Teller Light
run list
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 6438. Mirror now at 6.0 feet. ADC[5]/ADC[7] = 0.4202.
Run 6439. Mirror now at 7.5 inches.ADC[5]/ADC[7] = 0.8991
Run 6440. Looking at 18 inches. We changed several aspects of the optics. Board to block UV, no sewer pipe.
Run 6442. 0.5 usec wide beam pulse, 80 mA peak, 320 nm filter, Removed sewer pipe, installed wall to block direct light from plume, removed mirror in the plume and sent light through 2" hole in plywood 18 inches downstream of toroid., used light at PMT to align light back to the beam line., ADC[5]/ADC[7] = 6.0 +/- 0.7
Run 6443. changed filter to 390 nm. ADC[5]/ADC[7] = 5.3 +/- 0.9
Run 6444. inserted 320 + 330 nm. ADC[5]/ADC[7] = 0.2 +/- 0.02
Run 6445. inserted 320 nm. hole in plywood is 29.5 inches from toroid, image from a light placed at the Cell PMT makes an image on the plywood. The plywood hole is upstream of the center of that image. ADC[5]/ADC[7] = 4.2 +/- 0.6Run
6446. hole in plywood is 40 inches from toroid, inserted two mirrors, ADC[5]/ADC[7] = 3.5 +/- 0.4
6447. hole in plywood is 51.75 inches from toroid, ADC[5]/ADC[7] = 3.085+/- 0.4
6448. hole in plywood is 88.5 inches from toroid, ADC[5]/ADC[7] = 2.8 +/- 0.37
6449. Aluminum tape is placed over the hole in the plywood board. hole in plywood is 88.5 inches from toroid as before, ADC[5]/ADC[7] = 1.965+/- 0.282
6450. Black cloth placed over hole in wall on accelerator hall side. Aluminum tape still placed over the hole in the plywood board. hole in plywood is 88.5 inches from toroid as before, ADC[5]/ADC[7] = 0.331+/- 0.04
Signal is from the accelerator hall
6451. Labeled mirrors A,B,C,D according to path of light from the beam line to the cell. Mirror "B" is poly blocked between mirror B and C, brick is closest to B. Black cloth off of hole to shielded cell.A DC[5]/ADC[7] = 1 +/- 0.2
6452. Mirror "B" is poly blocked between mirror B and C. Inserted poly brick between Mirror A and mirror B, closest to mirror B. ADC[5]/ADC[7] = 0.9 +/- 0.2
6453. Unblock the hole in the plywood. Mirror "B" is poly blocked between mirror B and C. Inserted poly brick between Mirror A and mirror B, closest to mirror B. ADC[5]/ADC[7] = 0.86 +/- 0.14
6/2/2017
We put in lots of collimation with sewer pipes, etc.
Line source in, 320 nm filter in. HV at -1900V. Signal is -7 mV.
Go to -2001.4 V. Signal is -12 mV.
With light off (-2001.4 V), signal is +1 mV.
320 + 330 nm filters in. HV at -2001.4V. 0 mV.
Just 330 nm filter in. HV at -2000.6V. Signal is -11mV. I think this the line at 337 nm.
390 nm filter in. Voltage read back is 2000.6 V. Signal is -7.8 mV.
Run 6454 390 nm filter in. z position (distance of hole in plywood to ) is 86 1/8 inches. Hole in plywood blocked by tape. HV -2100 V. Toroid has two peaks.
Run 6455 As the last run ... 390 nm filter in. z position (distance of hole in plywood to ) is 86 1/8 inches. Hole in plywood blocked by tape. HV -2100 V. Toroid has one peak.
Run 6456 Tape taken off hole in plywood.
Run 6457 330 nm filter in.
Run 6458 330 and 320 nm filters in.
Run 6459 Just 320 nm filter in.
Run 6460 Hole in plywood at 35 1/4 inches. Line source in. No beam. Junk run.
Run 6461 no beam. line source.
DAQ crashed. Starting anew.
Run 6468. 4.8 mV on PMT with 320 nm filter. HV is 2100.
Run 6469 320 + 330 filters.
Run 6470 Junk. PMT not on.
Run 6471 Just 330 nm filter.
Run 6472 390 nm. [5]/[7]=1.136
Run 6473. Line source in. no RF.
Run 6474. Line source. Hole moved to 21 3/4. No beam. RF on.
Run 6475. Beam on, 390 nm filter.[5]/[7]=1.567
Run 6476. Same as last run, but hole in plywood blocked.[5]/[7]=0.175
Run 6477. z = 12 7/8 inches. Hole no longer blocked. Line source ON [5]/[7]= 32
Run 6478. z = 12 7/8 inches. Hole open. Beam ON [5]/[7]=1.69
Run 6479. Line source. Two mirrors on optics table removed. Looking down throat of sewer pipe. ADC pinned.
Run 6480 Amplifier on PMT changed from 1000 to 500. Line source. [5] = 3259
Run 6481 Beam on. Still amp at 500. [5]/[7] = 1.16
Run 6483. Hole blocked. [5]/[7] = 0.245
Run 6483, Hole unblocked. Pot of boiling water installed. [5]/[7] = 1.045
Run 6484, Line source. z = 102 3/4 inches. [5] = 1412
Run 6485, Beam on. [5]/[7] = 0.28
Run 6486, amp put back to 1000. Beam on. [5]/[7] = 0.39.
Run 6487, hole blocked on plywood. [5]/[7] = 0.359 (run not ended??)
Run 6488 line source. z = 62 1/2 inches[5] = 3620 Cut on event number.
Run 6489, Beam on, open hole [5]/[7] = 1.089 -- Put event number cut in data
Run 6490, Beam on, blocked hole, [5]/[7] = 0.90
Analysis
PMT linearity
Relative Fluorescence Yield