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vacuum_control [2013/12/26 14:49] pereira [Vacuum controller] |
vacuum_control [2014/12/02 10:51] pereira [Object Box] |
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===== General Information ===== | ===== General Information ===== | ||
- | Vacuum control and monitoring of the S800 is provided through the **S800vac** | + | Vacuum control and monitoring of the S800 is provided |
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+ | * Page 1: **Vacuum section 13** corresponds to the segment of the beam line that includes the **object-box** between ion gauges I177GV and I190GV. The ion-gauge monitoring the vacuum pressure in the object box is **I188IG** | ||
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+ | * Page 2: **Vacuum section 14** corresponds to the segment of the beam line that includes the **upper-dipoles** in the analysis line. It is defined between ion gauges I190GV and I212GV. The ion-gauge monitoring the vacuum pressure in this section is **I203IG** | ||
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+ | * Page 3: **Vacuum section 15** corresponds to the segment of the beam line that includes the **intermediate-image chamber** between ion gauges I212GV and I215GV. The ion-gauge monitoring the vacuum pressure in chamber is **I213IG** | ||
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+ | * Page 4: **Vacuum section 16** corresponds to the segment of the beam line that includes the **lower-dipoles** in the analysis line. It is defined between ion gauges I215GV and I246GV. The ion-gauge monitoring the vacuum pressure in this section is **I225IG** | ||
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+ | * Page 5: **Vacuum section 17** corresponds to the segment of the beam line that includes the **target chamber**. It is defined between ion gauges I246GV and I255GV. The ion-gauge monitoring the vacuum pressure in this section is **I252IG** | ||
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+ | * Page 6: **Vacuum section 18** corresponds to the segment of the beam line that includes the **spectrograph magnets**. It is defined between ion gauges I255GV and I265GV. The ion-gauge monitoring the vacuum pressure in this section is **I267IG** | ||
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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** | ||
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+ | * Page 13: This page displays the pressures read by ALL the ion gauges of the analysis line and spectrograph (see figure below) | ||
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+ | 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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+ | {{: | ||
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- | 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, | ||
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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===== Object Box ===== | ===== Object Box ===== | ||
- | 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 (see figure 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 " | ||
===== Spectrograph ===== | ===== Spectrograph ===== | ||
- | This system is pumped with cyropumps (NEEDS MORE INFO) | + | 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 ===== |