Proportional Counter Array (PCA)
The PCA is an array of five proportional counters with a total
collecting area of 6500 square cm. The instrumental properties are:
- Energy range: 2 - 60 keV
- Energy resolution: < 18% at 6 keV
- Time resolution: 1 microsec
- Spatial resolution: collimator with 1 degree FWHM
- Detectors: 5 proportional counters
- Collecting area: 6500 square cm
- Layers: 1 Propane veto; 3 Xenon, each split into two; 1 Xenon veto layer
- Sensitivity: 0.1 mCrab
- Background: 2 mCrab
Events detected by the PCA will be processed on board by the
EDS before insertion into the telemetry stream.
The PCA is being built by the LHEA at GSFC. The principal investigator is
Dr. Jean H. Swank.
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