Difference between revisions of "MainPage:Nuclear:KaonDetector:PMTCharacteristics:LogBook:pag02"
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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 ([[:File:635_ref.png|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. || [[File:635.png|frameless]] | | 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 ([[:File:635_ref.png|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. || [[File:635.png|frameless]] | ||
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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: [[:File:636_ref.png|Ref_636]]. || [[File:636.png|frameless]] | + | | 636 || 05/25/2012 || Marco || 09561 || -1.798 || PMT Scanning || Working in the same conditions of run #635. 100x100x1k scanning. Reference PMT signal: [[:File:636_ref.png|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. || [[File:636.png|frameless]] |
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Revision as of 18:00, 25 May 2012
| ⇐ Back to the PMT Characteristics page |
LogBook on the CODA data acquisition, at CUA
Page 2, [1].
| Run Number | Date | User | PMT | High Voltage | Experiment | Description and observations | Image |
|---|---|---|---|---|---|---|---|
| 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
|
| 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
|
