Filter wheel system for the x-ray microcalorimeters on board ASTRO-E

Tae Furusho; Noriko Y. Yamasaki; Yoshitaka Ishisaki; T. Toramatsu; Takaya Ohashi; Kazuhisa Mitsuda; Y. Ogawara; A. Fukatsu; Takashi Nakano; Takashi Saito

doi:10.1117/12.366547

22 October 1999 Filter wheel system for the x-ray microcalorimeters on board ASTRO-E

Tae Furusho, Noriko Y. Yamasaki, Yoshitaka Ishisaki, T. Toramatsu, Takaya Ohashi, Kazuhisa Mitsuda, Y. Ogawara, A. Fukatsu, Takashi Nakano, Takashi Saito

Author Affiliations +

Proceedings Volume 3765, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy X; (1999) https://doi.org/10.1117/12.366547
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

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.

Citation Download Citation

Tae Furusho, Noriko Y. Yamasaki, Yoshitaka Ishisaki, T. Toramatsu, Takaya Ohashi, Kazuhisa Mitsuda, Y. Ogawara, A. Fukatsu, Takashi Nakano, and Takashi Saito "Filter wheel system for the x-ray microcalorimeters on board ASTRO-E", Proc. SPIE 3765, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy X, (22 October 1999); https://doi.org/10.1117/12.366547

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