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vacuum_control [2014/11/17 10:14] pereira [General Information] |
vacuum_control [2014/11/19 10:47] pereira [General Information] |
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* Page 7: **Vacuum section 19** corresponds to the **focal-plane chamber**. It is isolated from the rest of the beam line by gate valve I265GV. The ion-gauge monitoring the vacuum pressure in this section is **I264IG** | * Page 7: **Vacuum section 19** corresponds to the **focal-plane chamber**. It is isolated from the rest of the beam line by gate valve I265GV. The ion-gauge monitoring the vacuum pressure in this section is **I264IG** | ||
- | * Page 13: This page displays the pressures read by ALL the ion gauges of the analysis line and spectrograph | + | * Page 13: This page displays the pressures read by ALL the ion gauges of the analysis line and spectrograph |
- | {{: | + | {{: |
- | The readout from the ion gauges in the S3 vault is available through the control system, but these gauges cannot be turned on and off remotely. They are switched on and off locally by pressing the **EMIS** button on their controllers, | + | The readout from the ion gauges in the S3 vault is available through the control system, but these gauges cannot be turned on and off remotely. They are switched on and off locally by pressing the **EMIS** button on their controllers, |
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All vacuum sections in the in the S800 have automated control of venting and pumpdown that operates valves and pumps (but not ion gauges) in the right sequence with the appropriate delays. In beamline section containing detectors, this automated control must be coordinated appropriately with steps to protect detectors. | All vacuum sections in the in the S800 have automated control of venting and pumpdown that operates valves and pumps (but not ion gauges) in the right sequence with the appropriate delays. In beamline section containing detectors, this automated control must be coordinated appropriately with steps to protect detectors. | ||
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The ion gauge for the [[Stations|Object station chamber]] vacuum system makes too much light for the object scintillator. | The ion gauge for the [[Stations|Object station chamber]] vacuum system makes too much light for the object scintillator. | ||
+ | As stated above, this ion-gauge can only be turned off " | ||
===== 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 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, | ||
- | **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 " | + | **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 " |
===== 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 " | + | 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 " |
===== Focal Plane Box ===== | ===== Focal Plane Box ===== |