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vacuum_control [2014/12/02 10:51]
pereira [Object Box] 		vacuum_control [2019/10/17 10:43] (current)
pereira [Object Box]
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 The ion gauge for the [[Stations|Object station chamber]] vacuum system makes too much light for the object scintillator.  This ion gauge **I188IG** should be left off except when actually monitoring the vacuum level. The ion gauge for the [[Stations|Object station chamber]] vacuum system makes too much light for the object scintillator.  This ion gauge **I188IG** should be left off except when actually monitoring the vacuum level.
  
-As stated above (see figure above), this ion-gauge can only be turned off "locally" by pressing the **EMIS** button on its controllers, which are located in the S3 vault on the middle level in the electronics racks under the stairs to the top level. +As stated above (see figure above), this ion-gauge can only be turned off "locally" by pressing the **EMIS** button on its controllers, which are located in the S3 vault on the middle level in the electronics racks under the stairs to the top level. 
 + 
 ===== Target Chamber ===== ===== Target Chamber =====
  
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 **Important note**: Ensure that the experimenters never pump the chamber down if the spectrograph vacuum section is vented. The pressure gradient between both sections would "push" the structure of the spectrograph beam line towards the target chamber, potentially damaging the bellows of the line. **Important note**: Ensure that the experimenters never pump the chamber down if the spectrograph vacuum section is vented. The pressure gradient between both sections would "push" the structure of the spectrograph beam line towards the target chamber, potentially damaging the bellows of the line.
 +
 +
 ===== Spectrograph ===== ===== Spectrograph =====
 This system is pumped with cryopumps. Please do not vent this section if the target chamber is under vacuum pressure. The pressure gradient between both sections would "push" the structure of the spectrograph beam line towards the target chamber, potentially damaging the bellows of the line. This system is pumped with cryopumps. Please do not vent this section if the target chamber is under vacuum pressure. The pressure gradient between both sections would "push" the structure of the spectrograph beam line towards the target chamber, potentially damaging the bellows of the line.
vacuum_control.1417535466.txt.gz · Last modified: 2014/12/02 10:51 by pereira

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