Properties of CdZnTe detectors in the Burst Alert Telescope (BAT) Array

Goro Sato; Tadayuki Takahashi; Kazuhiro Nakazawa; Shin Watanabe; Makoto Tashiro; Masaya Suzuki; Yuu Okada; Hiromitsu Takahashi; Ann Parsons; Jack Tueller; Hans Krimn; Scott Barthelmy; Jay Cummings; Craig Markwardt; Derek Hullinger; Neil Gehrels; Ed Fenimore; David Palmer; Tony Dean; Dave Willis

Properties of CdZnTe detectors in the Burst Alert Telescope (BAT) Array

Goro Sato, Tadayuki Takahashi, Kazuhiro Nakazawa, Shin Watanabe, Makoto Tashiro, Masaya Suzuki, Yuu Okada, Hiromitsu Takahashi, Ann Parsons, Jack Tueller, Hans Krimn, Scott Barthelmy, Jay Cummings, Craig Markwardt, Derek Hullinger, Neil Gehrels, Ed Fenimore, David Palmer, Tony Dean, Dave Willis

Waseda Research Institute for Science and Engineering

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

The properties of 32k CdZnTe detectors have been studied in the pre-flight calibration of Burst Alert Telescope (BAT) on-board the Swift Gamma-ray Burst Explorer (scheduled for launch in January 2004). After corrections of the linearity and the gain, the energy resolution of summed spectrum is 7.0 keV (FWHM) at 122 keV. In order to construct response matrices for the BAT instrument, we extracted mobility-lifetime (μτ) products for electrons and holes in the CdZnTe. Based on a new method applied to ⁵⁷Co spectra taken at different bias voltages, μτ for electrons ranges from 5.0×10^-4 to 1.0×10^-2cm²V ^-1, while μτ for holes ranges from 1.0 × 10^-5 to 1.7 × 10^-4cm²V^-1. We show that the distortion of the spectrum and the peak efficiency of the BAT instrument are well reproduced by the μτ database constructed in the calibration.

Original language	English
Pages (from-to)	209-216
Number of pages	8
Journal	Unknown Journal
Volume	5198
Publication status	Published - 2004

Keywords

μτ products
BAT
CdZnTe
Lifetime
Mobility
Swift

ASJC Scopus subject areas

Electrical and Electronic Engineering
Condensed Matter Physics

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Sato, G., Takahashi, T., Nakazawa, K., Watanabe, S., Tashiro, M., Suzuki, M., Okada, Y., Takahashi, H., Parsons, A., Tueller, J., Krimn, H., Barthelmy, S., Cummings, J., Markwardt, C., Hullinger, D., Gehrels, N., Fenimore, E., Palmer, D., Dean, T., & Willis, D. (2004). Properties of CdZnTe detectors in the Burst Alert Telescope (BAT) Array. Unknown Journal, 5198, 209-216.

Properties of CdZnTe detectors in the Burst Alert Telescope (BAT) Array. / Sato, Goro; Takahashi, Tadayuki; Nakazawa, Kazuhiro; Watanabe, Shin; Tashiro, Makoto; Suzuki, Masaya; Okada, Yuu; Takahashi, Hiromitsu; Parsons, Ann; Tueller, Jack; Krimn, Hans; Barthelmy, Scott; Cummings, Jay; Markwardt, Craig; Hullinger, Derek; Gehrels, Neil; Fenimore, Ed; Palmer, David; Dean, Tony; Willis, Dave.

In: Unknown Journal, Vol. 5198, 2004, p. 209-216.

Research output: Contribution to journal › Article

Sato, Goro ; Takahashi, Tadayuki ; Nakazawa, Kazuhiro ; Watanabe, Shin ; Tashiro, Makoto ; Suzuki, Masaya ; Okada, Yuu ; Takahashi, Hiromitsu ; Parsons, Ann ; Tueller, Jack ; Krimn, Hans ; Barthelmy, Scott ; Cummings, Jay ; Markwardt, Craig ; Hullinger, Derek ; Gehrels, Neil ; Fenimore, Ed ; Palmer, David ; Dean, Tony ; Willis, Dave. / Properties of CdZnTe detectors in the Burst Alert Telescope (BAT) Array. In: Unknown Journal. 2004 ; Vol. 5198. pp. 209-216.

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abstract = "The properties of 32k CdZnTe detectors have been studied in the pre-flight calibration of Burst Alert Telescope (BAT) on-board the Swift Gamma-ray Burst Explorer (scheduled for launch in January 2004). After corrections of the linearity and the gain, the energy resolution of summed spectrum is 7.0 keV (FWHM) at 122 keV. In order to construct response matrices for the BAT instrument, we extracted mobility-lifetime (μτ) products for electrons and holes in the CdZnTe. Based on a new method applied to 57Co spectra taken at different bias voltages, μτ for electrons ranges from 5.0×10-4 to 1.0×10-2cm2V -1, while μτ for holes ranges from 1.0 × 10-5 to 1.7 × 10-4cm2V-1. We show that the distortion of the spectrum and the peak efficiency of the BAT instrument are well reproduced by the μτ database constructed in the calibration.",

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AU - Tashiro, Makoto

AU - Suzuki, Masaya

AU - Okada, Yuu

AU - Takahashi, Hiromitsu

AU - Parsons, Ann

AU - Tueller, Jack

AU - Krimn, Hans

AU - Barthelmy, Scott

AU - Cummings, Jay

AU - Markwardt, Craig

AU - Hullinger, Derek

AU - Gehrels, Neil

AU - Fenimore, Ed

AU - Palmer, David

AU - Dean, Tony

AU - Willis, Dave

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N2 - The properties of 32k CdZnTe detectors have been studied in the pre-flight calibration of Burst Alert Telescope (BAT) on-board the Swift Gamma-ray Burst Explorer (scheduled for launch in January 2004). After corrections of the linearity and the gain, the energy resolution of summed spectrum is 7.0 keV (FWHM) at 122 keV. In order to construct response matrices for the BAT instrument, we extracted mobility-lifetime (μτ) products for electrons and holes in the CdZnTe. Based on a new method applied to 57Co spectra taken at different bias voltages, μτ for electrons ranges from 5.0×10-4 to 1.0×10-2cm2V -1, while μτ for holes ranges from 1.0 × 10-5 to 1.7 × 10-4cm2V-1. We show that the distortion of the spectrum and the peak efficiency of the BAT instrument are well reproduced by the μτ database constructed in the calibration.

AB - The properties of 32k CdZnTe detectors have been studied in the pre-flight calibration of Burst Alert Telescope (BAT) on-board the Swift Gamma-ray Burst Explorer (scheduled for launch in January 2004). After corrections of the linearity and the gain, the energy resolution of summed spectrum is 7.0 keV (FWHM) at 122 keV. In order to construct response matrices for the BAT instrument, we extracted mobility-lifetime (μτ) products for electrons and holes in the CdZnTe. Based on a new method applied to 57Co spectra taken at different bias voltages, μτ for electrons ranges from 5.0×10-4 to 1.0×10-2cm2V -1, while μτ for holes ranges from 1.0 × 10-5 to 1.7 × 10-4cm2V-1. We show that the distortion of the spectrum and the peak efficiency of the BAT instrument are well reproduced by the μτ database constructed in the calibration.

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KW - CdZnTe

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KW - Mobility

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