Fermi National Laboratory


Accelerator Update for June 29, 2005 - July 1, 2005

Wednesday June 29
The day shift began with Operations monitoring store 4241, with Anti Proton Source (Pbar) stacking, a Recyler Ring (RR) stash of 45.3E10,and with MiniBooNE, NuMI, and MCenter taking beam.

NuMI went down at 11:38 AM, when power supply E:HV101 ground faulted.

At 12:49 PM some of the RR correctors tripped off, this appeared to be caused by a power glitch and caused the Recycler to loose 33 E10 of its Pbars.

At 4:51 PM E:HV101 was repaired after they replaced a blown capacitor. NuMI resumed taking beam.

Beam began falling out of the Main Injector (MI) on the last NuMI injected batch at 8:00 PM, experts were called in to investigate and the problem was traced to the MI transverse damper system. After a reboot of the damper system beam returned to normal at 11:41 PM.

The store was terminated at 10:31 PM.

CDF and D0 both made accesses at 10:46 PM.

Both accesses were completed by midnight.

Thursday June 30
The midnight shift began with the Pbar stack at 155.3 E10, a RR stash of 5.8 E10, and with MiniBooNE, NuMI, and MCenter taking beam.

Shot Setup to Tevatron (Tev) started at 2:03 AM.

Operations established store 4243 at 4:42 AM with an initial luminosity of 72.36E30. Pbar and MCenter resume taking beam.

Shot setup to the Recycler began at 8:55 AM and was completed by 10:00 AM.

Pbar stacking was stopped at 1:l5 PM for 2 sets of studies. Stacking resumed at 5:13 PM.

Friday July 1
The midnight shift began with Operations monitoring store 4243, with the Pbar stack at 124.2 E10, a RR stash of 54.1E10,and with MiniBooNE, NuMI, and MCenter taking beam.

Store 4243 was terminated at 5:07 AM.

CDF went into access at 5:16 AM, access was completed at 6:16 AM.

Shot Setup to Tev started at 7:31 AM.

The Plan for Friday and the Weekend
The plan for the weekend is to stack, stash, and store.


Accelerator Update Archive

More Information
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last modified 7/1/2005   email Fermilab