04-20-2015

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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


FakeStop 4-20-2015 A.png


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

R4536FakeStop C.png



Now decrease delay of fake stop to 400 ns

200 px


Below is a picture of the typical 400 ns fake stop pulse that should appear as a second hit in the Multihit TDC.


FakeStop 4-20-2015 B.png

Terminator test

r4534

Terminators in

Discriminator at 20 mv

PMT detector #4 HV at -1000 Volts


2nCor_44#Run_Plan