DSG HPGe - User Manual

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Maintenance check / pretest

Ge detectors may operate at bias voltages of 5000 V DC or more.

Always be sure that detectors are properly grounded (through the SHV

coaxial cable ground to a properly grounded Power Supply/NIM Bin).

Also use extreme caution when adjusting internal preamplifier controls to

avoid contact with the high voltage circuit.

Connect the Oscilloscope with a BNC cable or BNC T-fitting (picture 1)

on the main amplifier OUT (picture 2 - picture 4).

Picture 1 Picture 2 Picture 3 Picture 4

DSG Detector Systems GmbH * Robert-Bosch-Str. 38 * 55129 Mainz* GERMANY

phone: +49-6131-507530 * fax: +49-6131-507540 * email: info@detector-systems.de

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Summary

Handle detectors with bias voltages up to 5000V DC, ensure proper grounding, and use caution with high voltage circuits.

Ensure main amplifier settings for coarse gain are 100 and fine gain is 10.

Increase high voltage in 100V steps, measure the test point voltage, and observe/record noise on the scope.

Stop bias application when noise shakes or the test point (TP) voltage goes to high values (-10V or more).

Use specific gain, pileup, P/Z, BLR, and peaking time settings for non-DSG main amplifiers.

General