GEM Leakage Current Measurement

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A Keithley picoammeter is used to measure the leakage current of a GEM foil

Unfortunately, the Keithley can be damaged if I sees a potential difference of 240 Volts or more.

The Circuit below is designed to protect the Keithley in case the GEM foil capacitor becomes a direct short during the measurement.

GEM LeakCurrent TestProtectionCircuit.png


Media:XfigFile4GEM_LeakCurrent_TestProtectionCircuit.txt

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