Fermi National Laboratory

Accelerator Update

Monday December 15
The day shift began with the Tevatron (Tev) turning on, stacking in the Antiproton Source (Pbar), and with beam to MiniBoone.

At 8:25 AM we had circulating beam in the Tev.

Switchyard 120 (SY120) studies began at 11:00 AM and ended at 2:00 PM.

At 1:00 PM an access was made into the Tev to replace a bad turbo vacuum pump.

Tev is back up at 5:00 PM.

SY120 turns back on at 9:00 PM.

At 11:11 PM the Tev quenched at A11, while at low beta.

Tuesday December 16
Beam returns to the Tev at 1:20 AM.

At 9:21 AM the Tev begins a 36 X 0 store.

From 11:30 AM to 1:40 PM the Recycler Ring (RR) has been sending Pbars to the Main Injector (MI).

At 2:18 PM the Tev is taking the proton store to 980 Gev.

At 2:40 PM the Tev quenched at D4.

The Tev was once again ramping at 6:08 PM.

At 6:30 PM the Tev quenched once again at D4.

Access was made into the Tev at 10:12 PM to investigate the cause of the quench.

Wednesday December 17
The midnight shift begins with Pbar stacking, Miniboone taking beam, Booster studies, and investigation of the Tev quenches.

At 1:47 AM the Pbar source broke the stack record of 236 mA. The new record is 245.017 mA.

Booster studies ended at 3:21 AM.

At 7:11 AM a Tev access is being made to check a damping resistor that could be the cause of the problems at D4.

Today's Plans
Repair the Tev and return to normal operations (stack and Tev stores).

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 12/17/2003   email Fermilab