The transient gamma-ray spectrometer

Details The transient gamma-ray spectrometer The transient gamma-ray spectrometer

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991itns...38..559o&link_type=abstract

(1990 Nuclear Science Symposium, Arlington, VA, Oct. 23-26, 1990, Proceedings. A91-42475 17-35) IEEE Transactions on Nuclear Sci

Astronomy and Astrophysics

Astronomy

12

Cosmic Rays, Gamma Ray Astronomy, Gamma Ray Bursts, Gamma Ray Spectrometers, Spacecraft Instruments, Cryogenic Equipment, Germanium, N-Type Semiconductors, Spectral Resolution

Scientific paper

The authors describe the Transient Gamma-Ray Spectrometer (TGRS) to be flown onboard the WIND spacecraft. This instrument is designed to detect cosmic gamma-ray bursts over the energy range of 20 keV to 10 MeV with an expected spectroscopic resolution of 2 keV at 1 MeV (E/Delta-E = 500). The active detection element is a 215-cu cm high-purity n-type Ge crystal cooled to cryogenic temperatures by a passive radiative cooler. The geometric field of view (FOV) defined by the cooler is 170 deg FWFM. Burst data are stored directly in an onboard 2.75-Mb burst memory with an absolute timing accuracy of +/-1.5 ms. This capacity is sufficient to store the entire spectral data set of all but the largest bursts. In addition to burst measurements, the instrument will also study solar flares, search for possible diffuse background lines, and monitor the 511-keV positron annihilation radiation from the galactic center. The experiment is scheduled to be launched on a Delta II launch vehicle from Cape Canaveral on December 31, 1992.

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