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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].
| Run Number | Date | User | PMT | High Voltage | Experiment | Description and observations | Image |
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| 635 | 05/25/2012 | Marco | 09561 | -1.800 | PMT Scanning | Remove LED, insert another paper attenuator (working now with 2 layers), cut a piece of the blue rubber that protects the LED contacts (trying to make better contact). Increase pulse for pot high 10 (at +5V) and keep width 4 (at 15ns). Scanning with 10x10x1k. Reference PMT (Ref_635) really stable now! Two suspects: the LED must work with 5V for this very fast pulse (don`t know the resistor that is connected in series with it) or the bad contact was fixed. | Error creating thumbnail: Unable to save thumbnail to destination
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| 636 | 05/25/2012 | Marco | 09561 | -1.798 | PMT Scanning | Working in the same conditions of run #635. 100x100x1k scanning. Reference PMT signal: Ref_636. Color scale in number of photoelectrons (calibration in run #558). Now the LED is constant! It is important to say that the amount of light (using just two attenuator papers) is big. | Error creating thumbnail: Unable to save thumbnail to destination
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| 640 | 05/30/2012 | Nathaniel | 09561 | -1.700 | PMT Gain | I now am running similar tests to the gains tests in runs 556-563. However this time I am using Dark Box 1 instead of Dark Box 2. This will allow systematic error analysis. | Error creating thumbnail: Unable to save thumbnail to destination
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| 641 | 05/30/2012 | Nathaniel | 09561 | -1.798 | PMT Gain | Same deal as above. Just changing HV | Error creating thumbnail: Unable to save thumbnail to destination
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| 643 | 05/30/2012 | Nathaniel | 09561 | -1.897 | PMT Gain | Same deal as above. Just changing HV | Error creating thumbnail: Unable to save thumbnail to destination
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| 644 | 05/30/2012 | Nathaniel | 09561 | -1.999 | PMT Gain | Same deal as above. Just changing HV | Error creating thumbnail: Unable to save thumbnail to destination
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| 645 | 05/30/2012 | Nathaniel | 09561 | -2.099 | PMT Gain | Same deal as above. Just changing HV | Error creating thumbnail: Unable to save thumbnail to destination
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| 646 | 05/30/2012 | Nathaniel | 09561 | -2.199 | PMT Gain | Same deal as above. Just changing HV | Error creating thumbnail: Unable to save thumbnail to destination
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| 647 | 05/30/2012 | Nathaniel | 09561 | -2.300 | PMT Gain | Same deal as above. Just changing HV | Error creating thumbnail: Unable to save thumbnail to destination
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| - | 05/30/2012 | Nathaniel | 09561 | - | PMT Gain | Here is the Spreadsheet with all the Data and the plots. It appears that the 2 boxes are very close, they are within ~12% of each other. Not bad? | File:PMT Gain 1.xls |
| -- | 06/7/2012 | Nathaniel | 09561 | --- | PMT Gain | I have completed the full error analysis for the correction factor, the attenuation factor of DB1, and the two Gain measurements (one for DB1 and DB2). I have updated the two excel spreadsheets (PMT_Gain_1.xls and att_fac_darkbox1.xls) I have also used PAW to plot each gain vs HV, as well as both on the same plot fitted with the same line to show close correlation. | Error creating thumbnail: Unable to save thumbnail to destination
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| --- | 06/7/2012 | Nathaniel | 09561 | ---- | PMT Gain | Same deal as above. Just uploading other plots | Error creating thumbnail: Unable to save thumbnail to destination
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| --- | 06/7/2012 | Nathaniel | 09561 | ---- | PMT Gain | Same deal as above. Just uploading other plots (here is link to group meeting slides for 06/18 PRESENTATION.ppt also, here is the link to the PAW graphing script. NOTE: it requires a txt file of your data. Gain_graphing_tool.doc | Error creating thumbnail: Unable to save thumbnail to destination
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| 556-563 | 06/14/2012 | Lilly | 09561 | ---- | PMT Gain | Data analysis practice using previously obtained data super-imposed onto Nathaniel's previously analyzed data. | Error creating thumbnail: Unable to save thumbnail to destination
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| 4352 (JLab) | 06/22/2012 | Nathaniel | 09561 | 1900 | PMT Gain | In these tests I tested for Gain at JLab to see if it compared with CUA's results. One can notice the "noisy peak" that never moves but always appears after the pedestal. These tests ran from 1900-2300 volts, but could not go lower because this noisy peak swallowed the SEP. Gain plots will come soon too | Error creating thumbnail: Unable to save thumbnail to destination
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| 4351 (JLab) | 06/22/2012 | Nathaniel | 09561 | 2000 | PMT Gain | These are still the JLab tests. Different voltage | Error creating thumbnail: Unable to save thumbnail to destination
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| 4350 (JLab) | 06/22/2012 | Nathaniel | 09561 | 2100 | PMT Gain | These are still the JLab tests. Different voltage | Error creating thumbnail: Unable to save thumbnail to destination
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| 4348 (JLab) | 06/22/2012 | Nathaniel | 09561 | 2200 | PMT Gain | These are still the JLab tests. Different voltage | Error creating thumbnail: Unable to save thumbnail to destination
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| 4349 (JLab) | 06/22/2012 | Nathaniel | 09561 | 2300 | PMT Gain | These are still the JLab tests. Different voltage | Error creating thumbnail: Unable to save thumbnail to destination
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| (JLab) | 06/22/2012 | Nathaniel | 09561 | PMT Gain | These are still the JLab tests. plots with error bars | Error creating thumbnail: Unable to save thumbnail to destination
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| (JLab) | 06/22/2012 | Nathaniel | 09561 | PMT Gain | These are still the JLab tests. plot with all 3 (2 CUA and 1 JLab) | 
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| 802 | 06/28/2012 | Nathaniel | 60158 (HMS) | PMT Gain | These are Gain tests of the HMS and BLAST PMTs that we brought from JLab. One will notice that HMS PMT has extremely low gain. I fiddled around with LED, HV, Shielding, etc. I even tried 4 different bases. From what I can tell, it just has very low gain. I don't know that there are any JLab measurements to cross check. | Error creating thumbnail: Unable to save thumbnail to destination
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| 805 | 06/28/2012 | Nathaniel | 60158 (HMS) | PMT Gain | Continuation of above. Change in HV. | Error creating thumbnail: Unable to save thumbnail to destination
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| 806 | 06/28/2012 | Nathaniel | 60158 (HMS) | PMT Gain | Continuation of above. Change in HV. | Error creating thumbnail: Unable to save thumbnail to destination
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| 807 | 06/28/2012 | Nathaniel | 60158 (HMS) | PMT Gain | Continuation of above. Change in HV. | Error creating thumbnail: Unable to save thumbnail to destination
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| 808 | 06/28/2012 | Nathaniel | 60158 (HMS) | PMT Gain | Continuation of above. Change in HV. | Error creating thumbnail: Unable to save thumbnail to destination
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| 809 | 06/28/2012 | Nathaniel | 60158 (HMS) | PMT Gain | Continuation of above. Change in HV. | Error creating thumbnail: Unable to save thumbnail to destination
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| 810 | 06/28/2012 | Nathaniel | 60158 (HMS) | PMT Gain | Continuation of above. Change in HV. | Error creating thumbnail: Unable to save thumbnail to destination
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| 822 | 06/28/2012 | Nathaniel | 9577 (BLAST) | PMT Gain | Continuation of above. This is now the BLAST PMT. It was described as a "High Gain" PMT and it sure is! It has very high gain. Variations that I did in LED have convinced me that this is the SEP, but it is very high! The Gain results, documented in File:PMT Gain 1.xls , are very close to Kevin's results that are in File:PMTcatalog.xls | Error creating thumbnail: Unable to save thumbnail to destination
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| 823 | 06/28/2012 | Nathaniel | 9577 (BLAST) | PMT Gain | Continuation of above. Change in HV. | Error creating thumbnail: Unable to save thumbnail to destination
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| 824 | 06/28/2012 | Nathaniel | 9577 (BLAST) | PMT Gain | Continuation of above. Change in HV. | Error creating thumbnail: Unable to save thumbnail to destination
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| 825 | 06/28/2012 | Nathaniel | 9577 (BLAST) | PMT Gain | Continuation of above. Change in HV. | Error creating thumbnail: Unable to save thumbnail to destination
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| 826 | 06/28/2012 | Nathaniel | 9577 (BLAST) | PMT Gain | Continuation of above. Change in HV. | Error creating thumbnail: Unable to save thumbnail to destination
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| 827 | 06/28/2012 | Nathaniel | 9577 (BLAST) | PMT Gain | Continuation of above. Change in HV. | Error creating thumbnail: Unable to save thumbnail to destination
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| 828 | 06/28/2012 | Nathaniel | 9577 (BLAST) | PMT Gain | Continuation of above. Change in HV. | Error creating thumbnail: Unable to save thumbnail to destination
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| 832 | 07/02/2012 | Marco | S2M-2" | -1.802 | PMT Scanning | Checking the 10x10 scanning for the 2" PMT (reduced size) | Error creating thumbnail: Unable to save thumbnail to destination
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| 842 | 07/05/2012 | Nathaniel/Marco | 09577 (BLAST_High gain) | -1.799 (LeCroy) | PMT Scanning | Scanning the High Gain PMT model XP4500/B (rounded window) with the PMT_test_100x100_1k_v3_return.txt script. PMT approx. 3cm from the light collimator. Three office papers inside to attenuate the signal. Using shielding. Module for high voltage is the CAMAC crate one, LeCroy-2415. High voltage cable oriented toward entrance door. Values in number of photoelectrons. The reference PMT signal can be seen here: Ref_842.png. Gain@1.8kV=6.42e+07 (SEP-Ped)=40.67 from run #823. | Error creating thumbnail: Unable to save thumbnail to destination
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| 844 | 07/05/2012 | Nathaniel/Marco | 60158 (HMS) | -1.800 (LeCroy) | PMT Gain | Measuring gain for the next scanning. | File:844.png |
| 845 | 07/28/2012 | Nathaniel/Marco | 60158 (HMS) | -1.800 (LeCroy) | PMT Scanning | Same as run #842, changing the PMT. The LED intensity was also changed. Values in number of photoelectrons. Reference PMT signal: Ref_845.png. Gain@1.815kV=2.24e+06 (SEP-Ped)=1.42 from run #805. | Error creating thumbnail: Unable to save thumbnail to destination
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| 846 | 07/28/2012 | Nathaniel/Marco | 60158 (HMS) | -1.998 | PMT Scanning | Same as run #845, just changing HV. Values in number of photoelectrons. Reference PMT signal: Ref_846.png. Gain@2.015kV=4.10e+06 (SEP-Ped)=2.60 from run #807. CODA broke connection at the end of the scanning. | Error creating thumbnail: Unable to save thumbnail to destination
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| 856 | 07/05/2012 | Nathaniel/Marco | 60158 (HMS) | -1.821 | Quantum Efficiency | I am doing a run with the LED at a higher voltage (~3.5) in order to do a relative QE test. | Error creating thumbnail: Unable to save thumbnail to destination
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| 855 | 07/05/2012 | Nathaniel/Marco | 9577 (BLAST) | -1.821 | Quantum Efficiency | I am doing a run with the LED at a higher voltage (~3.5) in order to do a relative QE test. | Error creating thumbnail: Unable to save thumbnail to destination
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| 4607 | 07/11/2012 | Nathaniel/Laura/Rachel | 9560 (BLAST) | -1.8 | Prototype Testing (Cosmic) | Here is the JLab run for 5cm or 1.03, 80 ns gate, 2 kV (2 in), 1.8 kV (5 in), 17 hrs, scin sig = 50-60 mV, aero sig = 200-300 mV | Error creating thumbnail: Unable to save thumbnail to destination
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| 861 | 07/20/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | First run done at CUA. 5 cm aerogel. Total of 17 hours, 1980 events (CODA; 4515 according to counter). Notice events below the pedestal and very slow event rate | Error creating thumbnail: Unable to save thumbnail to destination
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| 862-872 | 07/20/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | Junk-aligning and setting up, checking pedestal position, etc. | |
| 873 | 07/20/2512 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | 5cm Aerogel | Error creating thumbnail: Unable to save thumbnail to destination
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| 874-78 | 07/26/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | setting up for 8cm runs | |
| 879 | 07/26/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | 8cm Aerogel, 17 hours, 2105 events | Error creating thumbnail: Unable to save thumbnail to destination
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| 880-86 | 07/20/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | Junk | |
| 887 | 07/20/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | Prototype empty, calculating SEP delta for dark-box set up | Error creating thumbnail: Unable to save thumbnail to destination
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| 888-895 | 07/20/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | Junk | |
| 896 | 07/20/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | Attempt to run 8cm Aerogel. Counter and CODA dissagreed by over 1000 counts, run stopped. | Error creating thumbnail: Unable to save thumbnail to destination
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| 897 | 07/20/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | 8 cm Aerogel run in the dark-box. Notice clear double pedestal/peak. | Error creating thumbnail: Unable to save thumbnail to destination
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| 903 | 07/31/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | 8 cm Aerogel run in the dark-box. Notice far fewer events below the pedestal, no double peak. | Error creating thumbnail: Unable to save thumbnail to destination
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| 905 | 08/02/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | 5 cm Aerogel run in the dark-box. Switched discriminators and coincidence unit. No events below pedestal. Notice that the delta is essentially the same as for 8cm of aerogel. | Error creating thumbnail: Unable to save thumbnail to destination
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| 906 | 08/02/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | 10 cm Aerogel run in the dark-box. Added more delay to aerogel PMT signal to have a better fit in coincidence gate. Overnight run. Tracker shows small flat peak ~200 channels from pedestal. Notice high concentration of events at overflow channel and small second peak | Error creating thumbnail: Unable to save thumbnail to destination
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| 907 | 08/03/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | 10 cm Aerogel run in the dark-box. Redoing above run to see if results change if the run time is much shorter (2 hours). Aerogel signal > 7volts. | Error creating thumbnail: Unable to save thumbnail to destination
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| 908 | 08/03/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | Same as above. Stable tracker pedestal. | Error creating thumbnail: Unable to save thumbnail to destination
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| 909 | 08/06/2012 | Laura | 9650 (BLAST) | -1.8 | Prototype Testing (Cosmic) | 10 cm Aerogel run in the dark-box. Using separate HV sources for aerogel PMT and gate PMTs. This is the first run of the series of 10-1cm of aerogel. Tracker histogram shows two small peaks about 125 and 200 channels away from pedestal. Npe~9.4 | Error creating thumbnail: Unable to save thumbnail to destination
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