MiniDC PreampOutput 10 10 07

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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.


MINIDC Sense-Preamp Output 10-10-07 SenseTrig1.jpg MINIDC Sense-Preamp Output 10-10-07 SenseTrig2.jpg MINIDC Sense-Preamp Output 10-10-07 SenseTrig3.jpg MINIDC Sense-Preamp Output 10-10-07 SenseTrig4.jpg MINIDC Sense-Preamp Output 10-10-07 SenseTrig5.jpg

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.


Back to Mini prototype page


MINIDC Sense-Preamp Output 10-10-07 AmpTrig1.jpg MINIDC Sense-Preamp Output 10-10-07 AmpTrig2.jpg MINIDC Sense-Preamp Output 10-10-07 AmpTrig3.jpg MINIDC Sense-Preamp Output 10-10-07 AmpTrig4.jpg

MINIDC Sense-Preamp Output 10-10-07 AmpTrig5.jpg MINIDC Sense-Preamp Output 10-10-07 AmpTrig6.jpg MINIDC Sense-Preamp Output 10-10-07 AmpTrig7.jpg MINIDC Sense-Preamp Output 10-10-07 AmpTrig8.jpg

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