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venting_pumping_intermediate_image_box [2017/06/12 12:36] pereira [Venting/pumping Intermediate Image box] |
venting_pumping_intermediate_image_box [2023/02/13 14:40] noji The title has been modified so it is similar to the FP GHS page. |
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- | ===== Venting/ | + | ====== Venting/ |
- | The procedures to vent/pump the S800 Intermediate | + | * [[#General information]] |
+ | * [[# | ||
+ | * [[#Pumping Intermediate-image chamber]] | ||
+ | * [[# | ||
- | {{: | + | ===== General information ===== |
- | ==== Vent focal-plane chamber | + | The procedures to vent/ |
- | * Open the [[hv_bias|HV Remote Control]] GUI and ensure that the focal-plane | + | |
- | * Open the [[gas_handling_system# | + | |
- | * Ensure | + | |
- | * Ensure that the FP ion gauge (I264IG) is off (see details [[vacuum_control|here]]) | + | |
- | * Open PanelMate and select **S800vac** file in directory \\exp\files\control\ncsdata\General\Qt\Templates. Go to page 07, click on the **VENT STATUS** window and begin the venting procedure. The **VENT VALVE I260VV** window will turn red and display " | + | |
- | * Gently open the manual venting valve until the pressure displayed | + | |
- | {{:wiki: | + | |
- | * Wait until the chamber is vented (few hours). The **I261PG** Pirani Gauge should read slightly above atmospheric pressure (due to the dry N2 flow pumped to the chamber). The window **VENT STATUS** in PanelMate should display "VENT VALVE OPEN". The window **PUMPDOWN STATUS** should display " | + | |
+ | {{: | ||
+ | |||
+ | 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. | ||
+ | |||
+ | {{: | ||
+ | |||
+ | The layout of the II-GHS is shown below. | ||
+ | |||
+ | {{: | ||
+ | |||
+ | The operational states of the II-GHS are shown in the diagram below. | ||
+ | |||
+ | {{: | ||
+ | |||
+ | ===== Emptying Detectors ===== | ||
+ | - Set “PPAC Setpoint” to 0 Torr. | ||
+ | - Click **EMPTY** on the “GHS_II-PPAC_Main” page to begin pumping out the gas quickly. | ||
+ | - When “PPAC Pressure” reads < 0.1 Torr, click **MAN** and then **AUTO**. This will release the remaining gas into the diagnostics box. | ||
+ | - Monitor D2340 pumping station and ensure the TMP stays on and TGV remains open. If not, contact the Vacuum Operation group. | ||
+ | - Valves #1-5 should be closed and valve #6 should remain open. From this state click PUMP to enter pump mode and leave the system in this state until it is ready to be filled. | ||
+ | * Jorge noted on 2/12/2023 that this step did not work; he reported that when he clicked **PUMP** nothing happened. Instead, he had to “manually” enter the PV name associated with this command and changed from 0 to 1. He speculated that this was most likely due to a CS Studio problem. | ||
+ | |||
+ | ===== 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: | ||
+ | - Step up “PPAC Setpoint” by 1 Torr from 0 to 6 Torr. Allow the “PPAC Pressure” to stabilize for 15 seconds at each step. This should be a quick process but **DO NOT** simply set the “PPAC Setpoint” to 6 Torr as the gas flow could overwhelm the system. | ||
+ | - PPAC pressure should stabilize after ~1 min. HV may now be turned on to operate the PPACs. | ||
+ | |||
+ | ===== Troubleshooting ===== | ||
+ | - If any issues are encountered during filling, running, or emptying, contact the Vacuum Operation group for assistance. |