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This is the vacuum space of the superconducting magnet. When the system is running/operational, the IVC should be below 9 x 10E-6 Torr.
If this values value goes above 1 x 10E-5 Torr, then IMMEDIATELY contact the Target Expert to fix it.
Note: during magnet LHe fills, LN2 fills, and fridge fills this IVC can fluctuate but it should go back to below 9 x 10E-6 Torr soon.
These are the possibilities for increasing IVC
1) The backing pump is off or not running: you will need to access NM3 and get it started while monitoring IVC.
2) The turbo pump is off or not running: you will need to access NM4, and check the turbo status from its controller at the slow controls rack, clear any alarms/error messages, and start it.
The one on the left (TPG361) is the IVC readout device, and the one on the right (DCU 600) is the controller for the turbo pump. The nominal rotation frequency of DCU600 is 660 Hz (set value (upper), and actual value (lower) are displayed on that screen #309).
3) The IVC readout can have failures. You may need to restart it if needed. There is a switch on the back of that TPG361 readout device (see the left-hand side module of the above picture) to turn ON/OFF. Then you will need to LONG PRESS the UP arrow to get the reading on the display.
3) A leak in the piping: you will need to access the cave and check the piping, the check valve (red one on the magnet surface, north side)
4) The fridge pressure also maybe keep increasing. Check whether the roots pumps are running, if not start them.
5) A sudden power outage: IMMEDIATELY contact the Target Expert and have the backup power setup running and start the backing pump and turbo pump while monitoring the IVC pressure.
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