 | Wednesday, November 30, 2005 |
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Wednesday, November 30 11:00 a.m. Fermilab ILC R&D Meeting - Curia II (note location) Speaker: V. Kuchler, Fermilab Title: ILC Conventional Facilities Upgrade 2:30 p.m. Special Seminar - Curia II Speaker: W. Guryn, Brookhaven National Laboratory Title: Results from the PP2PP Experiment at RHIC and Future Plans 3:30 p.m. Director's Coffee Break - 2nd Flr X-Over 4:00 p.m. Fermilab Colloquium - 1 West Speaker: G. Bernstein, University of Pennsylvania Title: Seeing the Invisible Universe with Gravitational Lensing and SNAP Thursday, December 1 11:00 a.m. Academic Lecture Series - Curia II Speaker: P. Langacker, Fermilab/University of Pennsylvania Title: Tests of the Electroweak Theory – Lecture 2 2:30 p.m. Theoretical Physics Seminar - Curia II Speaker: A. Freitas, Zurich University Title: Exploring the Nature of Matter at Future Colliders 3:30 p.m.Director's Coffee Break - 2nd Flr X-Over 4:00 p.m. Accelerator Physics and Technology Seminar - 1 West Speaker: G. Coutrakon, Loma Linda University Medical Center Title: Proton Therapy |
 Flurries Possible 35º/27º
Extended Forecast |
Secon Level 3 |
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Wednesday, November 30 - Portabello Harvest Grain - Santa Fe Chicken Quesadilla - Garlic Herb Roasted Pork - Beef Stroganoff - Triple Decker Club - Meatlover's Pizza - Pesto Shrimp Linguini with Leeks and Tomatoes The Wilson Hall Cafe accepts Visa, Master Card, Discover and American Express at Cash Register #1. |
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Wednesday, November 30
Thursday, December 1
Chez Leon Menu |
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| Crash Course in Luminosity, Key to Discovery at Fermilab | ||
| This is the seventh story in a series that explains what luminosity is, and why we've recently gotten better at producing it at the Tevatron. | ||
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Updating the "prescription" of Tevatron beam position monitors The glasses of the Tevatron were dirty, broken and scratched with a prescription more than 20 years out-of-date. Last spring, a group of much-needed optometrists came in the form of engineers, computer professionals and technicians within the Accelerator and Computing Divisions who upgraded the electronics and software for the 240 beam position monitors (BPMs) placed within the Tevatron ring. The result is a view of the Tevatron's inner workings clearer than ever before. As stores of tightly packed protons and antiprotons travel through the beam pipe, BPMs measure their locations. The secret to higher luminosity is guiding the particles on well-controlled helices (See Fermilab Today, November 23, 2005) in an aperture less than 3 inches in diameter. The recent BPM improvements will help scientists do that. The original BPM system was installed when the Tevatron was constructed in the early 1980s. "There was nothing intrinsically wrong with the system that was there," said Steve Wolbers, BPM project manager for the Computing Division. "The issue, though, is that 20-year-old electronics are probably not ideal in any situation." The electronics were replaced with modern signal-processing equipment, abandoned Main Ring BPM cables were reused for Tevatron antiproton signals and computer equipment was updated. The result is a more reliable and accurate system. "The glasses don't fall off your face every three hours, and you say, 'Oh, wow, this prescription works a lot better than the one I got 20 years ago,'" said Bob Webber, Head of the Instrumentation Department in the Accelerator Division.
The upgrades have resulted in a number of benefits to Tevatron operation. Before the new system was in place, beam position information was collected by running proton-only stores that provided no luminosity for the experiments. The new BPM system can provide accurate beam position information during normal collider operation, thus maximizing time for the experiments to collect data. The new system also is capable of measuring the positions of antiprotons, something not achievable in the past.
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From KEK Topics, November 29, 2005: Belle has integrated 500 inverse femtobarns At 3:55 pm on November 22, Belle accumulated 500 inverse femtobarns (fb-1) of electron-positron collision data. This is a landmark in integrated luminosity for the KEKB accelerator and the Belle experiment, which started operation in 1999. Integrated luminosity is a measure of the number of particle collisions. The record is equivalent to achieving 5 times 10 to the 41st crossings of electrons and positrons per square centimeter. More than 500 million pairs of B- and anti B-mesons were generated in the collisions.
The original goal of KEKB was to achieve 100 inverse femtobarns in 3 years. 500 inverse femtobarns in 6 and a half years far surpasses the original goal. The KEKB group now plans to achieve yet higher goals with various types of upgrades to the machine.
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Hargis, O'Dette Bring
Christmas Music to Stage
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'Tis Christmas Now, an assortment of holiday music from the 16th and 17th centuries played by soprano Ellen Hargis and lutenist Paul O'Dette, is coming to Fermilab at 8 p.m. on Saturday, December 10 in Ramsey Auditorium.
Hargis specializes in 17th- and 18th-century music, including ballads, opera and oratorio. She appears regularly with The King's Noyse and in recital with O'Dette. She also has performed with The Saint Paul Chamber Orchestra, the Portland Baroque Orchestra, the Seattle Baroque Orchestra and the Freiburg Baroque Orchestra.
O'Dette is the artistic director of the Boston Early Music Festival, and has more than 100 recordings of virtuoso music for the lute. He has served as conductor for Tafelmusik and is chair of the Early Music Department at the Eastman School of Music. Admission is $18 and $9 for those ages 18 and under. For more information, call 630-840-2787 or visit the Website.
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Einstein Conference at Francis Parker School this Weekend Celebrating Einstein and Science: Past, Present and Future, with Keynote address by Leon Lederman on Friday, December 2 at 6:30 p.m. and talks by Fermilab physicists on Saturday, December 3 starting at 11:00 a.m. This event is free and open to the public.
Book Fair Today Inclement Weather Snow Removal
Unix Users Meeting
Late Show with Lederman
Give the Gift of Good Health
Entertainment Books are On Sale
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