Log entry time 00:08:59 on May 11, 2012

Entry number 383799

Swing Shift Summary

Summary

We did the optics plan, and then we started taking the packing fraction runs in preparation for production running.

Timeline

• 16:00 - Shift starts with no beam, but MCC is just starting to send beam for the optics plan.
• 16:07 - The beam current is rather unstable, jumping about 20 nA, so I called MCC and asked if they could do soemthing about it. They said that they would try.
• 16:10 - We check that we can see the beam spot in the local dump using the viewer camera. WE can see the spot! The room cheers! Starting the carbon runs for the optics running at 100 nA.
• 16:35 - Moving to the CH2 hole target to take our next point.
• 16:38 - MCC says they need to adjust our laser phase since it seems to be off, which will take about 10 minutes. We are taking data while they do this.
• 16:54 - MCC calls. They'd like to close the slit a little to cut down on the current fluctuations. We tell them to go ahead, and they close the slit from 14.00 to 13.00.
• 17:44 - Moved to C12_40 target to get data on that target again.
• 18:06 - We finished that data taking, so we are turning on the fast raster (at 2 by 2) and the slow raster (at 1.4V by 1.7V).
• 18:32 - Masking the slow raster to set it for the position scans, and turning off the fast raster.
• 18:38 - Taking data now...
• 19:08 - Changed the slow raster for the next point; now taking data!
• 19:29 - The beam current and the beam energy have been wandering around during the time that Hall C has been down (they are backing out of a Moller measurement) and while they are being tuned back up. I talked to MCC about it, and they are trying to compensate, but our current and energy values will wander until Hall C is back up and stable, since the lock depends on them. I logged a strip tool in halog 383741 and halog 383758.
• 19:47 - Hall C wants to flip the IHWP. We'll finish this run and flip the IHWP.
• 19:54 - The IHWP is now OUT!
• 19:55 - We are setting up for a short run for the diagonal position scan. Taking the run...
• 19:58 - The target is getting too hot, so we are calling for the beam to be off. We are ramping down the right septum magnet during this time so it isn't sitting at high current for no reason.
• 20:08 - We have ramped back up the right septum and asked for 100 nA so we can finish the diagonal scan.
• 20:20 - Changing the right to 2.203 and the left to 2.203. We are also waiting a few minutes without beam to cool the target.
• 20:40 - Started taking data again...
• 20;54 - Asked for beam off to cool the target while we change the left setting to 2.183 (right is at 2.203).
• 21:04 - Taking data again. We dropped to 50 nA (instead of 100 nA), since the target was heating up too much too quickly.
• 21:34 - changing the left to 2.299 (cycling Q2 and Q3 first). Jixie is calling the target on call (Dustin) to see if he wants to co in the hall when we go into the hall to change the sieve (to out).
• 21:43 - Starting data taking again!
• 22:00 - The poor local dump viewer camera is dying. The poor thing's signal is more snowy and grey.
• 22:25 - Changing the right setting to 2.251 (still running on the left right now).
• 22:40 - The run is done, so we are going to controlled access to take the sieves out. We are also changing the left arm momentum setting to 2.251. Alex is also going to go into the hall (to change the gas for the MRPC).
• 23:09 - The sieve is out! Hall back to power permit.
• 23:14 - Back in beam permit!
• 23:18 - We have beam, 50 nA. Starting our run!
• 23:26 - Now we will do a run with the fast raster on, at 1.5 mm by 1.5 mm, and the slow raster on (1.4 by 1.7).
• 23:34 - Slow raster set, starting our run!
• 23:40 - I think we are done with the optics plan. We are moving on to production running. Resetting the left HRS to 2.2279. Refilling the nose of the target. We'll start with the packing fraction run.
• 23:47 - Moving the NH3 target in. We put in the bottom target, since we didn't have instructions as to which to use.
• 23:51 - Target is in, requesting back 50 nA. Starting our packing fraction run on the left while the right settles.
• 23:57 - Going to the top cup to do the packing fraction run on the left while the right settles.
• 24:00 - End of shift! Running the packing fraction runs in preparation for production running!

Notes for the next shift:

• Keep an eye on the energy value to make sure it doesn't wander.
• Hall C is now in control of the IHWP, so keep track of when they flip it. Ideally, you want an ihwp flip about halfway through each point. If they don't flip it for some reason, make sure that you do.
• Keep an eye on the beam current so it doesn't drift down to 40 nA. Keep and eye on the beam positions too.
• 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.

Runs Taken

• Run_5927,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. LHRS p0 = 2.251 GeV. dp=0%
• Run_5928,Run_type=Optics,target_type=CH2 hole,comment_text=Optics. W/O LHe. LHRS p0 = 2.251 GeV. dp=0% MCC changing laser phase
• Run_5929,Run_type=Optics,target_type=CH2 hole,comment_text=Optics. W/O LHe. LHRS p0 = 2.251 GeV. dp=0%
• Run_5930,Run_type=Optics,target_type=CH2 hole,comment_text=Optics. W/O LHe. LHRS p0 = 2.251 GeV. dp=0%
• Run_5931,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. LHRS p0 = 2.251 GeV. dp=0%
• Run_5932,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. LHRS p0 = 2.251 GeV. dp=0% Fast and slow rasters On
• Run_5933,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. LHRS p0 = 2.251 GeV. dp=0% beam position x-scan
• Run_5934,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. LHRS p0 = 2.251 GeV. dp=0% beam position y-scan
• Run_5935,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. LHRS p0 = 2.251 GeV. dp=0% beam position y-scan
• Run_5936,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. LHRS p0 = 2.251 GeV. dp=0% beam position diagonal-scan
• Run_5937,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. LHRS p0 = 2.251 GeV. dp=0% beam position diagonal-scan
• Run_5938,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. LHRS p0 = 2.203 GeV. dp=2.X%
• Run_5939,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. LHRS p0 = 2.183 GeV. dp=3%
• Run_5940,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. LHRS p0 = 2.299 GeV. dp=-2.X%
• Run_5941,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. LHRS p0 = 2.251 GeV. Rasters Off, Sieve OUT
• Run_5942,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. LHRS p0 = 2.251 GeV. Sieve OUT, slow raster 1.4 V x 1.7 V, Fast raster 1.5 mm x 1.5 mm
• Run_5943,Run_type=Other,target_type=NH3 bottom,comment_text=Packing fraction on Bottom NH3.

• Run_24614,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/ LHe. RHRS p0 = 2.251 GeV. Pointing.
• Run_24615,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/ LHe. RHRS p0 = 2.251 GeV. dp=0%
• Run_24616,Run_type=Optics,target_type=CH2 hole,comment_text=Optics. W/ LHe. RHRS p0 = 2.251 GeV. dp=0% MCC changing laser phase
• Run_24617,Run_type=Optics,target_type=CH2 hole,comment_text=Optics. W/O LHe. RHRS p0 = 2.251 GeV. dp=0%
• Run_24618,Run_type=Optics,target_type=CH2 hole,comment_text=Optics. W/O LHe. RHRS p0 = 2.251 GeV. dp=0%
• Run_24619,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. RHRS p0 = 2.251 GeV. dp=0%
• Run_24620,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. RHRS p0 = 2.251 GeV. dp=0% Fast and Slow Rasters On
• Run_24621,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. RHRS p0 = 2.251 GeV. dp=0% Beam Position x-scan
• Run_24622,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. RHRS p0 = 2.251 GeV. dp=0% Beam Position y-scan
• Run_24623,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. RHRS p0 = 2.251 GeV. dp=0% Beam Position y-scan
• Run_24624,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. RHRS p0 = 2.251 GeV. dp=0% Beam Position diagonal-scan
• Run_24625,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. RHRS p0 = 2.251 GeV. dp=0% Beam Position diagonal-scan
• Run_24626,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. RHRS p0 = 2.203 GeV. dp=2.X%
• Run_24627,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. RHRS p0 = 2.203 GeV. dp=2.X%
• Run_24628,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. RHRS p0 = 2.251 GeV. Rasters Off. Sieve OUT.
• Run_24629,Run_type=Optics,target_type=C12_40,comment_text=Optics. W/O LHe. RHRS p0 = 2.251 GeV. Sieve OUT. Fast raster 1.5 mm x 1.5 mm, slow raster 1.4 V x 1.7 V

• Run_41941,Run_type=Optics,target_type=C12_40,comment_text= beam position scan
• Run_41942,Run_type=Optics,target_type=C12_40,comment_text= beam position scan
• Run_41943,Run_type=Optics,target_type=C12_40,comment_text=diagonal beam position scan