installation_fp_sci
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installation_fp_sci [2015/05/04 12:55] pereira [Installation of FP scintillator] |
installation_fp_sci [2015/05/04 13:03] pereira [Closing focal-plane chamber] |
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| - | ==== Installation of FP scintillator | + | ==== Closing focal-plane chamber |
| - The figure below shows the FP chamber open, with the " | - The figure below shows the FP chamber open, with the " | ||
| - Unplug the bases of the up and down phototubes. The platic tie holding the cable of the up phototube to the chamber needs to be cut {{: | - Unplug the bases of the up and down phototubes. The platic tie holding the cable of the up phototube to the chamber needs to be cut {{: | ||
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| Click Vent status [start pumpdown] --> vent status= pumpdown in progress (blue) | Click Vent status [start pumpdown] --> vent status= pumpdown in progress (blue) | ||
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| + | - Turn the switch to move the chamber to position " | ||
| + | - 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 | ||
| + | - 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 {{: | ||
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installation_fp_sci.txt · Last modified: 2023/08/18 10:19 by noji
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