Teller Light
5/31/2017
Run 6429 3 MeV 0.5 microsecond pulse width two toroids no Faraday cup PMT in cell 390 nm filter, HV = -1800, Shawn's mirror at 1 7/8 inches from downstream side of downstream toroid. PMT RMS/mean < 10%
Run 6430 Replaced 390 nm filter with 320 nm filter.
Run 6431 320 nm and 330 nm filters stacked.
Run 6432 Shawn's mirror on beam right which probes which part of the plume we are seeing moved to 18 inches. Still 320 + 330 nm filters in. Now just one planoconvex lens on accelerator side. Before we had two.
Run 6433 Now, just 320 nm filter in.
Run 6434. 390 nm filter in. ADC[5]/ADC[7] = 1.831
Run 6435. Beam right mirror moved to 5 feet. ADC[5]/ADC[7] = 1.55
Run 6436. 320 nm filter in.ADC[5]/ADC[7] = 1.765
We still have light from the extended plume getting to the PMT. We added some sewer pipe and black cloth to take care of this.
Run 6437. 329 filter in. Better optics to see just end of plume. Mirror 130.5 inches from toroid. ADC[5]/ADC[7] = 0.2176
Run 643 . Mirror now at 6.0 feet.