08 November 2007

RHIC Startup: Reducing the beam rigidity with F6 did not allow for stable running.  So it was decided that there is no acceptable alternative to going in to the A5 to shorten the pulse.  It may be possible to change the tap on the A5 PFN to shorten the pulse.  Probably only the central module of the A5 will need to be pulled out, allowing access to the other two modules that way.
So the schedule for 9 Nov is:

• Friday 09 November -- AGS Access to modify PFN for A5 injection kicker -- List of Jobs

  • 0400:                Beam activity ends, CA LOTO to be applied to AGS.  [see equvialent LOTO for L20X & L20X']

  • 0410:                Close AGS Vacuum (sector) Valves at A3 & A13 (pet)

  • 0500:                CA Access to AGS for HP survey of A5 kicker.  

  • 0530                STAR and Phenix to RA before 0600 -- get Phenix plug door opened.

  • 0600:                Pulsed Power Supply Group (A5 kicker) personnel to enter ring.  

  • 0800                 RHIC PASS zone 2 (1z1, 1z2, 2z2) to RA at 0800 or earlier

  • Before1000:       All personnel out of ring -- REVIEW GATE LOG SHEET TO MAKE SURE ALL ARE ACCOUNTED FOR.

  • 1000-1200:        re-access ring as necessary.

  • 1200:                Remove LOTO from AGS.

  • 1300:                Restore beam to W dump.

It is anticipated that the A% work can be done in parallel to the Yellow bus work.

Last night there was an accidental quench of the DX at 5022A.  After the quench, there were several cycles of the DX shutoff at 4146A.

AGS RF cavities kept tripping off because the RF was left in CW mode.  This indicates that the RF needs to be included in the sequencer. 

AtR BPMs are not triggering properly.  Loss Monitors do not work in the first turn  mode.  They need circulating beam to work. 

As of 8 Nov 6:45:45 there was circulating deuterons in Blue with good lifetime.  Intensities of 0.5E11 were recorded with 85% injection efficiency.  RF was turned on at 7:51:30.  We need the Abort Kicker and Loss Monitors working for tonight.