 | Thursday, February 10, 2005 |
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Thursday, February 10
Friday, February 11 |
 Mostly Sunny 30º/19º
Extended Forecast |
Secon Level 3 |
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Thursday, February 9 Minnesota Wild Rice with Chicken Tuna Melt on Nine Grain $4.75 Breaded Veal with Mushroom Cream Sauce $3.75 Sweet & Sour Pork over Rice $3.75 BLT Ranch Wrap $4.75 Cheesey Breadsticks $2.25 Chicken Pecan Salad $4.75 The Wilson Hall Cafe now accepts Visa, Master Card, Discover and American Express at Cash Register #1.
Wilson Hall Cafe Menu |
| Fermilab Today is online at: http://www.fnal.gov/today/ Send comments and suggestions to today@fnal.gov Fermilab Today archive Fermilab Today PDF Version Fermilab Result of the Week archive Fermilab Safety Tip of the Week archive Linear Collider News archive Fermilab Today classifieds Subscribe/Unsubscribe to |
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Universities Help on the Tevatron This article is the fifth in a series that will focus on the benefits of Fermilab/University collaboration on different accelerator projects. | ||
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Many university accelerator projects involve solving problems or improving
performance. "Accelerator physicists work on a tight schedule," said Alvin
Tollestrup of Fermilab's Experimental Particle Physics Division. "Most
universities have little experience with the accelerator environment — the
24-hour monitoring and all the potential repercussions of the system on other
experiments."
One successful collaboration includes the building of the Tevatron Electron Lens (TEL), which started in 2000 at the beginning of Run II. The TEL, attached to the Tevatron, performs two functions. When opposing proton and antiproton bunches collide, only a few particles actually interact, but the other particles are slightly scattered. In "beam-beam compensation" the TEL shoots an electron beam that interacts with the antiprotons, which reverses this scattering and keeps the bunches compact. Additionally, the TEL "sweeps out" particles that have escaped from the bunches into the abort gap, an issue that otherwise would severely handicap the Tevatron. "The TEL is the only thing in the Tevatron that can be adjusted fast enough to target each bunch independently," said Bishofberger. "After installing it, we succeeded in our goals within a couple months. Today, the first TEL is being used continuously and a second TEL is being built. I'm so excited to be part of a project that has such an immediate effect on today's colliders. It's making a difference right away."
Other university groups contributing to Tevatron performance include Ludovic
Nicolas from the University of Glasgow, who is working with Nikolai
Mokhov on beam vacuum effects as well as radiation background simulations.
"Fermilab is like a great playground for students doing research," said
Nicolas. Also, Jia Ning from the Illinois Institute of Technology is
working with Chen-Yang Tan of the Accelerator Division on a transverse
beam frequency response simulator, which will conserve machine studies
time. Carol Johnstone and Valeri Lebedev of Fermilab's Accelerator
Division have worked with Michigan State University students on beam
lattice calculations, as well. |
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February 7 - February 9 - During this 48 hour period Operations established one store that combined with an existing store provided the experiments with approximately 26 hours and 19 minutes of luminosity. - A quench ended store 3969 - The Main Injector held off due to ground fault indication - MI-50 suffered a switch gear failure
Read the Current Accelerator Update |
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FYI: AIP Bulletin of Science Policy News, February 9, 2005 Tight Budget Times: DOE Office of Science FY06 Request The underlying theme at the release of the Department of Energy's FY 2006 budget request was the need to rein in federal spending. The total DOE budget would drop 2.0 percent under President Bush's FY 2006 budget request, from $23.9 billion in FY 2005 to $23.4 billion. For DOE's civilian research, the Office of Science (SC) would see its budget reduced by 3.8 percent from FY 2005 funding of $3,599.6 million to $3,462.7 million. The FY 2006 requested amount is, in fact, also 2.0 percent lower than the office's FY 2004 funding. According to DOE documents, much of the reduction comes from the elimination of $79.6 million in congressionally directed earmarks to Biological and Environmental Research, and the reduction to the budget for core SC programs is only 1.6 percent. read more |
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Delving for Dibosons at DZero | ||||
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The W and Z bosons are particles that carry the weak force, one of the four
fundamental forces found in nature. According to the Standard Model, the W and Z
bosons interact with each other due to their weak charge. At Fermilab, we
measure the strength of the interaction of the W boson with the Z boson
by identifying and studying collisions in which both are produced at the
same time. By counting the number of occurrences and measuring the properties
W and Z particles are very massive. The W boson weights 85 times the mass of a proton. The Z boson is even heavier. Shortly after they are produced, W and Z bosons disintegrate into lighter types of particles and we detect these "decay products" in the DZero detector. The figure shows one of the DZero candidate events with W and Z bosons produced. Fermilab's proton-antiproton collider, the Tevatron, is the only particle accelerator in the world that ever could produce both a W and a Z boson
With these three candidate we are able to estimate the rate the Tevatron produces WZ events. Also, we set constraints on the strength of the interaction between the W and Z bosons. | ||||
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Result of the Week Archive
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Fermilab Water Pressure Adjustments FESS/Operations will be adjusting the Main Site Domestic Water Pressure to expected Warrenville levels for data collection today. Please notify your Building Manager or Work Central at x3434 of any water pressure related problems.
Free Introductory Tai Chi Class
Fermilab Offers Family Open House, Sunday, Feb. 13, 2005
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