Difference between revisions of "TOF HV SCAN FALL 2019"
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(Created page with "HV SCAN OF TOF PMTS * Beam conditions: 180nA e-beam on 3.10^4 Al radiator * start with 1150V for all PMTs * take data at each HV settings for about 20 files * HV steps: +/- 2...") |
(→HV SCAN OF TOF PMTS winter 2023) |
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| − | HV SCAN OF TOF PMTS | + | == HV SCAN OF TOF PMTS == |
* Beam conditions: 180nA e-beam on 3.10^4 Al radiator | * Beam conditions: 180nA e-beam on 3.10^4 Al radiator | ||
| Line 5: | Line 5: | ||
* take data at each HV settings for about 20 files | * take data at each HV settings for about 20 files | ||
* HV steps: +/- 25V: | * HV steps: +/- 25V: | ||
| − | ** HV = 1150, 1175, 1200, 1225, 1250, 1275, 1300 | + | ** HV = 1150, 1175, 1200, 1225, 1250, 1275, 1300 and new 1325, 1350 |
| − | ** HV = 1125, 1100, 1075 | + | ** HV = 1125, 1100, 1075, and new: 1050, 1025 |
| + | |||
| + | After the scan return to nominal running conditions as follows: | ||
| + | |||
| + | On the TOF HV screen click save/restore. This opens a small window. | ||
| + | Click restore HV parameter setpoints. This opens a larger window. | ||
| + | Check that the file at the top of the list is selected, this ends with 1_Dec_2019_ALL1150V.snap | ||
| + | Click Restore. | ||
| + | |||
| + | == HV SCAN OF TOF PMTS WINTER 2023 == | ||
| + | * Beam conditions: 150nA e-beam on 3.10^4 Al radiator: the rates in all PMts should be well below 1MHz. | ||
| + | * start with 1150V for all PMTs | ||
| + | ** HV = 1150, 1100, 1050, 1200, 1250, 1300, 1350, 1400 | ||
| + | * take data at each HV settings for about 30 minutes | ||
| + | * after scan restore HV settings to lates values of the database. | ||
Latest revision as of 09:51, 13 January 2023
HV SCAN OF TOF PMTS
- Beam conditions: 180nA e-beam on 3.10^4 Al radiator
- start with 1150V for all PMTs
- take data at each HV settings for about 20 files
- HV steps: +/- 25V:
- HV = 1150, 1175, 1200, 1225, 1250, 1275, 1300 and new 1325, 1350
- HV = 1125, 1100, 1075, and new: 1050, 1025
After the scan return to nominal running conditions as follows:
On the TOF HV screen click save/restore. This opens a small window. Click restore HV parameter setpoints. This opens a larger window. Check that the file at the top of the list is selected, this ends with 1_Dec_2019_ALL1150V.snap Click Restore.
HV SCAN OF TOF PMTS WINTER 2023
- Beam conditions: 150nA e-beam on 3.10^4 Al radiator: the rates in all PMts should be well below 1MHz.
- start with 1150V for all PMTs
- HV = 1150, 1100, 1050, 1200, 1250, 1300, 1350, 1400
- take data at each HV settings for about 30 minutes
- after scan restore HV settings to lates values of the database.
