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Irradiated Detector Update

Irradiated Detector Update. Nicholas Ptak 2/19/2011. The updates since the last meeting include Room temperature measurements W18-BZ2 W18-BZ4D W50-BZ4A at -10C and again at the neighboring strip W99-BZ1 nonirradiated –10C compared with room temperature.

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Irradiated Detector Update

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  1. Irradiated Detector Update Nicholas Ptak 2/19/2011

  2. The updates since the last meeting include • Room temperature measurements • W18-BZ2 • W18-BZ4D • W50-BZ4A at -10C and again at the neighboring strip • W99-BZ1 nonirradiated –10C compared with room temperature

  3. Room Temperature MeasurementsW18-BZ2 • The room temperature test was shown to have a lower current and higher Rpt by about 50kOhms at the higher vbias

  4. Room Temperature MeasurementsW18-BZ4D • This test stopped at 125vbias because the current shown on the voltage supply was exponentially increasing to 0.1mA, however in retrospect the test should have been completed • Here again the room temperature test had the lower current and higher Rpt, in this case by about 20kOhms

  5. The detector was tested twice, the first time on a strip with the farside DC pad closer to the bias ring, and the second time on a neighboring pad with the smaller strip area close to the bias ring. The neighboring strip gave a slightly higher Rpt near W50-BZ4ALaser Far

  6. W99-BZ1 nonirradiated-10C vs RT Laser Far • There is a difference in Rpt at 50vbias by about 50kOhms, however closer to 200v the two are comparable

  7. Planned Measurements • The list so far of measurements to be done include • W50-BZ4A at -15C, -5C, 0C, and 25C (irradiated) • W99-BZ1 at -15C, -10C, -5C, 0C, and 25C (irradiated and non-irradiated)

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