This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
venting_pumping_object_box [2018/04/25 17:42] pereira [Vent Object chamber] |
venting_pumping_object_box [2023/05/16 12:23] swartzj |
||
---|---|---|---|
Line 6: | Line 6: | ||
* Open **S800Vac** and go to page 01 (" | * Open **S800Vac** and go to page 01 (" | ||
* Verify that OBJ SCI is not biased: | * Verify that OBJ SCI is not biased: | ||
- | * Check that the detectors | + | * Check that the detectors |
* Notify the system of the bias-off state by selecting the " | * Notify the system of the bias-off state by selecting the " | ||
* Isolate chamber by closing gate valves **I177GV** and **I190GV** | * Isolate chamber by closing gate valves **I177GV** and **I190GV** | ||
* [[Vacuum control|Turn off]] ion gauge **I188IG** | * [[Vacuum control|Turn off]] ion gauge **I188IG** | ||
* Check box " | * Check box " | ||
+ | * Go to the S800 OBJ station and make sure that the manual valve (see figure below) is closed. | ||
+ | |||
{{: | {{: | ||
* In order to begin venting process, select box "VENT STATUS" | * In order to begin venting process, select box "VENT STATUS" | ||
* Box "VENT STATUS" | * Box "VENT STATUS" | ||
* 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 {{: | + | * 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 |
* When **I191PG** reads atmospheric pressure select the box "VENT STATUS" | * When **I191PG** reads atmospheric pressure select the box "VENT STATUS" | ||
* The status in the box "VENT STATUS" | * The status in the box "VENT STATUS" | ||
Line 22: | Line 24: | ||
* You can now open the chamber | * You can now open the chamber | ||
+ | {{: | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | ===== Pumping Object chamber ===== | ||
+ | Requirements: | ||
+ | * Verify that Chamber is closed and that manual roughing pump valve located near the intermediate-image chamber is closed (see picture above) | ||
+ | * Verify that OBJ SCI is not biased by checking the HV module in dU6 | ||
+ | * Open **S800Vac** and go to page 01 (" | ||
+ | * Check " | ||
+ | * When the pressure in **I191PG** is below 100 mTorr, the Turbo Pump will start automatically through the following sequence: | ||
+ | * **I190RV** will be closed | ||
+ | * **I190FV** will be opened | ||
+ | * **I188GV** will be opened | ||
+ | * When the pressure ready by **I191PG** is few mTorr, you can turn on the ion gauge **I188IG**. Good vacuum will take ~30 minutes. | ||
+ | |||