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Entry  Mon Dec 6 14:26:52 2021, Koji, Update, VAC, Pumping down the RGA section 
    Reply  Tue Dec 7 13:12:50 2021, Koji, Update, VAC, Pumping down the RGA section 
       Reply  Wed Dec 8 10:14:43 2021, Jordan, Update, VAC, Pumping down the RGA section 40m_RGAVolume_12_8_21.PNG40m_RGAVolume_Torr_12_8_21.PNG
          Reply  Fri Dec 10 19:22:01 2021, Koji, Update, VAC, Pumping down the RGA section 
Message ID: 16493     Entry time: Tue Dec 7 13:12:50 2021     In reply to: 16490     Reply to this: 16494
Author: Koji 
Type: Update 
Category: VAC 
Subject: Pumping down the RGA section 

So that Jordan can run the RGA scan this afternoon, I ran TP3 and started pumping down the RGA section.

Procedure:
- Same 1~4
- Same 5
- 6 Opened only the backing path for TP3
- 7 Turned on TP3 only

- TP3 reached the nominal full speed @75kRPM

- 11 Opened V5 to pump the pump spool -> Immediately reached P3<1e-4
- 12 Opened VM3 to pump the RGA section -> Immediately reached P4<1e-4

The pumps are kept running. I'll come back later to shut down the pumps.
=> Jordan wants to heat the filament (?) and to run the scan tomorrow.
So we decided to keep TP3 running overnight. I switched TP3 to the stand-by mode (= lower rotation speed @50kRPM)

 

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