Difference between revisions of "PMT & Divider"
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:::: [https://halldweb.jlab.org/wiki-private/index.php/FCAL_insert_counter_prototype Prototype of the PMT housing (magnetic field shielding)] | :::: [https://halldweb.jlab.org/wiki-private/index.php/FCAL_insert_counter_prototype Prototype of the PMT housing (magnetic field shielding)] | ||
| + | *[https://halldweb.jlab.org/wiki-private/index.php/PMT_testing '''PMT testing for Compton Calorimeter (2018)'''] | ||
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| + | *[https://halldweb.jlab.org/wiki-private/index.php/PMT_for_FCAL_insert '''Procurement of PMTs '''] | ||
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* New modifications: (1) modify resistors to limit divider current below 1 mA (2) Increase voltages on first dynodes | * New modifications: (1) modify resistors to limit divider current below 1 mA (2) Increase voltages on first dynodes | ||
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| − | :: - [https://logbooks.jlab.org/entry/3844449 New bases installed in the Hall] Divider current after installation [https://logbooks.jlab.org/entry/3844569] | + | :: - [https://logbooks.jlab.org/entry/3844449 New bases installed in the Hall] |
| − | + | ::: Divider current after installation [https://logbooks.jlab.org/entry/3844569] | |
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:: - [https://halldweb.jlab.org/detectors/fcal2/dividers/vlad_modify/Test_Vlads_new_resistor_values.pdf Corresponding voltages] | :: - [https://halldweb.jlab.org/detectors/fcal2/dividers/vlad_modify/Test_Vlads_new_resistor_values.pdf Corresponding voltages] | ||
| + | :: - [https://halldweb.jlab.org/detectors/fcal2/dividers/vlad_modify/New_DIV.pdf Resistor values][https://halldweb.jlab.org/detectors/fcal2/dividers/vlad_modify/divider_resistors.xlsx ] | ||
* [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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| + | * [https://halldweb.jlab.org/detectors/fcal2/dividers/vlad_modify/HV1000V_900uA.docx Latest design of the divider (April 2021, 900 uA at 1 kV)] | ||
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| + | * [https://halldweb.jlab.org/detectors/fcal2/dividers/vlad_modify/FCAL2_AMP.JPG Schematic view of the amplifier (2022) ][https://halldweb.jlab.org/detectors/fcal2/dividers/vlad_modify/FCAL2_Divider_2022.pdf] (intermediate versions) | ||
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| + | * [https://halldweb.jlab.org/detectors/fcal2/dividers/fcal2_divider_final/FCAL2_Rev2_schematic.pdf Final version (2023)] | ||
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| + | '''[[Active Base Radiation Tests]]''' | ||
'''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] | ||
Latest revision as of 11:38, 28 November 2023
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
- Schematic view of the amplifier (2022) [3] (intermediate versions)
Documents
