S800 Documentation

User Tools

Site Tools

Trace:
venting_pumping_intermediate_image_box

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision 		Previous revision
venting_pumping_intermediate_image_box [2024/01/11 12:39]
noji [Evacuating the Chamber] 		venting_pumping_intermediate_image_box [2024/09/26 08:50] (current)
pereira [Evacuating the Chamber]
Line 2: Line 2:
   * [[#General information]]   * [[#General information]]
   * [[#Emptying Detectors]]   * [[#Emptying Detectors]]
 +  * [[#Venting the Chamber]]
 +  * [[#Evacuating the Chamber]]
   * [[#Filling and Running Detectors]]   * [[#Filling and Running Detectors]]
   * [[#Troubleshooting]]   * [[#Troubleshooting]]
Line 22: Line 24:
  
 ===== Emptying Detectors ===== ===== Emptying Detectors =====
 +  - Double check that the detectors have been unbiased.
   - Set “PPAC Setpoint” to 0 Torr.   - Set “PPAC Setpoint” to 0 Torr.
   - Click **EMPTY** on the “GHS_II-PPAC_Main” page to open valves #3 and #4 which will allow for pumping out the gas quickly.   - Click **EMPTY** on the “GHS_II-PPAC_Main” page to open valves #3 and #4 which will allow for pumping out the gas quickly.
Line 37: Line 40:
  
 To vent the chamber: To vent the chamber:
-  - Put the GHS in vent mode by clicking **VENT** (valves #5 and #6 are open),+  - Let the Control Room and the Vacuum Operation Group be aware as EXP alarms may occur, 
 +  - put the GHS in vent mode by clicking **VENT** (valves #5 and #6 are open),
   - monitor **RBT_BTS32:BPG_D2430:VP_RD** and **S800_GHS:PI_D2431:V_RD_AB** in a data browser,   - monitor **RBT_BTS32:BPG_D2430:VP_RD** and **S800_GHS:PI_D2431:V_RD_AB** in a data browser,
-  - close **RV**, the valve to the roughing pump, and+  - ensure that **RV**, the valve to the roughing pump, is closed, and
   - open **Vent** valve to start venting.   - open **Vent** valve to start venting.
  
 The PPAC pressure S800_GHS:PI_D2431:V_RD_AB should closely follow the chamber pressure   The PPAC pressure S800_GHS:PI_D2431:V_RD_AB should closely follow the chamber pressure  
 RBT_BTS32:BPG_D2430:VP_RD up to about 10 Torr, which is the upper limit of the range of the gauge for S800_GHS:PI_D2431:V_RD_AB. RBT_BTS32:BPG_D2430:VP_RD up to about 10 Torr, which is the upper limit of the range of the gauge for S800_GHS:PI_D2431:V_RD_AB.
-===== Evacuating the Chamber =====+===== Pumping down the Chamber =====
  
 Ensure Ensure
Line 65: Line 69:
   - Be sure to go back to S3 and close the manual valve.   - Be sure to go back to S3 and close the manual valve.
 ===== Filling and Running Detectors ===== ===== Filling and Running Detectors =====
-  - If in Vent Mode, click **PUMP** then click **RUN** to enter Run Mode.+  - If in Vent Mode, click **PUMP** then click **RUN** to enter Run Mode. The valves #1 opens and #3 remains open (#5 and #6 will be closed, and the GHS lines will be isolated from the chamber).
   - If in Pump Mode, click **RUN** to enter Run Mode.   - If in Pump Mode, click **RUN** to enter Run Mode.
   - Plot and monitor IG_D2430:VP_RD while filling. Ion gauge reading will increase but should remain <1E-5 Torr when PPACs are running at full pressure.    - Plot and monitor IG_D2430:VP_RD while filling. Ion gauge reading will increase but should remain <1E-5 Torr when PPACs are running at full pressure. 
venting_pumping_intermediate_image_box.1704994742.txt.gz · Last modified: 2024/01/11 12:39 by noji

Page Tools

Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 4.0 International
CC Attribution-Noncommercial-Share Alike 4.0 International Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki