04-9-2015

I did some TDC ring tests on Detector 4 by adding a 50 Ohm pass through terminator on the base of the top detector and another pass through terminator at the exit of the patch pannel

I needed recommission the DAQ TDC logic which seems to have become unplugged.

I added connectors so TDC1190[6] would have two hits separated by 400 ns

replay the data on daq2 with the command

CODA/CODAreader/ROOT_V5.30/R1DC/evio2nt -fr4516.dat > /dev/null

R1DC->Draw("(evt.TDC1190[1][3])");

R1DC->Draw("(evt.TDC1190[1][6]-evt.TDC1190[2][6])/10>>(4096,-4096,4096));

Both PMT HV were set to 1100 volts and the LED threshold was at 20 mV

run 4518 terminators in

Run 4518 had the bottom PMT of Detector 4 as the trigger and the terminators in.

The TOP PMT did not have mutliple peaks

R1DC->Draw("(evt.TDC1190[1][3]-evt.TDC1190[2][3])/10>>(4096,-4096,4096)");

R1DC->Draw("(evt.TDC1190[1][2]-evt.TDC1190[2][2])/10>>(4096,-4096,4096)"

Difference in time between to first and second hit in Detector 4's top PMT

run 4519 terminators out

Run 4519 had the bottom PMT of Detector 4 as the trigger and the terminators out.

The TOP PMT DID have mutliple peaks

2nCor_44#Run_Plan