Log entry time 17:02:30 on March 10,2004

Entry number 79057

RC Summary

Monday, 8 Mar. owl
through
Wednesday, 10 Mar. day

• Beam off for maintenance period. Target warm and no shifts staffed.
  
  

Achievements and events

• Lots of meetings.
  
  
  

Plans

• We are down for a maintenance period until (at least)
  Thursday swing. Update on task list:
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  

  Task	G0 Responsible	Work	Done
  Install TLDs	McKee/Martin/Williamson		50%
  Replace IOCSE20	Williamson	MCC(?)	100%
  Install more green blocks. (?)		Hall C	100%
  Resolve "SMS PLC crash/freeze leads to fastsump"	Williamson		In progress
  SMS/target (?) vacuum pump maintenance	Spayde	Brindza
  Position/Energy modulation coil checkout/maintenance	Rutledge		100%
  G0 harp signal noise	Williamson		in progress
  Harp PMTs connect/checkout HV and signals	Vulcan
  Install Halo 7,8	Phillips		90%
  Fix BPMs C07, C20	Pitt	P. Francis	in progress
  Pivot BPM noise resolution(?)
  Vacuum photodiode	Pitt		100%
  Laser phase noise	Nakahara	Poelker/Graims	100%
  Laser circular polarization			in progress
  Musson box timing issues		Musson	99%
  FastSEE software issues		Dickson (?)
  Channel 16 HV cable move and software fixes	Breuer		50%
  CHC UPSs	Vulcan		100%
  Survey SMS vs. FPDs (?)	Roche
  Recovery plan	Martin/King		in progress

  
  
  
  
  
• My impression of the recovery and run plan for the next few days:
  
  
  
  • Plan to cool down target 3/11 afternoon.
    
  • On physics beam back (expected 3/12 4 pm) 1 shift beam checkout.
    
  • Weekend: longitudinal running on LH2.
    
  • Monday, 9 am: Hall C spin dance (decided at today's weekly PD meeting).
    Leave Wien angle at best transverse setting and begin transverse running
    (about 4 days according to Paul King's plan).
    
  
  
  

Concerns and Their Resolution

• Spikes in the French timing spectra appear from time to
  time. Still under investigation by Jacques with analysis by Sarah.
  
  
• Hope to resolve G0 BPM and harp issues by simply running harps
  at higher current (40 uA CW possible, relayed by Vulcan from Yan, as
  the wires are carbon). Williamson still diagnosing harp noise.
  
  
• Williamson working on design of magnet power supply off
  at full power without causing fast dump and without
  compromising quench protection.
  
  
• IOCSE20 replaced.