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In this issue:
Buttons and Bellows for PEP-II
Profile: Joanne Bogart
Volunteers Still Needed for Science Bowl

SLAC Today

Wednesday - January 17, 2007

Buttons and Bellows for PEP-II

At the center of the photo is the new bellows unit recently installed on the forward side of the BaBar detector.

The Accelerator Systems Division has buttoned up the PEP-II rings. Now the accelerator is ready once again to deliver beams to BaBar after a maintenance shut down, and the accelerator sports 650 new buttons. The buttons are part of the beam position monitors that keep track of the beam's exact location.

Early this year, in the final days before closing the doors to the BaBar detector, the accelerator division squeezed in one more upgrade task—adding a new bellows unit on the forward side of the detector. The bellows unit provides a flexible place where the two separate pipes carrying electrons and positrons join into a single beam pipe just before reaching the detector.

Both bellows and buttons caused trouble during the 2006 run, when higher currents coursing through the accelerator generated "higher order mode" radio frequency power. The excess power overheated buttons; six fell off and disturbed the beam, requiring down time to remove them from the beam pipe. Read more...

(Weekly Column - Profile)

Joanne Bogart:
Star of Stage and Lab

(Image - Joanne Bogart)
Joanne Bogart, inspired by her work at SLAC, dressed as a star in Giuseppe Verdi's "A Masked Ball" in 2003.

If you don't recognize GLAST programmer Joanne Bogart away from SLAC, it's probably because she's dressed as a nineteenth-century peasant, or a glittering star at a masquerade ball, or a haggard, eye-patched beggar woman. She wears the costumes not for her own amusement, but because she performs opera. "People think that opera is a really arcane art form that isn't enjoyable to watch. But it's really as much of a production as a play with lights, costumes, and sets. The music is terrific, but it's also very dramatically compelling," Bogart said.

Now the West Bay Opera's Chorus Manager, she began her musical career as a piano student who disliked classical singing. After meeting her husband, a fellow Stanford undergrad and an opera fan, she began to warm to the style. Read more...

Save the Date:
Science Bowl 2007

(Image - Science Bowl 2006)
Students participating in
Science Bowl 2006.

The DOE Regional Science Bowl comes to SLAC for the third consecutive year on February 10, 2007. More than 150 brilliant high school students from around the Bay Area will be at the lab to flex their scientific brawn in hopes of winning first prize and a trip to the National competition in Washington, D.C.

Resembling a quiz show, the Science Bowl is an academic competition that tests students' knowledge of mathematics and science. Student team competitions take place in the morning, followed by afternoon elimination rounds and an awards ceremony. Tours of SLAC are also on the agenda.

As with any event of this size, we can't do it without your help! We still need volunteers to serve as moderators, timekeepers, scorekeepers and runners—for more information or to become a volunteer please contact Melinda Lee (xt 8547) for details.

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