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 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 beampulse, 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

Jeffs_Analysis

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 647 . Line source. Two mirrors on optics table removed. Looking down throat of sewer pipe.

IAC_Experiments