Ay 191 Experiment Development of Hard X-ray Imaging Detectors J. Hong and J. Grindlay • Hard X-rays (~10-600 keV) are direct probes of black holes: GRBs, AGNs, Stellar BHs, etc. • Direct imaging possible only for narrow FoV (<~0.1º) and only for low energies (<~100 keV) => coded- aperture telescope • Harvard balloon-borne telescope (ProtoEXIST) is a coded-aperture telescope for wide-field (~20ºx20º) hard X-ray imaging and is a prototype platform for development of the scanning telescope needed for a major NASA mission, EXIST, to conduct a very sensitive all-sky survey for BHs
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Ay 191 Experiment Development of Hard X-ray Imaging Detectors J. Hong and J. Grindlay
Ay 191 Experiment Development of Hard X-ray Imaging Detectors J. Hong and J. Grindlay Hard X-rays (~10-600 keV) are direct probes of black holes : GRBs, AGNs, Stellar BHs, etc. - PowerPoint PPT Presentation
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Ay 191 Experiment Development of Hard X-ray Imaging Detectors
J. Hong and J. Grindlay
• Hard X-rays (~10-600 keV) are direct probes of black holes: GRBs, AGNs, Stellar BHs, etc.
• Direct imaging possible only for narrow FoV (<~0.1º) and only for low energies (<~100 keV) => coded-aperture telescope
• Harvard balloon-borne telescope (ProtoEXIST) is a coded-aperture telescope for wide-field (~20ºx20º) hard X-ray imaging and is a prototype platform for development of the
scanning telescope needed for a major NASA mission,
EXIST, to conduct a very sensitive all-sky survey for BHs
Coded-Aperture Hard X-ray Imaging Telescope
Decoding Shadowgram allows wide-field imaging.
Position-sensitive hard X-raydetectors needed: Use Cd-Zn-Te (CZT) arrays.
Cd-Zn-Te (CZT) Hard X-ray imaging detector
CZT Detectors 8 x 8 pixels on each 20 x 20mmCZT crystal (pixels on bottom)