Readiness checklist

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•  If ending operation with the x-ray beamline, make sure that the pulse picker is closed, stopper S6 is inserted, hutch search is broken and glass window inserted.
• Hutch must be open
•  Stand next to the target chamber during the procedure to (be ready to react once the chamber is vented and venting is completed to avoid over-pressurization.)

Venting procedure

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•  Press INSERT GL in the BERYLLIUM WINDOW SYSTEM section (glass window triangle logo must be red)
•  Check TC1-VGC-01, TC1-VGC-02, TC1-VGC-03, TC1-VGC-04

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• , VGC-09 (gate valves leading to the target chamber)
•  Press CLS on all open gate valves leading to the chamber (their triangle logos must all be red)
•  Remove the 4 locks on one of the target chamber doors
•  Press OPN on TC1:VGC:11

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• (the following window will open)
  Image Modified

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•  Press Yes and close the window immediately

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• (pay attention to the sound)
•  Wait until you can hear the compressed dry air intake loudly

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•  Press CLS on TC1:VGC:11

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• immediately
•  Open 1 or 2 target chamber doors, hook them open with the rubber string
•  Allow some time to ventilate the chamber before

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• doing anything inside the target chamber
•  If you are not going to pump down again right away, please follow the Turbo pump shutdown procedure below

Turbo pump shutdown

It is not mandatory to shutdown the turbo pump during each venting cycle. We usually let it run when venting for a short time during a shift. If venting for a longer time between two shifts, we usually turn off the turbo pump but not its rouging. The following steps describe a full shutdown of the turbo line after venting.

•  Turn the gas ballast control knob of the scroll pump to level I
•  If you are going to pump down within the next hour, stop here, otherwise continue the procedure
•  Press STP next to the turbo pump logo

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•  Allow at least 15-20 minutes for the turbo pump to spin down (the off-status logo

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• does not mean the blades have stopped spinning)

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•  Press CLS on SEW-VGC-15

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•  If you are going to pump down within the next 12 hours, stop here, otherwise continue the procedure
•  Turn the gas ballast control knob of the scroll pump to level 0
•  Open mechome, go to the tab "User Devices"

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• , open the panel "User Sentry PDU"

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•  Turn

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• On "Roughing pump PTM 02 (turbo 2)"

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