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venting_pumping_intermediate_image_box [2018/12/19 11:22] pereira [Filling Intermediate-image delay PPAC] |
venting_pumping_intermediate_image_box [2018/12/20 15:15] pereira [Filling Intermediate-image delay PPAC with gas] |
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* [[#Vent Intermediate-image chamber|Venting Intermediate-image chamber]] | * [[#Vent Intermediate-image chamber|Venting Intermediate-image chamber]] | ||
* [[#Pumping Intermediate-image chamber]] | * [[#Pumping Intermediate-image chamber]] | ||
- | * [[#Filling Intermediate-image delay PPAC]] | + | * [[#Filling/Removing gas in Intermediate-image delay PPAC]] |
===== General information ===== | ===== General information ===== | ||
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- | ===== Filling Intermediate-image delay PPAC ===== | + | ===== Filling/Removing gas in Intermediate-image delay PPAC ===== |
+ | |||
+ | {{: | ||
Requirements: | Requirements: | ||
+ | ==== Filling Intermediate-image delay PPAC with gas ==== | ||
* Verify that PPACs are not biased: | * Verify that PPACs are not biased: | ||
* Check that the detectors are unbiased by opening the [[HV bias|HV GUI]] | * Check that the detectors are unbiased by opening the [[HV bias|HV GUI]] | ||
* Notify the system of the bias-off state by selecting the " | * Notify the system of the bias-off state by selecting the " | ||
+ | * Verify that ion gauge I213IG is off | ||
* Verify that PPACs are in automatic mode with gas removed (**S3_Gas_Handling**) | * Verify that PPACs are in automatic mode with gas removed (**S3_Gas_Handling**) | ||
* The "GH System Status box should read "Auto Mode Gas Removed" | * The "GH System Status box should read "Auto Mode Gas Removed" | ||
- | * If gas is removed but the system is not in the automatic mode, consult the Beam Physicists or Device Physicist. This typically requires to verify that the system is in a controlled status. In particular, the " | + | * If gas is removed but the system is not in the automatic mode, consult the Beam Physicists or Device Physicist. This typically requires to verify that the system is in a controlled status. In particular, the " |
* Confirm that PanelMate box " | * Confirm that PanelMate box " | ||
+ | * Open the gas bottle valve (sitting near the gas handling system) | ||
* PanelMate box "Gas Flow Control" | * PanelMate box "Gas Flow Control" | ||
- | * | + | * Valve V2 (Gas lin pmp out) will be opened and I214V_NCL will change from closed to " |
- | * | + | * Valves V3 (Flow Bypass) and V4 (Det Return) will open |
- | * Open **S800Vac** and go to page 03 ("Intermediate image box vacuum system sec 15") | + | * Valve V1 (Gas supply) will open, and V2, V3, and V6 (Chamber Bypass) will close |
- | * Isolate chamber | + | |
- | * [[Vacuum control|Turn off]] ion gauge **I213IG** | + | |
- | * Check box "PUMPDOWN STATUS INTERMEDIATE IMAGE BOX" | + | |
+ | | ||
+ | * I214BON_CONFIM will change | ||
+ | * The valves status will be: V1 (open), V2 (closed), V3 (closed), V4 (open), V5 (closed), V6 (closed), I214V_NCL (enabled) | ||
+ | * You can now turn on the detectors | ||
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+ | ==== Removing gas from Intermediate-image delay PPAC ==== | ||
+ | * Verify that PPACs are not biased: | ||
+ | * Check that the detectors are unbiased | ||
+ | * Notify the system of the bias-off state by selecting the " | ||
+ | | ||
+ | * The "GH System Status box should read "Auto Gas Flow Estab" | ||
+ | | ||
+ | | ||
+ | | ||
+ | | ||
+ | * Det Return V4 (open) | ||
+ | * Det Bypass V5 (closed) | ||
+ | * Chmbr Bypass (closed) | ||
+ | * I1214V_NCL (enabled) | ||
+ | * PanelMate | ||
+ | * Valves V1 (I214 Gas Sup) and I214V_NCL will close | ||
+ | * Valves V3 (Flow Bypass) and Det Bypass (V5) will open | ||
+ | * I214CM Press Rdg will gradually decrease to zero | ||
+ | * GH System status | ||
+ | * When the gas is removed from the detector | ||
+ | * Valve V3 (Flow Bypass) and 4 (Det return) will close | ||
+ | * Valve V6 (Chamber Bypass) will open | ||
+ | * GH System status will indicate "Gas Removed" | ||
+ | * I214BON_CONFIM will change to "PPAC BIAS ASSUMED ON" | ||
+ | * The valves status will be: V1 (closed), V2 (closed), V3 (closed), V4 (closed), V5 (open), V6 (open), I214V_NCL (closed) | ||
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