Friday, April 20, 2012

Have a safe day!

Friday, April 20
1 p.m.
LHC Physics Center Topic of the Week Seminar - WH11
Speaker: Can Kilic, University of Texas
Title: Two Topics that Connect Dark Matter and the LHC: Flavored Dark Matter and the COnsequences of Grand Unification
3:30 p.m.
4 p.m.
Joint Experiment-Theoretical Physics Seminar - One West
Speaker: Yannis Semertzidis, Brookhaven National Laboratory
Title: A Sensitive Storage Ring Electric Dipole Moment Experiment for the Proton

Saturday, April 21
8 p.m.
Fermilab Art Series - Ramsey Auditorium
Manya: A Living History of Marie Curie
Tickets: $16/$8

Sunday, April 22
1 p.m.
Family Open House - WH15

Monday, April 23
2:30 p.m.
Particle Astrophysics Seminar - Curia II
Speaker: Kathryn Zurek, University of Michigan
Title: Asymmetric Dark Matter
3:30 p.m.
4 p.m.
All Experimenters' Meeting - Curia II
Special Topics: Successful Completion of Six-Cavity Test with the HINS Accelerator; g-2 Equipment Disassembly at BNL; FTBF Experiment Beams and Their Use; T-1005: g-2 Calorimeter R&D at FTBF

Click here for NALCAL,
a weekly calendar with links to additional information.

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Wilson Hall Cafe

Friday, April 20

- Breakfast: Chorizo burrito
- Old-fashioned ham & bean soup
- Philly-style chicken
- Chicken pot pie
- Smart cuisine: Baked fish over rice
- Roasted veggie & provolone panini
- Assorted sliced pizza
- Carved baked ham
Wilson Hall Cafe Menu

Chez Leon

Friday, April 20

Wednesday, April 25
- Grilled pork kabobs w/ manchamantel sauce
- Spanish rice
- Margarita cake

Chez Leon Menu
Call x3524 to make your reservation.


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Special Announcement

Family Open House - April 22

This year's Family Open House at Fermilab will take place from 1 to 5 p.m. on Sunday, April 22. More than 2,000 people are expected to attend.

The Open House offers family-style hands-on activities, science shows and Q&A sessions with scientists. The event is free of charge. Click here for more information.


Successful cryomodule test at Fermilab lays groundwork

The successful testing of this cryomodule at Fermilab will pave the way for future projects. Photo: Reidar Hahn

Scientists and engineers recently completed testing Fermilab's first SRF cryomodule, CM1, in what they are calling a successful experiment. The R&D knowledge gained from this testing will pave the way for more advance cryomodules for linear accelerators, such as the proposed Project X and ILC.

"We wanted to prove that we can operate and support SRF technology at Fermilab," said Elvin Harms, who is responsible for coordinating CM1 operations. "This experiment was a huge success and a great learning experience. A large number of people at Fermilab can take pride in contributing to this achievement."

Superconducting radio-frequency cavities accelerate particles by sustaining an electric field that oscillates between positive and negative pulses to push and pull charged particles from one cavity to the next. SRF cavities can generate accelerating voltages orders of magnitude higher than their room-temperature counterparts. CM1 consists of eight SRF cavities that were originally assembled and tested at the Deutsches Elektronen-Synchrotron (DESY) laboratory in Germany. These eight cavities and additional components were shipped to Fermilab for configuring and testing.

"CM1 arrived as a kit," Harms said. "It was our prototype to learn about building SRF components into a complete assembly and then operating it."

With assistance from counterparts at DESY and the INFN/LASA laboratory in Italy, technicians pieced together CM1 and shipped the completed cryomodule to Fermilab's NML. Here, engineers ran electricity through the cryomodule and measured the accelerating field and electrical efficiency both at room temperature and cooled to 2 Kelvin, which is -460 degrees Fahrenheit.

"The warm testing trains the components and clears any impurities, especially on the input couplers," Harms said. "The cold testing is what allows scientists to analyze the performance of each piece as well as the cryomodule as a whole. This type of experimentation allowed us to train ourselves on the technology and master it. Of course it's a continuous learning experience."

Read more

—Sarah Charley

In the News

Neutrino no-show deepens cosmic ray mystery

From New Scientist, April 18, 2012

The failure of ghostly subatomic messengers called neutrinos to show up at an Antarctic telescope has knocked down a major astrophysical theory involving some of the most dramatic explosions in the universe.

"I would have preferred to have seen neutrinos," says the IceCube telescope's principal investigator Francis Halzen at the University of Wisconsin, Madison. "Null results are usually not very interesting, but in this case, it is."

Neutrinos are emitted by a range of cosmic processes. Most stream through matter without being deflected or changed, making them ideal long-distance messengers from distant galaxies.

Read more

In the News

Fast forward: The dark energy camera

From, May 2012

Get a sneak peak at the new project that will search for mysterious cosmic energies that drive our universe

Ever since the Big Bang nearly 14 billion years ago, the universe has been expanding. Astronomers once believed this growth spurt would gradually slow down, but in 1998 they discovered that distant galaxies were actually moving away from one another faster than ever. Instead of hitting the brakes, the universe is flooring the gas pedal.

A new project representing 23 scientific institutions is investigating this mysterious cosmic propellant, called dark energy. The centerpiece is the Dark Energy Camera, which will be operational in July after it is installed in the telescope at the Cerro Tololo Inter-American Observatory in Chile.

Read more

Physics in a Nutshell

Subatomic bomb squad

Particle physics collisions occur quickly and, like bomb investigators, scientists figure out what happened by looking at how the debris interacted with nearby material.

To identify a particle, sometimes we need work backwards. If we look at a Higgs boson decaying into two electrons and two muons, we can't hold onto one of those particles and put it under a microscope. Instead, we look at how they interact with the detector and use that to put together the pieces of the puzzle.

Imagine that you're a bomb squad investigator, and a house blew up (thankfully, without injuring anyone). You weren't there when the explosion occurred, so, as the investigator, you need to know a lot about the material surrounding the explosion and how fast-moving matter interacts with that material. If the stove blew up, the debris would have punched through walls or dented the refrigerator. By examining the resulting damage, you can figure out what happened, even if the stove is totally destroyed.

In physics, we do essentially the same thing. If you can identify these characteristics and know that charged particles move in a curved path in a magnetic field, you can see how scientists look at the final pieces to reconstruct a particle collision.

Click here to read the expanded column on piecing together collisions.

Want a phrase defined? Have a question? Email Fermilab Today.

Don Lincoln

Special Announcement

Live chat with Energy Secretary Steven Chu - today

Steven Chu

Secretary of Energy Steven Chu will host a live chat on the benefits of transitioning to a clean energy economy at 9:45 a.m. Click here to join in the conversation.


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