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Plasma Panel Sensor – Tel-Aviv
September 27 2012
The Tel-Aviv University team
• Professor Erez Etzion• Dr. Yan Ben-Hammou• Meny Ben-Moshe• Nir Guttman• Yiftah Silver
•15 years of detectors R&D for High energy physics and the LHC•Testing the TGCs for the ATLAS experiment •Testing and developing the STGC for the ATLAS upgrade
The lab is currently under construction, moving into a bigger room to better accommodate the test-bench, gas system, electronics etc.
9/27/2012 Tel Aviv University
Tel Aviv University 4
Experiment setup
9/27/2012
Each RO line is X100 Attenuated and 100Ω terminated
10 μm position precision of collimated source
Discriminator
10 RO lines
VME V560counter
HV line quenched with 20MΩ connected to a 1MΩ /100MΩ voltage divider
5
Source position
9/27/2012
Source sits here
1cm thick, Delrin collimator, with a 3 mm slit opening
Tel Aviv University
6
14 hour measurement
• collimated Source was left on the same position (above RO channel 7) for ~14 hours.
9/27/2012 Tel Aviv University
79/27/2012
Each histogram shows the ratio between each channel and the channel beneath the source (7).
hour
ratio
1 2 3 4
5 6 7 8
9 10
Tel Aviv University
8
Position scan
• Each full turn of the micrometer moves the source by 1mm
• Started the scan when the micrometer read is 60mm• Made 16 measurements each of 5minutes and 1mm
apart. • CF4 gas, 600 Torr, 2316V .
9/27/2012 Tel Aviv University
TAU - status report 99/7/2011
49mm 50mm 51mm 52mm
53mm 54mm 55mm 56mm
60mm 59mm 58mm 57mm
cpm
Channel
9/27/2012
10
Source position measurement
9/27/2012
• points in this graph are the Gaussian fit results
• Errors are σ/√(n-1)• Numbers in the x-axis
have no global meaning, simply the read of the micrometer and not the distance from any real point in space…
• The electrode pitch in this panel (10 electrodes per inch) is the slope of this line: 0.4 electrodes per mm…
Tel Aviv University
signal processing
• Measuring the pulse as a function of HV line number.
RO
85 24105 55
Volts
Time
Panel
HV
9/27/2012 Tel Aviv University