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| ⇐ Back to the PMT Characteristics page |
| ⇒ 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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| 1589 | 07/03/2014 | Derek | XP4500/B 09641 | -1.700 (VME) | Scan | Testing the scanning method for large-diameter PMTs. Same setup as Marco's previous runs, -1.700 (VME), 100x100 steps in motor with 30 pulses at each step, 450 step size for 1.8 degree rotation. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1594 | 07/03/2014 | Derek | XP4500/B 09641 | -1.500 (VME) | Scan | Turned down HV and LED intensity while also rotating the PMT 180 degrees to see if the problems in 1989 were caused by the scanning method or the PMT. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1597 | 07/07/2014 | Derek/Marco | HMS | -1.700 (VME) | Scan | 100x100x30. Optical fiber removed. | Error creating thumbnail: Unable to save thumbnail to destination }
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| 1686 | 07/10/2014 | Derek/Marco | HMS | -1.700 (VME) | Scan | 25x25x30. Optical fiber removed. Collimator cleaned. White attenuation paper placed in front of LED in order to stabilize LED during pulses by allowing for greater intensity. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1691 | 07/10/2014 | Derek/Marco | HMS | -1.700 (VME) | Scan | 25x25x30. Paper removed, intensity decreased, rotated 90 degrees counter-clockwise | Error creating thumbnail: Unable to save thumbnail to destination
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| 1692 | 07/11/2014 | Derek/Marco | HMS | -1.700 (VME) | Scan | 25x25x30. Rotated 90 degrees counter-clockwise | Error creating thumbnail: Unable to save thumbnail to destination
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| 1696 | 07/11/2014 | Derek/Marco | HMS | -1.700 (VME) | Scan | 25x25x30. Rotated 90 degrees counter-clockwise. Replaced base 5B (Serial Number 806058) with base 101, More uniformity, but very low gains. Most likely due to the fact that the PMT was a couple of centimeters away when this scan took place. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1710 | 07/11/2014 | Derek/Marco | HMS | -1.700 (VME) | Scan | 25x25x30. Increased proximity of PMT to the LED and also increased the intensity of the LED, yielding near maxed out gains. Similar to the plots Marco produced last year. Promising for future tests. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1719 | 07/11/2014 | Derek/Marco | HMS | -1.700 (VME) | Scan | 100x100x30. Implemented attenuating paper into collimator design in order to stabilize the light emitted from the LED. Created a foam structure to keep the PMT in place and centered along the path of the LED scanner. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1736 | 07/15/2014 | Derek | XP4500/B | -1.700 (VME) | Scan | 100x100x30. Going back to XP4500/B after fixing the problems with the scanning setup. There was a bit of operator error here, as I accidentally stopped the scan prematurely, causing the line of 0's down the middle. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1816 | 07/18/2014 | Derek/Marco | R1584 | -1.500 (VME) | PMT Gain | Testing gain of PMT by using the minimum amount of LED intensity to get a signal from the PMT. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1817 | 07/18/2014 | Derek/Marco | R1584 | -1.800 (VME) | PMT Gain | Testing gain of PMT by using the minimum amount of LED intensity to get a signal from the PMT. I was unclear what the difference between the single electron peak and the mean of the data was. Also, Excel does not have a Gaussian fit function, so essentially I had to fit it by eye, which may not be accurate enough for UVa's taste. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1821 | 07/18/2014 | Derek/Marco | R1584 | -1.800 (VME) | Scan | 100x100x30. First scan of UVA PMT after receiving the base from J-Lab. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1822 | 07/22/2014 | Derek/Marco | R1584 | -1.800 (VME) | Scan | 100x100x30. Second scan of UVA PMT after receiving the base from J-Lab. Rotated 180 degrees from 1821. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1870 | 07/28/2014 | Alex | XP4500 | -1.800 (VME) | Gain | Tested with Alex's apparatus for testing scattering length. XP4500/B | Error creating thumbnail: Unable to save thumbnail to destination
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| 1902 | 08/01/2014 | Derek | R1584 | -1.800 (VME) | Scan | Higher intensity scan of UVA PMT. Returned similar results to previous scans. No rotation. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1902 | 08/04/2014 | Derek | XP4500 | -1.800 (VME) | Scan | Plot horizontal face of PMT in terms of the central position being a value of 1. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1902 | 08/04/2014 | Derek | R1584 | -1.800 (VME) | Scan | Plotted vertical face of PMT in terms of central position being one. Collection efficiency plot. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1947 | 08/07/2014 | Derek | R1584 | -1.800 (VME) | Scan | Another scan of R1584, this time with oil to get rid of motor sticking. Also found a ruler hindering complete range on the horizontal axis. | Error creating thumbnail: Unable to save thumbnail to destination
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| 1948 | 08/08/2014 | Derek | XP4500 | -1.800 (VME) | Gain | Gain test for XP4500 | Error creating thumbnail: Unable to save thumbnail to destination
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