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installation_fp_sci [2015/05/04 12:55] pereira [Installation of FP scintillator] |
installation_fp_sci [2015/05/04 13:09] pereira [Closing focal-plane chamber] |
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- | ==== Installation of FP scintillator ==== | + | ==== Installing |
- 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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- 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 | ||
- | - | ||
- | he first step to do is unplugging the up and down bases of the phototubes | ||
- | In order to remove the " | ||
- | + | ==== Closing focal-plane chamber ==== | |
- | Click Vent status [start pumpdown] | + | - Turn the switch to move the chamber to position " |
+ | | ||
+ | - 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 | ||
+ | - Close the manual pump; open PanelMate **S800vac** and go to page 07. Select window **PUMPDOWN STATUS** and click on start pumpdown | ||
+ | - |