectors were fabricated on a heat-formed aluminum substrate of thickness gauged at 200  μm of the alloy 5052. This was followed by an epoxy replication on Pt/C-sputtered smooth Pyrex cylindrical mandrels to acquire the x-ray reflective surface. For the thermal tests, the reflectors were maintained at three different temperatures: −5, 50, and 60°C, respectively, for a week. We found that the surface of the reflectors were significantly changed at temperatures of 60°C or higher. The change appears as wrinkles with a typical scale length of a few tens of microns. No changes on the surface were observed from the −5 and 50°C samples. There was also no change in the x-ray reflectivity for these two temperatures.

Paper Details

Date Published: 29 June 2015
PDF: 4 pages
J. Ast. Inst. Sys. 1(3) 034001 doi: 10.1117/1.JATIS.1.3.034001
Published in: Journal of Astronomical Telescopes, Instruments, and Systems Volume 1, Issue 3
Show Author Affiliations
Yoshitomo Maeda, Institute of Space and Astronautical Science (Japan)
Kou Ichihara, Institute of Space and Astronautical Science (Japan)
Tokyo Metropolitan Univ. (Japan)
Hiroaki Kan, Osaka Univ. (Japan)
Yu Shionome, Institute of Space and Astronautical Science (Japan)
Tokyo Metropolitan Univ. (Japan)
Takuro Sato, Institute of Space and Astronautical Science (Japan)
Tokyo Metropolitan Univ. (Japan)
Toshiki Sato, Institute of Space and Astronautical Science (Japan)
Tokyo Metropolitan Univ. (Japan)
Takayuki Hayashi, Nagoya Univ. (Japan)
Manabu Ishida, Institute of Space and Astronautical Science (Japan)
Tokyo Metropolitan Univ. (Japan)
Yoshiharu Namba, Chubu Univ. (Japan)
Hideaki Takahashi, Chubu Univ. (Japan)
Takuya Miyazawa, Nagoya Univ. (Japan)
Kazunori Ishibashi, Nagoya Univ. (Japan)
Michito Sakai, Japan Aerospace Exploration Agency (Japan)
Satoshi Sugita, Ehime Univ. (Japan)
Yoshito Haba, Aichi Univ. of Education (Japan)
Hironori Matsumoto, Japan Aerospace Exploration Agency (Japan)
Hideyuki Mori, Japan Aerospace Exploration Agency (Japan)
NASA Goddard Space Flight Ctr. (United States)


© SPIE. Terms of Use
Back to Top