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

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

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999spie.3765..664f&link_type=abstract

Proc. SPIE Vol. 3765, p. 664-672, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy X, Oswald H. Siegmund; Kathryn A. Flan

Astronomy and Astrophysics

Astronomy

1

Scientific paper

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.

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