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venting_pumping_object_box

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venting_pumping_object_box [2020/04/01 21:32]
pereira [Vent Object chamber] 		venting_pumping_object_box [2023/05/25 15:20]
swartzj
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   * Open **S800Vac** and go to page 01 ("Production Target Box Vacuum System sec 13")   * Open **S800Vac** and go to page 01 ("Production Target Box Vacuum System sec 13")
   * Verify that OBJ SCI is not biased:   * Verify that OBJ SCI is not biased:
-        * Check that the detectors is unbiased in the HV module sitting in dU6+        * Check that the detectors are unbiased in the HV module sitting in dU6
         * Notify the system of the bias-off state by selecting the "OBJ_SCI_HV CONFIRM" box and clicking "HV CONFIRM OFF"         * Notify the system of the bias-off state by selecting the "OBJ_SCI_HV CONFIRM" box and clicking "HV CONFIRM OFF"
   * Isolate chamber by closing gate valves **I177GV** and **I190GV**   * Isolate chamber by closing gate valves **I177GV** and **I190GV**
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         * Box "VENT STATUS" should change from "VENT PROCEDURE STOPPED" to "WAITING FOR VENT TIMER", and then to "VENT VALVE OPEN"         * Box "VENT STATUS" should change from "VENT PROCEDURE STOPPED" to "WAITING FOR VENT TIMER", and then to "VENT VALVE OPEN"
         * Turbo gate valve **I188GV** will be automatically closed         * Turbo gate valve **I188GV** will be automatically closed
-        * Vent valve **I190VV** will be automatically opened. However, the pressure in the chamber (ass seen in **I191PG** will not change because we need to open the manual venting valve+        * Vent valve **I190VV** will be automatically opened. However, the pressure in the chamber (as seen in **I191PG** will not change because we need to open the manual venting valve)
         * Go to the S800 OBJ station and slowly open the manual valve (see figure below). You can see the pressure rising in the Granville-Phillips 275 Mini-Convectron display located on top of the OBJ box.         * Go to the S800 OBJ station and slowly open the manual valve (see figure below). You can see the pressure rising in the Granville-Phillips 275 Mini-Convectron display located on top of the OBJ box.
         * When **I191PG** reads atmospheric pressure select the box "VENT STATUS" and click "STOP VENTING PROCESS"         * When **I191PG** reads atmospheric pressure select the box "VENT STATUS" and click "STOP VENTING PROCESS"
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 ===== Pumping Object chamber ===== ===== Pumping Object chamber =====
-Requirements: PanelMate file **S800Vac** + 
-  * Verify that Chamber is closed and that manual roughing pump valve located near the intermediate-image chamber is closed (see picture above) +From S800 Vacuum Main Page, go to Object chamber page. This will open the page in the figure below.  
-  * Verify that OBJ SCI is not biased by checking the HV module in dU6   +  * Make sure that the IG is off.  
-  * Open **S800Vac** and go to page 01 ("Production Target Box Vacuum System sec 13") +  * When you start, you should have RV closed, FV open and the TGV valve, Vent valve, as well as the gate valves named D2341 BGV and D2303 BGV all closed.  
-  * Check "PUMPDOWN STATUS INTERMEDIATE BEAMLINE OBJECT BOX"; it should read "PUMPDOWN STOPPED". Select that box and click on "START PUMPDOWN".  +  * Close FV and open RV to start pumping down the object chamber with the roughing pump. You can make a plot of the pressure at BPG at this point.  
-  * When the pressure in **I191PG** is below 100 mTorr, the Turbo Pump will start automatically through the following sequence: +  * Wait for the vacuum reading at BPG to drop to below 100 mTorr before you close RV and open FV.  
-        * **I190RV** will be closed +  * The vacuum reading at FPG needs to drop to below 150 mTorr before you can safely turn on the turbo pump.  
-        * **I190FV** will be opened +  * After turning on the turbo pump, wait for the inner circle of the pump symbol to turn green and the pump to reach 40 000 rpm before you open the valve at TGV.  
-        * **I188GV** will be opened +  * When the pressure decreases to below 10-3 Torr, you should see the pressure bottom out on your BPG plot, you can turn on the IG and also plot its pressure over time.  
-  * When the pressure ready by **I191PG** is few mTorr, you can turn on the ion gauge **I188IG**. Good vacuum will take ~30 minutes.+
    
  
venting_pumping_object_box.txt · Last modified: 2024/02/06 10:40 by noji

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