Fermi National Laboratory

Accelerator Update

The integrated luminosity for last week was 6.8 pb-1

Monday August 11
The day shift started in shot setup and Miniboone taking beam.

At 9:44 AM a quench at B1 ended shot setup.

We returned to AntiProton Source (Pbar) stacking and began quench recovery.

The quench investigation eventually lead to the C49 separator, they eventually removed the reversing switch from the power supply.

At 2:30 PM an access to the Tevatron (Tev) was made to a look at the F4 vacuum.

The Tev access was completed by 6:30 PM, at which time the Tev turn-on ensued.

During the Tev startup a quench at BB occurred at 8:00 PM.

Quench recovery was completed by 9:30 PM, Tev turn-on then resumed.

Tuesday August 12
Shot setup started at 12:15 AM.

The store was lost at 1:53 AM when a B1 quench occurred during the low beta squeeze.

Stacking resumed and quench recovery began.

Tev was back on by 4:45 AM.

Another low beta quench occurred at 5:25 AM, experts began investigation.

The day shift began with the quench investigation continuing, stacking and beam to Miniboone.

At 9:45 AM Vacuum techs accessed the Tev to check vacuum in the quench related areas. No problem/cause were found.

Quench recovery was complete by 10:13 AM.

At 11:47 AM, D0 made a controlled access. The access was complete by 12:37 AM.

The Tev was back on by 1:00 PM.

Tev checkout and quench investigation continue while we wait for the stack to reach 120ma.

Switchyard, and Slipstacking, studies began approximately at 4:16 PM.

All studies were completed by 7:51 PM.

Shot setup for the Tev began at 8:08 PM, with store #2898 colliding by 9:46 PM with an initial average luminosity of 39.00e30.

We then returned to stacking.

Wednesday August 13
The midnight shift started with store #2898 colliding, stacking, and beam to Miniboone.

No problems the rest of the midnight shift.

Today's Plan
Stack and shot and continue sending beam to MiniBoone.

Accelerator Update Archive

More Information
For Tevatron luminosity charts and the current status of Fermilab's accelerators and detectors (live!), please go to Fermilab Now

Comments and Suggestions
What do you think about the Accelerator Updates? Please send comments and suggestions to: accelupdates@fnal.gov.

last modified 8/13/2003   email Fermilab