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CZT Imager for ASTROSAT CONFIGURATION

CZT Imager for ASTROSAT CONFIGURATION. CZT Module. Imarad CZT + Ideas ASIC. 1 microsec; Isolation; fast ADC; FPGA. 256 ampli. (ASIC). LabView; Analysis. Open issues… (a `to do’ list:). Space qualification of components: CZT module; Opto-isolator;

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CZT Imager for ASTROSAT CONFIGURATION

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  1. CZT Imager forASTROSAT CONFIGURATION

  2. CZT Module

  3. Imarad CZT + Ideas ASIC 1 microsec; Isolation; fast ADC; FPGA 256 ampli. (ASIC) LabView; Analysis

  4. Open issues… (a `to do’ list:) • Space qualification of components: CZT module; Opto-isolator; CPM (CsI + photo-diode) • CZT procurement • Establishing collimator/ CAM methodology • Background modeling • CsI/ PMT qualification • Power/ weight

  5. CZT procurement… • Next 4 months: Structural analysis of a module Replicate electronics (Detector board; amplifier; FE electronics) Temperature test Procure different configuration modules (same ASIC; different detectors) Generate qualification document • 5 – 8 months Proceed with qualification and choose Generate RFP • 9 – 12 months Procure additional modules for lab model • 13 – 18 months Procure flight modules

  6. Background Reduction New “Phoswich” combination ….

  7. Expected Count rates (per second; per quadrant)

  8. Design considerations • Active Compton Background rejection • Simple shield – minimize mass • Collimator to reduce DCXRB • Quadrant-wise • Cooling requirements

  9. Major components • CZT detectors • CsI(Tl) – anticoincidence • Collimator/ Coded Aperture Mask • Alha-tagged source • Data handling system

  10. Specifications…

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