MainPage:Nuclear:KaonDetector:PMTCharacteristics:LogBook:pag05

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⇒ Go to Summer 2012 work page

LogBook on the CODA data acquisition, at CUA

Page (last), [6], 5, [4], [3], [2], [1].

LogBook - Page 05
Run Number Date User PMT High Voltage Experiment Description and observations Image
New HV module (VME CAEN V6533N) installed. Scan setup rechecked for bad contacts. Restarting scan project...
1224 10/01/2013 Marco Blast -1.800 (VME) Gain First test to analyze calibration. LED flashing with very low intensity at 1.075kHz. No SEP can be seen.
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1226 10/02/2013 Marco Blast -1.800 (VME) Gain Light intensity turned to zero (see only pedestal). File:1226.png
1227 10/02/2013 Marco Blast -1.800 (VME) Gain Low light intensity, but still too much.
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1228 10/02/2013 Marco Blast -1.800 (VME) Gain Even lower light intensity.
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1231 10/07/2013 Marco Blast -1.800 (VME) Scan Testing LED intensity to start scan run (LED in the center of PMT). File:1231.png
1232 10/07/2013 Marco Blast -1.800 (VME) Scan NO MU-METAL! Scan PMT with LED with pulse width 5 and intensity 7. We can conclude that (a) the PMT is not centralized, (b) the scan device got stuck at some point and (c) I forgot to put Mu-Metal shielding.
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1233 10/08/2013 Marco Blast -1.800 (VME) Gain Run to recheck PMT gain after scan. File:1233.png
1234 10/09/2013 Marco Blast -1.800 (VME) Scan Light intensity reajusted. Checking if it was okay, in the center of PMT. Changed a little light intensity after this check. File:1234.png
1238 10/09/2013 Marco Blast -1.800 (VME) Scan NO MU-METAL. Scan PMT with LED with pulse width 6 and intensity 7. No Mu-Metal, just checking if Scan device will get stuck again. Scan device still getting stuck. I changed the final x stop sensor, to see if it solves. Also put more oil on fuse.
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1240 10/10/2013 Marco Blast XP4500/B SN09620 -1.800 (VME) Gain MU-METAL INSERTED! Running calib again with LED in the center of PMT. 100ns of trigger window (from NIM quad-four fold logic unit); 6.5 pot pulse width, 6.0 pot pulse intensity (+5.0V).
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1241 10/10/2013 Marco Blast XP4500/B SN09620 -1.000 (VME) Gain Calib series, same config as run #1240. File:1241.png
1242 10/10/2013 Marco Blast XP4500/B SN09620 -1.100 (VME) Gain Calib series, same config as run #1240. File:1242.png
1243 10/10/2013 Marco Blast XP4500/B SN09620 -1.200 (VME) Gain Calib series, same config as run #1240. File:1243.png
1244 10/10/2013 Marco Blast XP4500/B SN09620 -1.300 (VME) Gain Calib series, same config as run #1240. File:1244.png
1245 10/10/2013 Marco Blast XP4500/B SN09620 -1.400 (VME) Gain Calib series, same config as run #1240. File:1245.png
1246 10/10/2013 Marco Blast XP4500/B SN09620 -1.500 (VME) Gain Calib series, same config as run #1240. File:1246.png
1247 10/10/2013 Marco Blast XP4500/B SN09620 -1.600 (VME) Gain Calib series, same config as run #1240. File:1247.png
1248 10/10/2013 Marco Blast XP4500/B SN09620 -1.700 (VME) Gain Calib series, same config as run #1240. File:1248.png
1249 10/10/2013 Marco Blast XP4500/B SN09620 -1.800 (VME) Gain Calib series, same config as run #1240.
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1250 10/10/2013 Marco Blast XP4500/B SN09620 -1.900 (VME) Gain Calib series, same config as run #1240. File:1250.png
1251 10/10/2013 Marco Blast XP4500/B SN09620 -2.000 (VME) Gain Calib series, same config as run #1240. File:1251.png
1252 10/10/2013 Marco Blast XP4500/B SN09620 -2.100 (VME) Gain Calib series, same config as run #1240. File:1252.png
1254 10/10/2013 Marco Blast XP4500/B SN09620 -1.800 (VME) Gain LED connection changed. Checking calibration.
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1264 10/10/2013 Marco Blast XP4500/B SN09620 -1.800 (VME) Scan Checked LED intensity with LED in the center of PMT, to start a scan with high number of PE. LED pot width = 6.0 and intensity = 7.1. File:1264.png
1266 10/10/2013 Marco Blast XP4500/B SN09620 -1.800 (VME) Scan Same conditions as run #1264, starting a scan. File:1266.png
1271 12/05/2013 Marco HMS (SN?) -1.800 (VME) Scan Test scan stability (10x10 scan). Removed T from the cable of LED pulser.
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1273 12/06/2013 Marco HMS (SN?) -1.800 (VME) Scan Test scan stability (10x10 scan). Inserted optical fiber at the end of the collimator (end of optical fiber is about 4mm from flat PMT window).
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1276 12/06/2013 Marco HMS (SN?) -1.800 (VME) Scan Test scan stability (10x10 scan with 10 points). Removed 2in reference PMT, but black paste around optical fiber and previous hole for reference PMT. It seems like I found the problem: a light leak from the optical fiber (or collimator). All the inserted paste is blocking now the leakage.
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1277 12/06/2013 Marco HMS (SN?) -1.800 (VME) Scan Test scan stability (100x100 scan with 30 points in each position). Optical fiber is about 4mm from flat PMT window.
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1278 12/09/2013 Marco HMS (SN?) -1.800 (VME) Scan Repeating run 1277, but with a range 2% lower. It is done to test if the end of course is making the horizontal motor to get stucked, the result was a change where it got stucked...
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1279 12/09/2013 Marco HMS (SN?) -1.800 (VME) Scan Repeating run 1278, but reducing the motor speed. It was 2600 for both and now it is 1300. Also put some oil on the spindle. This solution didn't fix the problem.
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1280 12/09/2013 Marco HMS (SN?) -1.800 (VME) Scan Trying to reduce even more the overall range (4% now). Scan a matrix of 300x300 with 15 points in each position. To avoid overheat, stopping the motors for 1min after each line is scanned.
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1285 12/12/2013 Marco HMS (SN?) -1.800 (VME) Scan Came back to 450 step size, 100x100 grid with 30 points in each position. But now moving the vertical motor much more than the horizontal one, so the setup is not getting stuck anymore!
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1383 02/04/2013 Marco HMS (SN?) -1.800 (VME) Scan 450 step size, 100x100 grid with 30 points in each position. Some unidentified problem happened.
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1385 02/04/2013 Marco HMS (SN?) -1.600 (VME) Scan 450 step size, 100x100 grid with 30 points in each position. Starting the weekly run.
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1386 02/06/2014 Marco HMS (SN?) -1.800 (VME) Scan Same as run 1385, just changing HV.
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1388 02/06/2014 Marco HMS (SN?) -2.000 (VME) Scan Same as run 1385, just changing HV.
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1390 02/06/2014 Marco HMS (SN?) -1.500 (VME) Scan Same as run 1385, just changing HV.
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1391 02/07/2014 Marco HMS (SN?) -1.900 (VME) Scan Same as run 1385, just changing HV. File:1391.png
1362 03/07/2014 Indra XP2282B -2.020 (VME) Integrating sphere,absorption length of aerogel Interaction of photon with absorbing material inside the integrating sphere. LED flashing with very low intensity at 1.001kHz. . File:1462.png
1369 03/07/2014 Indra XP2282B -2.020 (VME) Integrating sphere,absorption length of aerogel Interaction of photon with aerogel inside the integrating sphere. LED flashing with very low intensity at 1.001kHz. . File:1469.png
1370 03/07/2014 Indra XP2282B -2.020 (VME) Integrating sphere,absorption length of aerogel Empty integrating sphere. LED flashing with very low intensity at 1.001kHz. . File:1470.png
1371 03/07/2014 Indra XP2282B -2.020 (VME) Integrating sphere,absorption length of aerogel No LED flashing(dark) . File:1471.png
1502 04/02/2014 Indra XP2282B -1.750 (VME) Integrating sphere,absorption length of aerogel LED: on, Aerogel: absent . File:1502.png
1504 04/02/2014 Indra XP2282B -1.750 (VME) Integrating sphere,absorption length of aerogel LED: on, Aerogel: present . File:1504(1).png
1505 04/02/2014 Indra XP2282B -1.750 (VME) Integrating sphere,absorption length of aerogel LED : off, Aerogel present . File:1505.png