Difference between revisions of "PMT & Divider"
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* [https://halldweb.jlab.org/DocDB/0049/004981/004/amp_lin.pdf Linearity test of the modified amplifier (gain 3)] | * [https://halldweb.jlab.org/DocDB/0049/004981/004/amp_lin.pdf Linearity test of the modified amplifier (gain 3)] | ||
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+ | * Latest design of the divider (April 2021, 900 uA at 1 kV) | ||
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'''Documents''' | '''Documents''' | ||
:: [https://halldweb.jlab.org/detectors/fcal2/pmt/Pub-97-092.pdf PMT lifetime studies at FNAL] | :: [https://halldweb.jlab.org/detectors/fcal2/pmt/Pub-97-092.pdf PMT lifetime studies at FNAL] |
Revision as of 15:24, 4 May 2021
PMTs
- Hamamatsu R4125 PMT:
- Magnetic shielding
- TOSCA calculation (by Sasha Glamazdin)
- presentation
- (ppt file location /u/group/halld/Subsystems/HFCal/talk/Hybrid_FCal_shield.pptx)
- Directory with TOSCA results /u/group/halld/Subsystems/HFCal/.
PMT Active Base
Modified Active Bases (2020)
- Three active bases were modified by V.Popov. They were installed and testes using the CCAL
- (including resistor values for different amplifier gains)
- New modifications: (1) modify resistors to limit divider current below 1 mA (2) Increase voltages on first dynodes
- - New bases installed in the Hall
- Divider current after installation [1]
- - New bases installed in the Hall
- Latest design of the divider (April 2021, 900 uA at 1 kV)
Documents