venting_pumping_intermediate_image_box
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venting_pumping_intermediate_image_box [2018/12/19 11:07] pereira [Venting/pumping Intermediate Image box and filling PPACs with gas] |
venting_pumping_intermediate_image_box [2018/12/20 15:16] pereira [Removing gas from Intermediate-image delay PPAC] |
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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 ===== | ||
| Line 69: | Line 69: | ||
| * (Note: sometimes it is necessary to repeat this operation a couple of times). | * (Note: sometimes it is necessary to repeat this operation a couple of times). | ||
| * At the end of the procedure, close the manual roughing pump valve | * At the end of the procedure, close the manual roughing pump valve | ||
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| + | ===== Filling/ | ||
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| + | {{: | ||
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| + | Requirements: | ||
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| + | ==== Filling Intermediate-image delay PPAC with gas ==== | ||
| + | * Verify that PPACs are not biased: | ||
| + | * Check that the detectors are unbiased by opening the [[HV bias|HV GUI]] | ||
| + | * 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**) | ||
| + | * 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 " | ||
| + | * Confirm that PanelMate box " | ||
| + | * Open the gas bottle valve (sitting near the gas handling system) | ||
| + | * 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 | ||
| + | * Valve V1 (Gas supply) will open, and V2, V3, and V6 (Chamber Bypass) will close | ||
| + | * GH System status should indicate "Gas Flowing" | ||
| + | * I214CM Press Rdg will gradually increase to the set value | ||
| + | * When the detector is filled, valve V5 (Det Bypass) will close | ||
| + | * GH System status will indicate "Flow Estab." | ||
| + | * I214BON_CONFIM will change to "PPAC BIAS ASSUMED ON" | ||
| + | * 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 by opening the [[HV bias|HV GUI]] | ||
| + | * Notify the system of the bias-off state by selecting the " | ||
| + | * Verify that PPACs are in automatic mode with gas flowing (**S3_Gas_Handling**) | ||
| + | * The "GH System Status box should read "Auto Gas Flow Estab" | ||
| + | * If gas is flowing 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 " | ||
| + | * I214 Gas Sup V1 (open) | ||
| + | * Gas Lin Pmp out V2 (closed) | ||
| + | * Flow Bypass V3 (closed) | ||
| + | * Det Return V4 (open) | ||
| + | * Det Bypass V5 (closed) | ||
| + | * Chmbr Bypass (closed) | ||
| + | * I214V_NCL (enabled) | ||
| + | * PanelMate box "Gas Removal Control" | ||
| + | * 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 should indicate "Gas Removal" | ||
| + | * 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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venting_pumping_intermediate_image_box.txt ยท Last modified: 2024/01/12 09:37 by noji
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