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venting_pumping_intermediate_image_box [2017/06/12 14:25] pereira [Venting/pumping Intermediate Image box and filling PPACs with gas] |
venting_pumping_intermediate_image_box [2024/01/11 09:51] noji [Venting Chamber] |
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- | ===== Venting/ | + | ====== Venting/ |
- | The procedures to vent/pump the S800 Intermediate Image box, and/or filling the PPAC detectors with gas must be done carefully to ensure that the PPACs are not damaged. For instance, before venting the chamber, we have to make sure that the PPACs are empty and equalized with respect to the vacuum in the chamber. In order to avoid errors, an automated gas handling system (II-GHS) was designed to perform these tasks safety. The system is schematically illustrated in the figure below. It shows the status | + | * [[#General information]] |
+ | * [[#Emptying Detectors]] | ||
+ | * [[#Filling and Running Detectors]] | ||
+ | * [[# | ||
+ | ===== General information | ||
+ | The procedures to vent/pump the S800 Intermediate Image box, and/or filling the PPAC detectors with gas must be done carefully to ensure that the PPACs are not damaged. For instance, before venting the chamber, we have to make sure that the PPACs are empty and equalized with respect to the vacuum in the chamber. In order to avoid errors, an automated gas handling system (II-GHS) was designed to perform these tasks safely. The II-GHS equipment (valves, flow-meter, pipes, isobutane gas bottle. etc.) are located on the west balcony | ||
- | {{:wiki:ghsiippacs.png?1000|Gas Handling System of S800 Intermediate Image}} | + | {{:wiki:IIGHShardware.jpg?600|Gas Handling System of S800 Intermediate Image}} |
- | The II-GHS equipment (valves, flow-meter, pipes, etc.) are located | + | The GHS is operated remotely through CS studio. Its page can be found on the EXP network through FRIB EXP Main → S800 → GHS Pages (Secondary Pages) → Intermediate Image PPAC and is shown below. |
- | {{:wiki:IIGHShardware.jpg?600|Gas Handling System | + | {{:wiki:ii-ppac-ghs-css.png|}} |
- | ==== Vent focal-plane chamber | + | |
- | | + | The layout |
- | * Open the [[gas_handling_system# | + | |
- | | + | {{: |
- | * Ensure | + | |
- | | + | The operational states of the II-GHS are shown in the diagram below. |
- | | + | |
- | {{: | + | {{: |
- | | + | |
+ | ===== Emptying Detectors ===== | ||
+ | - Set “PPAC Setpoint” to 0 Torr. | ||
+ | | ||
+ | - When “PPAC Pressure” reads < 0.1 Torr, click **MAN** and then **AUTO**. This will release | ||
+ | | ||
+ | | ||
+ | * Jorge noted on 2/ | ||
+ | |||
+ | ===== Venting the Chamber ===== | ||
+ | |||
+ | ===== Evacuating the Chamber ===== | ||
+ | ===== Filling and Running Detectors ===== | ||
+ | - If in Vent Mode, click **PUMP** then click **RUN** to enter Run Mode. | ||
+ | - If in Pump Mode, click **RUN** to enter Run Mode. | ||
+ | - Plot and monitor IG_D2430: | ||
+ | | ||
+ | - PPAC pressure | ||
+ | ===== Troubleshooting ===== | ||
+ | - If any issues are encountered during filling, running, or emptying, contact the Vacuum Operation group for assistance. |