Fermilab TodayFriday, March 18, 2005  
Friday, March 18
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
4:00 p.m. Joint Experimental Theoretical Physics Seminar - 1 West
Speaker: D. Zieminska, Indiana University
Title: Lifetime Difference and A Limit on Mixing in the Bs System from DZero

Sunday, March 20
2:30 p.m. Gallery Chamber Series - 2nd Flr X-Over
Rembrandt Chamber Players
Tickets: $15

Monday, March 21
2:30 p.m. Particle Astrophysics Seminar - Curia II
Speaker: T. Wiseman, Harvard University
Title: Black Holes and Extra Dimensions
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
4:00 p.m. All Experimenters' Meeting - Curia II
Special Topics: CDF Silicon Detector Damage Update and DZero Luminosity Measurement

Weather Mostly Cloudy 43º/35º

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Secon Level 3

Friday, March 18
Cream of Wild Mushroom Soup
Blackened Fish Filet Sandwich Mediterranean $4.75
Style Baked Fish $3.75
Casserole Florentine with Italian Sausage $3.75
Eggplant Parmesan Panini $4.75
Pizza Supreme $2.75
Baked Potato Bar w/ Chili $4.75

The Wilson Hall Cafe now accepts Visa, Master Card, Discover and American Express at Cash Register #1.

Wilson Hall Cafe Menu
Chez Leon is now open. Call x4512 to make your reservation.

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Dark Matter Search Marks Return of Bubble Chamber
Bubble Chamber
The bubble chamber sits inside the pressure chamber, which will be lowered into the MINOS gallery sometime next week. (Click on image for larger version.)
A team of Fermilab and University of Chicago scientists have resurrected an old particle detection technique and created a bubble chamber to find elusive dark matter. "If this goes as planned, we could have one of the best dark matter detectors in the world," said Juan Collar, principal investigator at the University of Chicago for the project, called the Chicagoland Observatory for Underground Particle Physics.

The bubble chamber, roughly the size of a soccer ball and filled with a common halide CF3I, will attempt to find dark matter by nuclear recoil events caused by WIMPs, weakly interacting massive particles that are less massive and less reactive than neutrinos. The WIMPs physically slam against the superheated CF3I nuclei and move it, starting a domino effect in the compressed liquid that quickly grows to visible size. The detector, which "has an exquisite level of sensitivity," according to Collar, is scheduled to be lowered into the MINOS gallery sometime next week, with usable data after a few weeks and an overall run time of a few months.

Trial runs at the University of Chicago have been quite successful. "It has surprised us at every turn," said PPD Mechanical Department head Mike Crisler. "It has worked like gangbusters from the start." The current model is a prototype for a bigger one that will be placed in an even deeper chamber. Roger Hildebrand, who made the first bubble chambers in the 1940's and is now in his 90's, has helped with the guidance and inspiration for this recent reincarnation.
- Eric Bland

Accelerator Update
The Luck of the Irish
St. Patty's Day
Crae Peich (left) of the Accounting Department and Sharon Larson of Procurement know how to celebrate St. Patrick's Day in style. (Click on image for larger version.)
In the News
FYI: AIP Bulletin of Science Policy News, March 17, 2005
Key Hearings on DOE Science Request Focus on FY 2006 Budget Tradeoffs
Last Wednesday was both a busy and important day on Capitol Hill for Ray Orbach, Director of the Department of Energy's Office of Science. At 10:00 a.m., Orbach testified at a hearing of the House Appropriations Subcommittee on Energy and Water. Later that day he appeared on the other side of Capitol Hill at the Senate's counterpart subcommittee.
read more

University of Chicago, Press Office, March 17, 2005
Robert Rosner named Director of Argonne National Laboratory
The University of Chicago has appointed Robert Rosner to the directorship of Argonne National Laboratory effective April 18. His appointment was approved by Secretary of Energy Samuel W. Bodman.
read more

'Wonders' Amaze Local Kids
Wonders of Science
Kids and parents watch and enjoy "The Wonders of Science" show (Click on image for larger version.)
The 18th annual "Wonders of Science" event drew a sellout crowd to Ramsey Auditorium last Sunday, March 13th. The show, aimed at kids 7-12, featured physics and chemistry demonstrations from the "Weird Science" team of teachers. When audience volunteers were requested, hundreds of small hands shot into the air.

Fermilab's Education department, which organized the event, hoped to entertain and teach kids about science. "We wanted to show that science can be fun, that it is a class to look forward to, and something they can do later in life," said Education's Spencer Pasero. "Science is not something done by a stodgy guy in a lab coat holed up in his lab since 1962."

A beach ball suspended in midair by leaf blowers demonstrated Bernoulli's Principle of pressure differences. A fire extinguisher-powered car, like the one seen on "The Late Show" with David Letterman last month, illustrated Newton's third law of motion that for every action there is an equal and opposite reaction. Even the Linac was represented by a ball bearing accelerator. Mary Jo Murphy, a docent for the Education office, helped design the show.

Each child left the show with a take-home kit filled with ideas for home science experiments with simple household items. "It's great to see the kids get their kit and instantly start looking through it," said Pasero. "They can't wait to get home and try it."
- Eric Bland

New Classifieds Posted on Fermilab Today
New classified ads have been posted on Fermilab Today. A permanent link to the classifieds is located in the bottom left corner of Fermilab Today.

Building Better Bones
Back by popular demand, Building Better Bones will be offered on March 23 at noon Curia-II. A brief lecture on Osteoporosis will be followed by a free bone scan for any woman attending the lecture. Jody Springsteen, BSN, CRRN cover osteoporosis risk factors, diagnosis and prevention.

Fermilab Folk Club Barn Dance
The next Fermilab Folk Club Barn Dance will be on Sunday, March 20 at 2 p.m. with fiddling by Jordan Wankoff and calling by Paul Tyler.
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