tau status 14/2/2012. temperature behavior in red delayed response no a/c t=24-25 c 19 o c cold a/c...
TRANSCRIPT
TAU status
14/2/2012
Temperature behavior in redDelayed response
No A/CT=24-25 C
19oC Cold A/CT=19-20 C
30oC Hot A/CT=28-32 C
16:30
18:0004:00
02:00
CH 7
Panel setup: •Ni-Ni panel •CF4•600Torr•6High Voltage lines •10 Read-Out lines, with attenuators. •1830 V
# hits/ 30 mins
Sec
PDP hits /channel
Temperature behaviorPanel setup: •Ni-SnO2 panel •MDT gas: Ar-Co2
•600Torr•6High Voltage lines •10 Read-Out lines, with attenuators. •980 V •Source with collimator above RO lines 2,3,4
Some problematic channels, not electronics issue.Could be due to bad connections in the RO card ? However, these are less relevant to the measurement
PDP hits /channel
Temperature behavior
13:00 reach stable temp
The drop in rate starts at ~13:00. (black line )
Each red line is 24 hours.Start at 10:30 am
No response to changes in temperature after the first increase in temperature.
CH2
Usual behavior
# hits/ 30 mins
Sec
PDP hits /channel
hours
Temp
19oC Cold A/CT=19-20 C
30oC Hot A/CT=28-32 C
Temperature Control
Problem with Temperature control .Two A/C . •The left rise A/C #1 – located in the other side of the room relative to the temp sensor - but stopped working. •The right drop A/C #2 - close to the Temperature sensor – not a reliable measurement.
More “scientific “ method is needed to control the temperature . In order to perform more accurate measurements.
In any case strange behavior of the detector. Rate declines with time.
12/2/12Mid-day
9/2/1212/2/12Mid-day
The hypothesis
• Paschen's curveTemp decrease , so does the pressure.
Breaking Voltage is lowered, so with the same HV and lower temperature we expect to have higher rate.
Test Beam preparations • Online monitoring • Server-client output. • Multi-threaded readout:
– for plotting histograms quickly. – receive PDP output.
Individual CH selection
A few simple drawing options