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Ge:Ga Detector Performance Tests

Ge:Ga Detector Performance Tests. D. Rosenthal. Goal: Measurement of detector performance independent of CRE performance. Responsivity, NEP, and quantum efficiency measured in two test phases -> PACS-ME-TR-001, -003 Detector design,

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Ge:Ga Detector Performance Tests

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  1. Ge:Ga Detector Performance Tests D. Rosenthal Ge:Ga Detector Performance Tests

  2. Goal: Measurement of detector performance independent of CRE performance • Responsivity, NEP, and quantum efficiency measured • in two test phases -> PACS-ME-TR-001, -003 • Detector design, • i.e. detector material, light cones, and cavity design • verified by measurement of quantum efficiency Ge:Ga Detector Performance Tests

  3. TIA with thermally decoupled JFET (~ 50 K) used • cold black body (50–200 K), mesh filter (lcenter=190 mm, • FWHM=50 mm) Ge:Ga Detector Performance Tests

  4. Results • Measurement of responsivity, NEP and • quantum efficiency at • Pph=3x10-13, 1x10-12, and 3x10-12 W and • Tmodule= 1.8, 1.85, 1.9, and 1.93 K • Responsivity for 13 of 16 pixels of EM 6 • NEP and QE for 10 of 16 pixels of EM 6 Ge:Ga Detector Performance Tests

  5. responsivity uniform selection by room temperature resistance applicable Ge:Ga Detector Performance Tests

  6. Results of 22 individual measurements averaged • NEP background limited for bias > 30 mV • average quantum efficiency ~ 35% Ge:Ga Detector Performance Tests

  7. Conclusion average quantum efficiency of ~ 35% -> better than specification (>30%) -> verification of optical design (light cones, cavity), mechanical design (stressing mechanism), and detector material Ge:Ga Detector Performance Tests

  8. Ge:Ga Detector Performance Tests

  9. Ge:Ga Detector Performance Tests

  10. Ge:Ga Detector Performance Tests

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