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25 April 2024 |
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Fine-pitch semiconductor detector for the FOXSI mission | | Shin-nosuke Ishikawa
; Shinya Saito
; Hiroyasu Tajima
; Takaaki Tanaka
; Shin Watanabe
; Hirokazu Odaka
; Taro Fukuyama
; Motohide Kokubun
; Tadayuki Takahashi
; Yukikatsu Terada
; Sam Krucker
; Steven Christe
; Steve McBride
; Lindsay Glesener
; | | Date: |
18 Sep 2015 | | Abstract: | The Focusing Optics X-ray Solar Imager (FOXSI) is a NASA sounding rocket
mission which will study particle acceleration and coronal heating on the Sun
through high sensitivity observations in the hard X-ray energy band (5-15 keV).
Combining high-resolution focusing X-ray optics and fine-pitch imaging sensors,
FOXSI will achieve superior sensitivity; two orders of magnitude better than
that of the RHESSI satellite. As the focal plane detector, a Double-sided Si
Strip Detector (DSSD) with a front-end ASIC (Application Specific Integrated
Circuit) will fulfill the scientific requirements of spatial and energy
resolution, low energy threshold and time resolution. We have designed and
fabricated a DSSD with a thickness of 500 {mu}m and a dimension of 9.6 mm x
9.6 mm, containing 128 strips with a pitch of 75 {mu}m, which corresponds to 8
arcsec at the focal length of 2 m. We also developed a low-noise ASIC specified
to FOXSI. The detector was successfully operated in the laboratory at a
temperature of -20 C and with an applied bias voltage of 300 V, and the energy
resolution of 430 eV at a 14 keV line was achieved. We also demonstrated
fine-pitch imaging successfully by obtaining a shadow image, hence the
implementation of scientific requirements was confirmed. | | Source: | arXiv, 1509.5717 | | Services: | Forum | Review | PDF | Favorites | |
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