Log entry time 00:08:04 on May 05, 2012

Entry number 382281

Swing Shift Summary

Summary

The shift started with no beam since the previous shift was just finishing the back out from the Moller measurements. MCC then called to say that they couldn't deliver beam to the hall because the Moller target was in, but after an investigation, it was found that the Moller target was out, and that the real problem was that the IOC associated with this FSD had to be rebooted. We then did the dilution runs we needed for this setting, and started production running. After a few hours of production running, both septa tripped off. Dustin and Jessie went down into the hall to investigate the trip and found that the water line for the big bite power supply ruptured which dumped water all over the place before they got the valves turned off. Ed arrived and headed down, and the clean up commenced.

Photos of water in the hall: elog 1782244.

Timeline

• 16:00 - Shift starts with no beam at the end of the backout of the Moller setup.
• 16:10 - MCC calls and says they cannot deliver beam because our Moller target is in. We verify that the target is out with the very dim camera. After a 40 minutes of trouble shooting, we aks that they reboot the IOC for this FSD, and the problem clears up.
• 17:00 - Beam back in the hall. We adjust the beam positions and do spot++ checks.
• 17:30 - We start by taking our dilution runs on the carbon target, the dummy target (cross hairs), and in the home position.
• 18:00 - Setting up for production running, going to ammonia target, and polarizing it.
• 18:45 - We are having a little trouble: the target won't polarize above 70%, which is a little borderline. We decide to go forward and take a run while Dustin talks to James.
• 19:01 - Changing to the top ammonia cup; starting to polarize it.
• 19:20 - We have 50 nA and are resuming production running on the top cup, which has a polarization of about 77.5%.
• 20:06 - MCC is taking the beam away to walk up a cavity that is giving them trouble. It should only be a few minutes. We'll stop this run and start a new one when the beam is back.
• 20:15 - Beam is back! Starting another run... (5656 and 24374)
• 20:22 - Fast raster reduced to 1.5 mm by 1.5 mm by Pengjia's request because he says things are saturating.
• 21:15 - Septa have both tripped. Calling the tech on call, and calling MCC to make an access.
• 22:27 - Dustin and Jessie went down into the hall to investigate the cause of the trip. The water line for the big bite power supply ruptured, and there is water all over the floor of the hall. The valves have been turned off. Ed is on his way in.
• 22:45 - Ed arrives and went down into the hall. They are all cleaning up the water.
• 24:00 - Still down, trying to dry out the hall and assess the damage.

Notes for the next shift:

• If MCC cannot deliver beam due to an FSD on the Moller target when you know the target is out, ask them to reboot the IOC.
• Flip ihwp about halfway through each point.
• Do a dilution run for each point
• Do 2/3 with the right arm before moving to the next point.
• Keep an eye on the beam current so it doesn't drift down to 40 nA.

Runs Taken

• Run 5646: Spot++,target=Carbon hole, p0=2.2279, beam position check
• Run 5647: Spot++,target=Carbon hole, p0=2.2279, beam position check
• Run 5648: Spot++,target=Carbon hole, p0=2.2279, raster size check

• Run 5645: Dilution, target=Home(no target, or empty), p0=2.2279
• Run 5649: Dilution, target=C12_40, p0=2.2279
• Run 5650: Dilution, target=Dummy, p0=2.2279
• Run 5651: Dilution, target=Home(no target, or empty), p0=2.2279

• Run 24365: Dilution, target=Home(no target, or empty), p0=1.7348
• Run 24366: Junk Run, target=Home(no target, or empty), p0=1.7348
• Run 24367: Dilution, target=C12_40, p0=1.7348
• Run 24368: Dilution, target=Dummy, p0=1.7348
• Run 24369: Dilution, target=Home(no target, or empty), p0=1.7348

• Run 5652 (p0=2.2279, NH3 bottom) - 4.5 M
• Run_5654,(p0=2.2279, NH3 top) - 7.0 M
• Run_5655,(p0=2.2279, NH3 top) - 5.2 M
• Run_5656,(p0=2.2279, NH3 top) - 7.0 M (beam positions wandered in first minute of run, fast raster changed to 1.5 by 1.5 in this run.)
• Run_5657,(p0=2.2279, NH3 top) - 7.0 M
• Run_5658,(p0=2.2279, NH3 top) - 1.5 M (septa tripped at end of this run)

• Run 24370 (p0=1.7348, NH3 bottom) - 3.6 M
• Run 24372 (p0=1.7348, NH3 top) - 5.6 M
• Run 24373 (p0=1.7348, NH3 top) - 4.0 M
• Run 24374 (p0=1.7348, NH3 top) - 5.6 M (beam positions wandered in first minute of run, fast raster changed to 1.5 by 1.5 in this run.)
• Run 24375 (p0=1.7348, NH3 top) - 5.3 M
• Run 24375 (p0=1.7348, NH3 top) - 1.1 M (septa tripped at end of this run)

• Run 5653

• Run 24371