1st of year Checkout 1.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.

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Presentation transcript:

1st of year Checkout 1.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 Power supply safety Oscilloscope “cheat sheets”

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

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 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 How to Correctly and Safely Use the CROP High Voltage Power Supply

On-Line Oscilloscope Cheat Sheets

Setting Discriminator Thresholds Events counted:

Telescoping the Detectors

Typical efficiency of counters 85% - 95%

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