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--- venting_pumping_intermediate_image_box [2018/12/19 11:07]
pereira [Pumping Intermediate-image chamber]
+++ venting_pumping_intermediate_image_box [2018/12/19 11:22]
pereira [Filling Intermediate-image delay PPAC]
@@ Line 74: / Line 74: @@
 ===== Filling Intermediate-image delay PPAC =====
+Requirements: PanelMate files **S3_Gas_Handling** and **S800Vac**
+  * 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 "I214BON_CONFIRM" box in **S3_Gas_Handling** and clicking "PP BIAS OFF CONFIRMED"
+  * 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 "I214BON_CONFIRM" box should indicate "PP BIAS OFF CONFIRMED", and the only that should be open in **S3_Gas_Handling** are the "Det Bypass" (V5) and "Chmbr Bypass" (V6)
+  * Confirm that PanelMate box "I214P_AUTO/MAN Pre Set" reads 5 Torr (the set gas pressure in the detector)
+  * PanelMate box "Gas Flow Control" should indicate "OK to Start Gas Flow". Select that box and click on "Start Gas Flow"
+        *
+  *
+  * Open **S800Vac** and go to page 03 ("Intermediate image box vacuum system sec 15")
+  * Isolate chamber by closing gate valves **I212GV** and **I215GV**
+  * [[Vacuum control|Turn off]] ion gauge **I213IG**
+  * Check box "PUMPDOWN STATUS INTERMEDIATE IMAGE BOX". It should read "Good vacuum"

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