MiniDC PreampOutput 10 10 07

Drift chamber High voltage settings

HV settings
Wire	Volts
Sense	1800
Field	-800
Guard	800

I should have set the Field and Guard wires to 900 volts according to Mac's e-mail reporting his Garfield simulation results. Next time.

Scope pictures triggering on sense wire C2

I set the scope threshold to below -14 mV based on previous measurements.

Scope pictures triggering on preamp output (pin 2)

I found that a trigger threshold of -100 mV discriminated well between noise and pulses consistent with previous ionization events.

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