Difference between revisions of "10-31-08 GEM HRRL Photon Runs"
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I see a second peak on ADC1D but it is at channels 100 and not 150. | I see a second peak on ADC1D but it is at channels 100 and not 150. | ||
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| + | Plugged in NaI on channel 1 of scope and saw a peak develop around channel 75. Did I just change a gorund and reduce the noise? | ||
[http://www.iac.isu.edu/mediawiki/index.php/GEM_HRRL_Photons Go back] | [http://www.iac.isu.edu/mediawiki/index.php/GEM_HRRL_Photons Go back] | ||
Revision as of 22:08, 31 October 2008
The Goal today is to observe position dependence of photons on the GEM detector
A1 -> 13
A2 -> 11
A3 -> Trig
A4 -> 2
A6 -> 16
A7 -> 8
A8 -> 5
A9 -> NaI -> B9
B1 -> ADC1A
Run 1
GEM Backgrnd.mpa
GEM HV : VDrif = 3850, VGem = 3550
HRRL : E = 14 MeV, I =0
5 minutes long
Run 2
Run2.mpa
GEM HV : VDrif = 3850, VGem = 3550
HRRL : E = 14 MeV, I =20mA
ADC 1D has clear second peak at channel 150 but ADC1 does not. Lets Observe ADC 1D as a function of position. This corresponds to GEM output strip 13.
5 minutes long
Run 3
Run3.mpa
GEM HV : VDrif = 3550, VGem = 3550
HRRL : E = 14 MeV, I =20mA
5 minutes long
I see a second peak on ADC1D but it is at channels 100 and not 150.
Plugged in NaI on channel 1 of scope and saw a peak develop around channel 75. Did I just change a gorund and reduce the noise?