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

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

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 4534

Now increase delay of fake stop to 800 ns

Terminator test

Terminators in

Discriminator at 20 mv

PMT detector #4 HV at -1000 Volts