Friday, May 18, 2012

Have a safe day!

Friday, May 18
3:30 p.m.
4 p.m.
Joint Experiment-Theoretical Physics Seminar - One West
Speaker: Markus Wobisch, Louisiana Tech University
Title: Determinations of the Strong Coupling in Jet Production at DZero
8 p.m.
Fermilab Lecture Series - Ramsey Auditorium
Speaker: Mark Hersam, Northwestern University
Title: The Age of Carbon: Buckyballs, Nanotubes, Graphene, and Beyond

Monday, May 21
2:30 p.m.
Particle Astrophysics Seminar - One West
Speaker: Pearl Sandick, University of Utah
Title: Dark Matter and EWSB Naturalness in Unified SUSY Models
3:30 p.m.

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

Upcoming conferences


Take Five

Weather Sunny

Extended Forecast
Weather at Fermilab

Current Security Status

Secon Level 3

Current Flag Status

Flags at full-mast

Wilson Hall Cafe

Friday, May 18

- 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, May 18

Wednesday, May 23
Guest chef: Veronica Almeraz
- Bistec a la mexicana
- Arroz con frijoles
- Limon mousse

Chez Leon Menu
Call x3524 to make your reservation.


Fermilab Today

Director's Corner

Result of the Week

Safety Tip of the Week

CMS Result of the Month

User University Profiles

Related Content


Fermilab Today
is online at:

Send comments and suggestions to:

Visit the Fermilab
home page

Unsubscribe from Fermilab Today


Newly completed cryomodule transported to NML

Fermilab's homegrown cryomodule CM2 was transported to NML last month. It replaces Cryomodule 1, which was assembled from a kit from DESY. Photo: Elvin Harms

In 2007, personnel from the German laboratory DESY and the Italian institute LASA came to Fermilab to assist technicians, engineers and scientists in the assembly and operation of Cryomodule 1, a superconducting radio-frequency cryomodule.

Now Fermilab is losing the training wheels: it is installing a real homegrown SRF cryomodule. RFCA002, nicknamed CM2, is replacing CM1.

Cryomodule 1 was used as a training ground for Fermilab to prove that the SRF infrastructure worked and to give its personnel hands-on experience assembling and operating multi-cavity cryomodules.

"The difference between CM1 and CM2 is that CM1 was a kit that DESY delivered to us for assembly at Fermilab," Elvin Harms said. "CM2 is more advanced and will be used not only for SRF R&D but eventually for physics as well."

SRF technology is the basis of future particle accelerators such as the proposed International Linear Collider and Project X. 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 cell to the next.

CM2 is a next-generation SRF cryomodule. It uses high-performance components specifically designed with the ILC and Project X in mind. Compared to conventional radio-frequency systems, SRF technology provides orders-of-magnitude increase in performance.

"The hope for CM2 is that it will be the first cryomodule to reach the average ILC specification gradient at Fermilab," said lead engineer Tug Arkan. "That's the goal to demonstrate. We haven't yet proved it at Fermilab."

Fermilab purchased the eight cavities in CM2 from industries in Europe and the United States and vertically tested them at Jefferson Lab and Fermilab. The brand-new cavities underwent an initial test in which they were submerged in liquid helium and charged with continuous RF waves. They were then placed in helium jackets, outfitted with input couplers and tested again with high-power pulsed RF waves at Fermilab's Horizontal Test Stand. Finally, they were installed in CM2. Fermilab directed the entire process.

Read more

—Sarah Charley

In the News

Fermi: Tritium levels in water not an issue

From The Beacon News, May 16, 2012

Tritium levels in the water at Fermilab remain within environmental standards, Fermi officials say.

Tritium is a radioactive bi-product of hydrogen. It has been produced at the site for 35 years. In 2005, tritium was detected in the surface waters for the first time. The levels were below regulatory limits. In 2012, it is still detectable, but remains at low levels, according to Eric Mieland, with Fermilab's Environment, Safety and Health section.

"We're constantly looking to minimize the amount of radiation that's produced," Mieland said.

Read more

In the News

MAJORANA, the search for the most elusive neutrino of all

From Berkeley Lab News Center,
May 16, 2012

Berkeley Lab researchers play a vital role in a deep underground experiment that could rewrite the Standard Model

In a cavern almost a mile underground in the Black Hills, an experiment called the MAJORANA DEMONSTRATOR, 40 kilograms of pure germanium crystals enclosed in deep-freeze cryostat modules, will soon set out to answer one of the most persistent and momentous questions in physics: are neutrinos their own antiparticles? If the answer is yes, it will require rewriting the Standard Model of Particles and Interactions, our basic understanding of the physical world.

"The best way to learn whether neutrinos are their own antiparticles would be to observe a certain kind of radioactive decay, called neutrinoless double-beta decay. It has never been detected conclusively, and if it occurs at all, it's exceedingly rare," says Alan Poon of the Nuclear Science Division at the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab).

Poon is the current executive-committee chair of the MAJORANA Collaboration, which is comprised of more than 100 researchers from 19 institutions in the United States, Canada, Russia, and Japan, and whose efforts are focused on the experiment now under construction at the Davis Campus of the Sanford Underground Research Facility (SURF) in Lead, South Dakota.

Read more

Physics in a Nutshell

It's a colorful world...

The word color invokes a clear meaning to most people, but in a particle physics context, it can be misleading. For particle physicists, the term color is synonymous to the kind of charge that causes the strong nuclear force.

If you hang around particle physicists for a while, especially ones working at accelerators that utilize proton beams like the Tevatron or LHC, you'll hear them talking about color. The first time you hear this, you might envision little blue, green, red, yellow and orange subatomic particles flying around, as in an excellent billiard break.

But color has a very different meaning in particle physics. For particle physicists, the term color denotes the charge that causes the strong nuclear force. This is analogous to the more familiar charges that cause the electric force, called positive and negative. When you add together a positive and a negative charge, you get zero charge, or something electrically neutral.

For the strong force, there are not two but three charges. Scientists coined the term color because they needed three of something that could be added together to get zero. Since red, green, blue can be added to make white, or something chromatically neutral, "color" fit the bill. They even called the three strong nuclear charges red, blue and green.

In 1964, the idea of quarks was proposed to explain the myriad particles that had been discovered in the 1940s and 1950s. Quarks are members of a class of particles called fermions. You could combine three quarks to make a proton, a neutron and many other particles.

One possibility was a particle containing three up quarks. Such a particle had been observed, called the Δ++ (delta double-plus). The problem is that a cardinal rule of fermions forbids two of the same quarks existing in the same place at the same time in exactly the same configuration, and in order to account for the observed properties of the Δ++, quark theory said that it had to contain two identical up quarks. This problem could have led to the quark model being discarded, but the model otherwise worked rather well. To save the quark model, Oscar Greenberg proposed that each of the three quarks had a different color, and this meant that the three quarks weren't identical after all.

Click here to read the expanded column on the meaning of color.

Don Lincoln

This is a nice demonstration of how you get white if you combine red, blue and green. You can try this yourself at home, or watch it demonstrated in a video online.

Latest Announcements

Motorcycle safety seminar - May 22

Muscle toning class - begins May 22

Interpersonal communication skills

Pool memberships available

Fermilab Management Practices seminar schedule

Artist Reception - today

Fermilab Lecture Series presents "The Age of Carbon: Buckyballs, Nanotubes, Graphene & Beyond" - today

Site-wide domestic hydrant flushing - May 19-20

NALWO luncheon and tour - May 24

Fermilab Family Outdoor Fair - June 10

Swim lessons for adults, youth & preschoolers - register by June 11

New Perspectives is coming - June 14

University of Chicago Tuition Remission Program deadline - June 15

DreamWeaver CS5: Intro class - June 19-20

DASTOW - June 20

Intermediate/advanced Python programming class - June 20-22

Join Walk 10,000 Steps-A-Day

Scottish country dancing meets Tuesday evenings in Kuhn Village Barn

2012 standard mileage reimbursement rate

Six Flags Great America discounts

Employee offer at Pockets offers Mother's Day discount

Dragon II restaurant employee discount

Changarro restaurant offers 15 percent discount to employees

Atrium construction updates

Security, Privacy, Legal  |  Use of Cookies