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1st of year Checkout

1st of year Checkout. Power supply safety. Powering up detector(s) 1 st in the DARK Ramping up voltages slowly in 50 v steps 2. Look for signals 3. Check rates 4. Light leak tests. Oscilloscope “cheat sheets”. 5. Check rates in LIGHTS ON/LIGHTS OUT test 6. Threshold scans

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1st of year Checkout

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  1. 1st of year Checkout Power supply safety • Powering up detector(s) • 1st in the DARK • Ramping up voltages slowly in 50 v steps • 2. Look for signals • 3. Check rates • 4. Light leak tests Oscilloscope “cheat sheets”

  2. 5. Check rates in LIGHTS ON/LIGHTS OUT test 6. Threshold scans 7. Efficiency scans (plateauing)

  3. How to Correctly and Safely Use the CROP High Voltage Power Supply Supplying high voltage to the CROP detectors: Step 1: Make sure the power supply is turned OFF Step 2: Turn the blue knob on top of the supply (the potentiometer) counter-clockwise all the way (to reduce the voltage to zero) Step 3: Connect the detector(s) to the power supply (with the supply turned OFF) Step 4: Turn the power supply on Step 5: Slowly and gradually increase the voltage until you read the desired value on the display screen (take about 10 - 15 seconds to increase the voltage) You can change (increase or decrease) the voltage while the detectors are plugged in and the supply is turned on

  4. On-Line Oscilloscope Cheat Sheets

  5. Setting Discriminator Thresholds Events counted:

  6. Telescoping the Detectors

  7. Typical efficiency of counters 85% - 95%

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