Difference between revisions of "04-20-2015"
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(→r4534) |
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| Line 38: | Line 38: | ||
=Terminator test= | =Terminator test= | ||
| − | =Change discriminator threshold with terminators in= | + | ==Change discriminator threshold with terminators in== |
PMT detector #4 HV at -1000 Volts | PMT detector #4 HV at -1000 Volts | ||
Revision as of 17:50, 20 April 2015
Started testing detector 4 again.
Fake stop time
Discriminator width was decreased from 40 ns (255 on discriminator display) to 6.3 ns (10 on discriminator display)
Discriminator threshold is set to 100 mv
The delay for the fake stop is set to 800 ns
CODA/CODAreader/ROOT_V5.30/R1DC/evio2nt -fr4516.dat > /dev/null
R1DC->Draw("(evt.TDC1190[1][6]-evt.TDC1190[2][6])/10>>(4096,-4096,4096)");
Run 4536
Below is a picture of the typical 800 ns fake stop pulse that should appear as a second hit in the Multihit TDC.
Now decrease delay of fake stop to 400 ns
Terminator test
Change discriminator threshold with terminators in
PMT detector #4 HV at -1000 Volts
Run 4527 had a discriminator threshold set to 100 mv and the terminators were in.
Now change threshold to 50 mv
Terminators in
Discriminator at 20 mv