The HEXTE was designed, built and tested at the Center for Astrophysics & Space Sciences, at the University of California, San Diego, where the HEXTE Principal Investigator is Dr. Richard Rothschild.
[CEU] [Shields] [Phoswich Detector Assemblies] [Rocking Mechanism]
Photographs: top view
Characteristic | Value |
---|---|
Energy range | 12-250 keV in 256 channels |
Energy resolution | dE/E ~ E-0.5; =15% at 60 keV |
Time sampling | 7.6 µs (maximum) |
Field-of-view | 2.2° FWZI (FWHM response=1°) |
Detector material | NaI(Tl), CsI(Na) |
Net detector area | 2 × 890 cm² |
Live-time fraction on-source | 60% |
Count rate from Crab Nebula (12-250 keV) | 250 count/s per cluster |
Count rate from internal background (12-250 keV) | 90 count/s per cluster |
Detection sensitivity in 105 s, 3sigma | 10-6 photons/cm2 s keV at 100 keV |
Source/background dwell time | 16 to 128 s |
Calibration source | 241Am (lines at 17 and 60 keV) |
Gain variation | <1% |
Detector operating temperature | 17-27 °C |
Weight | 390 kg |
Operational power | 45 W |
Allocated telemetry rate | 5000 bit/s (average) |
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