Fermi National Laboratory

Accelerator Update for November 1, 2006 - November 3, 2006


Wednesday November 1

The day shift began with the Tevatron (TeV) off for sector E4 vacuum repairs (this required the E4 cryo system to be warmed up), with Operations monitoring the Recycler stash (208.1E10), with the Antiproton Source (Pbar) conducting stacking studies, with Linac, Booster, and the Main Injector (MI) operating normally, with MiniBooNE and NuMI taking beam when available, and with the Collider Detector at Fermilab (CDF) and D-Zero (D0) in access.

A MI expert began a slipstacking study at 10:41 AM, which lasted about six hours.

A Recycler expert began a study period around 5:30 PM.

Pbar studies ended and Operations resumed normal stacking at 6:14 PM.

Operations turned off all beam at 10:03 PM in preparation for an access into TeV sectors A-E, F sector, and MI.

Thursday November 2

The midnight shift began with the TeV off, with Operations monitoring a small stash (3.7E10) and the stack (44.5E10), and with all beam other off.

At 1:21 AM, Operations reported that the TeV access was beginning.

Cryo technicians reported at 3:09 AM that the E4 cryo system was warm.

Booster experts began a study period at 8:55 AM.

Vacuum techs reported at 10:01 AM that they had found a decomposed O ring at E4.

Pbar experts began a study period at 1:37 PM.

Operations established beam to Booster at 3:54 PM.

At 8:22 PM, vacuum experts reported that the TeV E4 vacuum was being brought up to atmosphere. Operations reported that the E3 vacuum was degrading.

Friday November 3

The midnight shift began with the TeV in access for vacuum work, with MI in access, and with Pbar stacking (26.5E10).

Operations prepared the Booster for access at 5:37 AM.

The Plans for Friday and the Weekend

The plan for today is to continue the TeV vacuum work and allow work in NuMI, MI, Booster, and MI-8. The plans for the weekend are to have all the TeV vacuum work finished by Saturday and start the TeV cooldown. The E4 cryo system should be cold by late Sunday night. If this schedule holds, the TeV start up will begin on Monday and the first store would go in on Tuesday.

Accelerator Update Archive

More Information
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last modified 11/03/2006    email Fermilab