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Proceedings Paper

Filter wheel system for the x-ray microcalorimeters on board ASTRO-E
Author(s): Tae Furusho; Noriko Y. Yamasaki; Yoshitaka Ishisaki; T. Toramatsu; Takaya Ohashi; Kazuhisa Mitsuda; Y. Ogawara; A. Fukatsu; Takashi Nakano; Takashi Saito
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Paper Abstract

The filter wheel (FW) is a system to reduce the counting rates on the X-ray Spectrometer (XRS) which is the main instrument onboard the ASTRO-E satellite. The FW system consists of a rotating filter disk, controlled by a stepper motor, and a driving electronics. The disk has one open hole, 2 Be filters with thicknesses of 100 and 300 micrometers , and 3 neutral density filters with transmissions of 5,10 and 25 percent. The neutral density filters are made of 200 micrometers thick Mo plates with 1802 pin holes. The filter positions are monitored with optical sensors. Performance verification and full environment test have been carried out for the flight model system. We describe the FW system and report on the results of x-ray calibration and other testings.

Paper Details

Date Published: 22 October 1999
PDF: 9 pages
Proc. SPIE 3765, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy X, (22 October 1999); doi: 10.1117/12.366547
Show Author Affiliations
Tae Furusho, Tokyo Metropolitan Univ. (Japan)
Noriko Y. Yamasaki, Tokyo Metropolitan Univ. (Japan)
Yoshitaka Ishisaki, Tokyo Metropolitan Univ. (Japan)
T. Toramatsu, Tokyo Metropolitan Univ. (Japan)
Takaya Ohashi, Tokyo Metropolitan Univ. (Japan)
Kazuhisa Mitsuda, Institute of Space and Astronautical Science (Japan)
Y. Ogawara, Institute of Space and Astronautical Science (Japan)
A. Fukatsu, NEC Corp. (Japan)
Takashi Nakano, NEC Corp. (Japan)
Takashi Saito, NEC Corp. (Japan)


Published in SPIE Proceedings Vol. 3765:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy X
Oswald H. W. Siegmund; Kathryn A. Flanagan, Editor(s)

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