 | Thursday, June 15, 2006 |
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Thursday, June 15 1:30 p.m. Experimental Astrophysics Seminar - Dark Side (WH-6W) (NOTE DATE, TIME, LOCATION) Speaker: C. Stubbs, Harvard University Title: Calibration of LSST and Pan-STARRS with a Tunable Laser and a Calibrated Photodiode 2:30 p.m. Theoretical Physics Seminar - Curia II Speaker: C. Aubin, Columbia University Title: Muon g - 2: Reclaiming the Theoretical Calculation of the Leading QCD Contribution 3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over 4:00 p.m. Accelerator Physics and Technology Seminar - Curia II Speaker: V. Lebedev, Fermilab Title: Coherent Instabilities at the FNAL Booster
Friday, June 16 Click here for a full calendar with links to additional information. |
 Partly Cloudy 83º/65º
Extended Forecast |
Secon Level 3 |
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Thursday, June 15 -Southwestern Chicken Tortilla -Philly Style Cheese Steak -Chicken Pot Pie -Tomato Basil Chicken Parmesan -Southwestern Turkey Wrap -4 Cheese Pizza -Marinated Grilled Chicken Caesar Salads |
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Thursday, June 15
Chez Leon Menu |
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As the international particle physics community develops a plan for the International Linear Collider, one question is at the forefront of everyone's mind: where will it be built? Bob Kephart, Fermilab's ILC Program director, presented his views at last Wednesday's lecture on the efforts and preparations necessary for the ILC to be built in Illinois.
The ILC will be a huge financial investment for all partners, but especially for the host nation. Kephart feels that promoting a local site will require demonstrating the economic advantages to building the ILC in Illinois. "Building the US portion of the ILC could do a lot to bolster American technical industries," said Kephart, "and we need to make that case." Once the US determines its role, producing the many advanced components for the ILC would yield economic benefits for American industry as well as scientific returns on investment. About 30 kilometers long with an expected upgrade to 50 kilometers, the ILC would stretch beyond the boundaries of Fermilab's 6800-acre site, if the US is chosen as host. In November 2005, the Fermilab Community Task Force began discussing the impacts of a possible ILC on the surrounding communities. Kephart also described a possible scope for the project on the lab site. "If we are going to build the ILC in Northern Illinois, it would make sense to center the device on the Fermilab campus and centralize helium storage, compressors and other infrastructure," said Kephart. One proposal calls for Fermilab's large campus to house the ILC's detectors, damping rings and storage facilities, requiring a reorganization of the initial design scheme in the international Reference Design Report.
Kephart concluded by outlining what he saw as the next steps: working extensively with international partners, performing large-scale technology demonstrations to illustrate US and international capabilities, and developing R&D and construction plans with realistic milestones and cost estimates. "The timeline for this is much shorter than most people seem to think," said Kephart, "We need to have the funding in place for these preparations in roughly the next year and a half." Kephart reiterated that no matter where the ILC is built, all partners must recognize that it is a long-term commitment.
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Archaeology 2.0
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A century ago, Guiliano Pelfer's quest to explain the rise of the first European cities might have seen him leading an excavation in the Italian countryside. Today, his search is likely to lead him to a much less glamorous location-the server room down the hall.
Goodbye, Indiana Jones. Hello, IBM.
In addition to digging up artifacts and poring over ancient texts, today's archaeologists may draw on knowledge from dozens of scientific fields to create complex computer models of ancient societies. Pelfer and colleagues at the University of Florence and Italy's National Institute of Nuclear Physics in Catania are developing a grid application for the EGEE infrastructure called the ArchaeoGRID, which will bring all that knowledge together and link it with advanced computing resources.
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New York Times, June 14, 2006: Graphic: Trolling for Cosmic Particles An international group of scientists is building a new kind of telescope at the bottom of the Mediterranean Sea near the east coast of France. To be completed in 2007, it will detect light generated by neutrinos, the high-energy cosmic particles that pass directly through the Earth. See graphic |
| Avoiding a breakup | ||
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There is evidence for a new type of particle reaction at CDF. Most reactions at the Tevatron occur when a colliding proton and antiproton break apart into quarks in order to produce new particles. In this reaction the proton and antiproton actually remain intact, glancing off each other in a process which creates two high energy photons and nothing else. Only three events have been detected, but the background is predicted to be at most 0.2 events. These events are easy to identify because only two particles are created, compared to the huge number of particles in a typical reaction.
In the process of validating their measurement, CDF physicsists were able to observe another never-before-seen physics process at a hadron collider. Sixteen events were found which are consistent with the very accurate prediction that photons traveling with the proton and antiproton will interact to produce only an electron-positron pair without breaking up the proton and antiproton. Since the backgrounds to this process are similar to the two-photon reaction, this finding provides added confidence in the two-photon analysis. The search for this unusual two-photon process began in 2001, when CDF physicists explored the possibility that the Higgs boson could be produced by a similar process. Theoretically the Higgs field fills the vacuum, and it should be possible to "excite the vacuum" into a real Higgs particle in a glancing collision of a proton and antiproton. Theorists had tried to estimate the probability of this happening, but there was a very wide range in their predictions. The two-photon process measured at CDF is produced the same way as the Higgs and becomes a standard candle to predict the probability of its production. A theory group from Durham University calculates that there should be only about one such clean two-photon event in a trillion Tevatron collisions. The three events found by CDF agree with this prediction. This means that the similar process by which the elusive Higgs boson can be produced must also happen, and could be measured at the LHC, providing measurements of the Higgs boson's mass, spin and other properties. | ||
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| Result of the Week Archive
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June 13 -14 - Two stores provided 20 hours and 35 minutes of luminosity - TeV separator's wrong polarity distorts store luminosity - D0 powers down solenoid for calibration - CDF's silicon detector off
Read the Current Accelerator Update
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Say Goodbye to Dr Foxen Today and tomorrow, from 9 a.m. to 3 p.m., there will be an open house in the medical office for people who wish to say goodbye to Dr. John Foxen.
Volunteer cleanup today
DASTOW set for June 22
Blood drive sign-up
Housing Assignments for Fall 2006 and Spring 2007 |
