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iocnl07rffcc7 restored

Recent Log Entries -

Log Number: 3814176Logbook(s): Tags: Body: restorelib 2.1 Target restore date was 2020-07-11 12:25:51 The output from the myRestore execution was as follows: iocnl07rffcc7 Rf12Fcc Pause: 60 second(s) Execute: /cs/opshome/burt/REBOOT/Rf12Fcc/DLOAD_ICAL.csh iocnl07rffcc7 (success) c100_rffcc@2020-07-11 12:25 32(32) restored Execute: burtwb -r 3 -f /cs/opshome/burt/REBOOT/Rf12Fcc/snap-ecal/iocnl07rffcc7-ecal.snap (success) Execute: burtwb -r 3 -f /cs/opshome/burt/REBOOT/Rf12Fcc/snap-exp/iocnl07rffcc7-exp.snap (success) Execute: /cs/opshome/burt/REBOOT/Rf12Fcc/GGTmyRestore.csh iocnl07rf

iocnl07rffcc7 restored

Recent Log Entries -

Log Number: 3814175Logbook(s): Tags: Body: restorelib 2.1 Target restore date was 2020-07-11 12:25:51 The output from the myRestore execution was as follows: iocnl07rffcc7 Rf12Fcc Pause: 60 second(s) Execute: /cs/opshome/burt/REBOOT/Rf12Fcc/DLOAD_ICAL.csh iocnl07rffcc7 (success) c100_rffcc@2020-07-11 12:25 32(32) restored Execute: burtwb -r 3 -f /cs/opshome/burt/REBOOT/Rf12Fcc/snap-ecal/iocnl07rffcc7-ecal.snap (success) Execute: burtwb -r 3 -f /cs/opshome/burt/REBOOT/Rf12Fcc/snap-exp/iocnl07rffcc7-exp.snap (success) Execute: /cs/opshome/burt/REBOOT/Rf12Fcc/GGTmyRestore.csh iocnl07rf

iocnl07rffcc7 restored

Recent Log Entries -

Log Number: 3814173Logbook(s): Tags: Body: restorelib 2.1 Target restore date was 2020-07-11 12:14:33 The output from the myRestore execution was as follows: iocnl07rffcc7 Rf12Fcc Pause: 60 second(s) Execute: /cs/opshome/burt/REBOOT/Rf12Fcc/DLOAD_ICAL.csh iocnl07rffcc7 (success) c100_rffcc@2020-07-11 12:14 32(32) restored Execute: burtwb -r 3 -f /cs/opshome/burt/REBOOT/Rf12Fcc/snap-ecal/iocnl07rffcc7-ecal.snap (success) Execute: burtwb -r 3 -f /cs/opshome/burt/REBOOT/Rf12Fcc/snap-exp/iocnl07rffcc7-exp.snap (success) Execute: /cs/opshome/burt/REBOOT/Rf12Fcc/GGTmyRestore.csh iocnl07rf

iocnl07rffcc7 restored

Recent Log Entries -

Log Number: 3814171Logbook(s): Tags: Body: restorelib 2.1 Target restore date was 2020-07-11 11:50:19 The output from the myRestore execution was as follows: iocnl07rffcc7 Rf12Fcc Pause: 60 second(s) Execute: /cs/opshome/burt/REBOOT/Rf12Fcc/DLOAD_ICAL.csh iocnl07rffcc7 (success) c100_rffcc@2020-07-11 11:50 32(32) restored Execute: burtwb -r 3 -f /cs/opshome/burt/REBOOT/Rf12Fcc/snap-ecal/iocnl07rffcc7-ecal.snap (success) Execute: burtwb -r 3 -f /cs/opshome/burt/REBOOT/Rf12Fcc/snap-exp/iocnl07rffcc7-exp.snap (success) Execute: /cs/opshome/burt/REBOOT/Rf12Fcc/GGTmyRestore.csh iocnl07rf

Follow-up Re: Status Update

Recent Log Entries -

Log Number: 3814170Logbook(s): Body: 

Fire protection on site to turn off VESDA. Frank requested this, because the pump he is using could set it off and he wanted to be on the safe side. Tim Minga must be contacted to turn VESDA back on after pumping is completed.

Status Update

Recent Log Entries -

Log Number: 3814169Logbook(s): Entry Makers: bfreemanBody: 

Cryo Coordinator has been paged and emailed with the 1L12 status. We are now in Restricted Access in the NL, and Frank is on site and getting ready.

8am Meeting Summary

Recent Log Entries -

Log Number: 3814165Logbook(s): Body: 

See Jay's entry (https://logbooks.jlab.org/entry/3814154) it was decided to proceed under the assumption the turbo pump had tripped and a larger scroll pump was needed. M. Drury will contact Frank Humphrey and TJ to come in. Once they are on the way the NL will go to Restricted so the pump can be moved into position and connected. Scroll pump will also be attached to the waveguides.

OPS (Freeman) will contact cryo on-call and update.

CREW CHIEF SIGN IN

Recent Log Entries -

Log Number: 3814158Logbook(s): Body: 
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM

Date : 07-11-20
Time : 07:19:48
Day : Saturday
Shift : Day

Crew Chief : Freeman
Program Deputy: McGuckin
Team : -
LERF Operator:
Operators :

This stamp certifies that the above Crew Chief has read/reviewed/received the following:

1L12 status

Recent Log Entries -

Log Number: 3814154Logbook(s): Tags: Entry Makers: beneschBody: 

As first linked entry reports, the access around 2130 showed tuners still frozen. Heater heat was left on at 50 W (green in bottom panel) until I asked the SSO to turn it off a few minutes ago. The four Minco heaters are at least 10 cm square each and are good for 1 W/cm^2 in air, so 12.5 W each in helium gas below 200K will not have damaged them.

As the top panel indicates, diodes are reading mean of about 160K so the tuners should be free by now.

Operator SIGN IN

Recent Log Entries -

Log Number: 3814148Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Surles-Law
DATE:             07/11/2020
SHIFT:               Owl

The operator has read the following:

1L12 update (JB)

Recent Log Entries -

Log Number: 3814125Logbook(s): Entry Makers: beneschBody: 

Figure 1 shows the whole day. Upper pane is "cooldown" diodes. Middle is beamline and waveguide vacuum. Bottom is cryo signals. The variations around 1300 were caused by L-tube and RT valve work. JT closed about 1750. I don't know why the 2K outlet temp (1260) went to 180K during the L-tube work.

Figure 2 shows the last four hours. One sees in the lowest pane the JT closing in steps starting at 1750. Liquid level rises because the electric heaters were putting out 225 W and there was lots of cold gas moving by the sensor.

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