S800 Documentation

User Tools

Site Tools

Trace:
vacuum_control

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision 		Previous revision
Next revision Both sides next revision
vacuum_control [2014/11/17 10:16]
pereira [General Information] 		vacuum_control [2014/11/17 10:45]
pereira [Object Box]
Line 23: Line 23:
  
  
-{{:wiki:s800vac-p16.jpg?850|PanelMate. File s800vac.ui, page 16}}+{{:wiki:s800vac-p16.jpg?950|PanelMate. File s800vac.ui, page 13}}
  
  
Line 35: Line 35:
 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, 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 =====
  
 The venting and pumping of the target area vacuum chamber is taken care of by the experimenters. Since this chamber is always shifting between different configurations, the status of the system as displayed on the PanelMate control page may not be reliable at any given time. The readout from the ion gauge should be fed into the PanelMate for either configuration.  The state display and the ability to control the two beamline gatevalves, I246GV and I255GV, should also be functioning in PanelMate for either configuration, but the interlock status display and the interlock functionality to protect from opening either gatevalve at the wrong time may not be set up correctly. The venting and pumping of the target area vacuum chamber is taken care of by the experimenters. Since this chamber is always shifting between different configurations, the status of the system as displayed on the PanelMate control page may not be reliable at any given time. The readout from the ion gauge should be fed into the PanelMate for either configuration.  The state display and the ability to control the two beamline gatevalves, I246GV and I255GV, should also be functioning in PanelMate for either configuration, but the interlock status display and the interlock functionality to protect from opening either gatevalve at the wrong time may not be set up correctly.
  
-**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, producing critical damage in 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, producing critical damage in 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.
  
 ===== Focal Plane Box ===== ===== Focal Plane Box =====
vacuum_control.txt ยท Last modified: 2019/10/17 10:43 by pereira

Page Tools

Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 4.0 International
CC Attribution-Noncommercial-Share Alike 4.0 International Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki