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PEP-II Prepares to Deliver Higher Luminosity
Profile: O Christmas Tree!
SLAC Rings in a
New Seminar Series
Wednesday - January 3, 2007 |
PEP-II Prepares to Deliver Higher LuminosityThe Accelerator Systems Division has completed a number of upgrades that ready PEP-II to deliver stronger currents and higher luminosity to the BaBar detector this year. In one of the projects, Mechanical Fabrication Department staff replaced five vacuum chambers near the interaction region where electrons and positrons collide in the detector. The new chambers will allow higher beam current, produce less outgassing, and undergo less movement as they warm up during operation. With the upgrades in place, the PEP team expects not only to increase luminosity significantly, but also to reduce background radiation in the detector and make the machine more stable and efficient to operate. Congratulations to all involved on a job well done. See more images here. |
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O Christmas Tree
About 20 years ago, Hewett, a graduate student at the time, bought a totem-pole keychain while visiting a collaborator in Vancouver. Shortly after, a sort of eureka moment struck: "I thought, hey, I could use this as a Christmas ornament," she says. Since then, Hewett has made a habit of collecting tree trinkets whenever she travels to conferences, workshops, committee meetings, and the like. "I look for something that says to me, ahh, this is that place," she says. Indeed, Hewett can tell you with enviable recall the placeas well as the year and eventeach ornament represents. The hand-painted egg? Budapest, 1991, Beyond the Standard Model workshop. The cactus? Tucson, 2003, supersymmetry conference. The glass Santa in a gondola? Trieste, 2006, presentation of LHC lectures. Read more... |
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