Difference between revisions of "Ionization Chamber"
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| − | The scope | + | The scope picture(100ns/div and 5 mv/div) below shows the Qweak GEM chamber's "TrigOut" pulse caused by a cosmic ionization event in the Qweak R1 detector. The "TrigOut" pulse represents electrons leaving the last GEM preamplifier stage and is therefore a positive going pulse. The high voltage was set to -3400 Volts on the cathode <math>(V_{Drift})</math> and -3100 Volts on the GEM foil voltage divider network <math>(V_{GEMFoil})</math> which powers all three GEM foil preamplifier stages. The chamber was filled with a gas mixture composed of 90% Argon and 10% Co2 by volume. |
[[Image:QweakTrigOut_Scope_and_Detector_3-04-09_1.jpg|300px]] | [[Image:QweakTrigOut_Scope_and_Detector_3-04-09_1.jpg|300px]] | ||
Revision as of 01:21, 8 April 2009
Qweak Chamber machining
Qweak_Chamber_Assembly
The scope picture(100ns/div and 5 mv/div) below shows the Qweak GEM chamber's "TrigOut" pulse caused by a cosmic ionization event in the Qweak R1 detector. The "TrigOut" pulse represents electrons leaving the last GEM preamplifier stage and is therefore a positive going pulse. The high voltage was set to -3400 Volts on the cathode and -3100 Volts on the GEM foil voltage divider network which powers all three GEM foil preamplifier stages. The chamber was filled with a gas mixture composed of 90% Argon and 10% Co2 by volume.
