installation_fp_sci
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installation_fp_sci [2015/05/04 13:03] pereira [Closing focal-plane chamber] |
installation_fp_sci [2015/05/04 13:05] pereira [Closing focal-plane chamber] |
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| - | ==== Closing focal-plane chamber | + | ==== Installing FP scintillator |
| - The figure below shows the FP chamber open, with the " | - The figure below shows the FP chamber open, with the " | ||
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| - Connect the bases of the up and down phototubes. The later is quite difficult because one cannot see the pins | - Connect the bases of the up and down phototubes. The later is quite difficult because one cannot see the pins | ||
| - Using a plastic tie, attach the cable of the up phototube to the scintillator frame | - Using a plastic tie, attach the cable of the up phototube to the scintillator frame | ||
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| - | he first step to do is unplugging the up and down bases of the phototubes | ||
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| - | In order to remove the " | ||
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| - | Click Vent status [start pumpdown] --> vent status= pumpdown in progress (blue) | ||
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| + | ==== Closing focal-plane chamber ==== | ||
| - Turn the switch to move the chamber to position " | - Turn the switch to move the chamber to position " | ||
| - When the chamber is almost close, turn the know to close the clamps | - When the chamber is almost close, turn the know to close the clamps | ||
| - Before pumping the chamber down, make sure that the scintillator is properly connected. This can be done by biasing the detector and checking the signals, either from the scalers or with a scope. One should clearly see cosmic rays; if that is not the case, the phototubes are likely miss connected | - Before pumping the chamber down, make sure that the scintillator is properly connected. This can be done by biasing the detector and checking the signals, either from the scalers or with a scope. One should clearly see cosmic rays; if that is not the case, the phototubes are likely miss connected | ||
| - | - In order to pumpdown the chamber, make sure that the manual vent valve is closed | + | - In order to pumpdown the chamber, make sure that the manual vent valve is closed. Start the manual pump to get a pressure below 50 mtorr {{: |
| - | - Start the manual pump to get a pressure below 50 mtorr {{: | + | |
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installation_fp_sci.txt · Last modified: 2023/08/18 10:19 by noji
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