Log term testJohan M., Vito P.16/12/2013

Setup

1 SRB (4chs)

MPOD

30 COVERs

The TestThe test consists to repeat every

minute a noise scan over 24h. HV on but no active gas

The TestThe test consists to repeat every

minute a noise scan over 24h. HV on but no active gas

Noise Scan ResultsIn order to study the behavior of our electronics in time we ar computing the weighted mean and sigma of each channel versus the time.

Noise Scan Results (Sigmas)

Noise Scan Results (Means)

Noise Scan ResultsIn order to study the behavior of our electronics in time we are computing the weighted mean and sigma of each channel versus the time. The mean variation is less than 1mV over 24h (no temperature or humidity monitoring).

Noise Scan ResultsIn order to study the behavior of our electronics in time we ar computing the weighted mean and sigma of each channel versus the time. The mean variation is less than 1mV over 24h (no temperature or humidity monitoring). Few (~8/~1800) runs are clearly deviating from the collective behavior, but inspecting them…

“Failing” Noise Scans

“Failing” Noise Scans

“Failing” Noise Scans

Future Plans The long term test we performed up

to now does not suggest problems in our apparatus.

Possible external sources of noise have been found (to be confirmed).

Possible baseline variations.The apparatus Johan prepared for the

test is ready to be extensively used. A fully comprehensive test will be

performed from January.