Swing Shift Summary for Saturday, November 14, 2009

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User name Sarah

Log entry time 00:16:47 on November 15, 2009

Entry number 299937

keyword=Swing Shift Summary for Saturday, November 14, 2009

Swing Shift Summary for Saturday, November 14, 2009

The Shift Crew:

Sarah K. Phillips, shift leader and DAQ wrangler
Paul King, target wrangler

Back Room Expert:

Dian Cheng

Special Guest Appearances by:

Seamus Riordan, run coordinator
Alexandre Camsonne, Compton expert
Mark Dalton, conversationalist
Bob Michaels, DAQ expert
Rupesh Silwal, PITA master

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Highlights:

16:00 - 17:04 -> Production running
17:04 - 17:50 -> Access to hall to put in Compton shielding and do
something to the DAQ
17:50 - 18:48 -> Beam recovery procedure
18:48 - 21:52 -> Production running
21:52 - 23:20 -> adaql1 dies and parity DAQ fails; Bob comes in to help
us get it going
23:20 - 23:30 -> No beam (MCC took it to fix magnet trim card at 23:00).
23:30 - 24:00 -> Production running

The Run Plan:

1. Production Running
2. Hall access to put some shielding in around the Compton photon detector
2. More production running

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The Run Down

16:00 - Shift starts off with production running

17:04 - Access to the hall: Alex goes into the hall for an escorted
access to put shielding around the photon detector. Alex, Meghan, and
Dian Cheng went into the hall. Xiaochao also asked them to do some DAQ
work in the hut on the left arm..

17:44 - Going to the empty target in preparation for getting beam back.

17:50 - Everyone is out of the hall and we are starting our beam startup
procedure. Only one harp (Harp B) was scanned, because harp A isn't
working tonight.

18:42 - Everything looks good; ramping down the VDCs to go back to
production running.

18:48 - Going back to production running!

19:25 - we go down to 98 muA to see if that helps with the beam trips.

20:05 - MCC is having BLM trip issues, which is making our beam so
unstable. They have dropped us to 90 muA and are trying to edge it up to
100muA.

20:20 - We are steady at 90 muA right now, while MCC is investigating.
Seamus says to stick at the steady 90 muA if we have to, and Paul's
calculations back this up.

21:30 - It sounds like we may be at 90 muA for the night. MCC is still
trying to get us to a higher beam current, but whenever they do, we just
jump up to 20 trips per hour. The trip rate is dropped in half by going
to 90 muA.

21:52 - The parity DAQ fails to start the next run, so we go to do a CODA
reboot, but adaql1 refuses to respond, and we cannot even ssh into the
machine. I page Bob, who says that we can reboot the machine. The
reboot fails completely...it won't even come up with a boot screen. We
run out of options pretty quickly, and call Bob again, and he is on his
way in. As a side note, the beam is fairly stable right now. We are
taking data on the two spectrometer DAQs, but the logbook numbering is
messed up and we have lost our beamtime accounting. The last parity run
is also stuck somewhere on adaql1. Alexandre comes in and agrees that
the thing is "screwed up".

22:25 - Bob arrives and starts working on adaql1. He gets it to come
back up, and gets CODA running (run 13961), but it starts having issues
after a while. Bob does a full reboot of CODA again, as well as all
crates. After reboots, we see that Ole posted a halog not to reboot.
Oops... But we are running again.

23:00 - MCC called. The beam will be gone for a little bit while they
change a magnet trim card. It shouldn't take long.

23:20 - DAQ up and going, but no beam.

23:30 - Beam comes back! We do the spot++ checks and go to production
running again. We're at 85 muA at the moment.

23:50 - The Pockels cell's negative setting has gone from 7 to 0.9 since
the last time that we were successfully running, and the pita now has a
slope of -20790. Our charge asymmetry has gone from -10 to -3500 ppm.
We are on the phone with Rupesh to figure out what is going on. See
halog 299935. He is coming in.

24:00 - We are in production running mode, but Rupesh is on his way in to
correct the Pockels cell issue. I think that we found everything that we
need to have going that was on adaql1, but the next shift crew is being
made aware that we had some issues. Rupesh has arrived to fix the
Pockels cell settings, and things seem to be smoothing out a bit in general.

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The Run List

* Production runs:

Run 13955 - Parity Production run at 100 muA Okay pairs: 38.5 k
Run 5030 - Right HRS Production run at 100 muA
Run 25479 - Left HRS Production run at 100 muA

Run 13956 - Parity No beam run
Run 5031 - Right No beam run
Run 25480 - Left No beam run

Run 5032 - Right HRS spot++, BeO target, 2.5 mm by 2.5 mm at 10 muA
Run 25481 - Left HRS spot++, BeO target, 2.5 mm by 2.5 mm at 10 muA
Run 5033 - Right HRS spot++, LD2 target, 2.5 mm by 2.5 mm at 2 muA
Run 25482 - Left HRS spot++, LD2 target, 2.5 mm by 2.5 mm at 2 muA
Run 5034 - Right HRS spot++, LD2 target, 4 mm by 4 mm at 2 muA, Q^2
measurement
Run 25483 - Left HRS spot++, LD2 target, 4 mm by 4 mm at 2 muA, Q^2
measurement

Run 13957 - Parity Production run at 100 muA Okay pairs: 31.3k
Run 5035 - Right HRS Production run at 100 muA
Run 25484 - Left HRS Production run at 100 muA

Run 13958 - Parity Production run at 90 to 98 muA Okay pairs: 26.0k
Run 5036 - Right HRS Production run at 90 to 98 muA
Run 25485 - Left HRS Production run at 90 to 98 muA

Run 13959 - Parity Production run at 90 muA Okay pairs: 32.5k **
adaql1 crash at end of this run! **
Run 5037 - Right HRS Production run at 90 muA
Run 25486 - Left HRS Production run at 90 muA

*No parity DAQ run associated with these runs*
Run 5038 - Right HRS Production run at 90 muA
Run 25487 - Left HRS Production run at 90 muA

Run 13960 - Parity: Non-existent
Run 13961 - Parity: Test run by Bob.

Run 13962 - Parity: No beam
Run 5039 - Right HRS Production run (No beam)
Run 25488 - Left HRS Production run (No beam)

Run 5040 - Right HRS spot++, LD2 target, 4 mm by 4 mm at 2 muA
Run 25489 - Left HRS spot++, LD2 target, 4 mm by 4 mm at 2 muA

Run 13963 - Parity Production run at 85 muA Okay pairs: running...
Run 5041 - Right HRS Production run at 85 muA
Run 25490 - Left HRS Production run at 85 muA