Friday, Aug. 2, 2013

Have a safe day!

Friday, Aug. 2

10:30 a.m.
Research Techniques Seminar (NOTE LOCATION) - One West
Speaker: Takaki Hatsui, RIKEN Spring-8 Center
Title: SOI Pixel Sensor Process: Lessons Learned from the Development of SOPHIAS, a Sensor for X-Ray Free-Electron Laser Experiments

3:30 p.m.


Monday, Aug. 5


3:30 p.m.

4 p.m.
All Experimenters' Meeting - Curia II

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a weekly calendar with links to additional information.

Ongoing and upcoming conferences at Fermilab


Take Five

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Secon Level 3

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Flags at full staff

Wilson Hall Cafe

Friday, Aug. 2

- Breakfast: chorizo and egg burrito
- Breakfast: blueberry-stuffed French toast
- Teriyaki chicken breast
- Smart cuisine: white-fish florentine
- Country fried steak
- Baked ham and Swiss ciabatta
- Shrimp and crab scampi
- Clam chowder
- Texas-style chili
- Assorted pizza by the slice

Wilson Hall Cafe menu
Chez Leon

Friday, Aug. 2

Wednesday, Aug. 7
- Chicken vindaloo
- Plum tart with goat cheese and walnut-thyme streusel

Chez Leon menu
Call x3524 to make your reservation.


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In Brief

New training requirement for all Fermilab supervisors and managers

All supervisors and managers are required to complete a series of three management courses by Aug. 1, 2015: Managing within the Law, Interaction Management and Performance Review. These courses will be listed on your Individual Training Summary in TRAIN once your manager updates it. Courses you have already taken will be listed as complete.

The three courses are now required for all supervisors and managers as an update on human resources law, employee coaching and performance review. These courses are also included in the Fermilab Management Practices Seminar, a series of six courses that all new supervisors are required to complete. Course descriptions and enrollment are available online. If a class is filled, please enter your name on the waitlist so you can be notified of the next scheduled class.

In Brief

Atrium stairways to receive new lighting fixtures

Work will begin today on the installation of new, brighter LED light fixtures in the Wilson Hall atrium east and west stairways. This work will result in a brighter and safer environment for people using them. Work will begin on the east stairs and will require the closure of two floors at a time. Each floor will be closed for approximately two days. When the east side is complete, work will move to the west side. All lighting fixture work is scheduled to be completed by the end of August.

We appreciate your patience in the completion of this last installment of the stairway safety improvements project.

Photo of the Day

Pups on a stoop

Coyote pups hang out on some steps by Road A1. Photo: Donna Iraci, BSS
From symmetry

CERN artist-in-residence develops ear for physics

Sound artist Bill Fontana taps into the music of the Large Hadron Collider. Photo: Christoph Rembser

When Bill Fontana visits a cafe, he's one of many customers wearing headphones. To a casual observer, he looks like someone in his own private world, cut off from the life around him.

In fact, it's the opposite: Tiny, sensitive microphones are amplifying the sounds of the cafe—the clatter of dishes in the kitchen, the laughter of the people at the table next to him, the espresso machine hissing and bubbling—and pumping them into his ears.

Fontana devotes his life to capturing and treasuring the music of the moment.

It was in this spirit that he applied for the Prix Ars Electronica Collide@CERN award, for which a digital artist receives a monetary prize and a three-month residency made possible through a collaboration between CERN and international cyberarts organization Ars Electronica with funding from external private donors.

Fontana, 66, grew up in Cleveland, Ohio, in walking distance from the Cleveland Orchestra. He composed music in the 1960s and began creating his first pieces of audio art in 1976. For the past three decades, his artistic palette has been the latent sounds of the world.

Read more

Kelly Izlar

In the News

Focus: Testing relativity using Earth's motion

From Physics, July 29, 2013

Many theories that go beyond the standard model of particle physics, such as string theories, predict violations of relativity. Now a team has searched for two types of such violations at an unprecedented precision using a new technique involving the element dysprosium, as they report in Physical Review Letters. The team looked for long-term variations in the energy of a specific atomic transition and found no violations. But they say refinements of their experiment may eventually lead to measurements 1000 times more precise than current experiments—opening up a new avenue to probe for signs of physics beyond the standard model.

Read more

Physics in a Nutshell

Fixed-target vs. collider

Particle collisions can be achieved in two different modes: fixed-target and collider. As depicted here, shooting a beam into a non-moving target is much easier than shooting two moving beams at each other, as is done in the collider mode. The precision of LHC collider-type collisions is equivalent to that of shooting one sewing needle from Fermilab and another from Winfield (six miles away) and having them collide in the middle. The very large improvement in collision energy is the reason we choose this difficult option.

Scientists have known how to accelerate charged particles for over a century. Take a battery, two pieces of metal and some wire, and voila, you have a simple accelerator.

However, once you've learned to accelerate subatomic particles, the next question is, "Well, now what?" Over the decades, we've learned that we can shoot beams of particles at targets and learn something about the universe by observing how the beams and the targets interact. There are two common ways to do these studies: fixed-target and collider.

In a fixed-target setup, the situation is simple. The particle beam is aimed at a large and stationary target. Such a stationary target might be a chunk of metal or some liquid hydrogen contained in a flask. The beam is much narrower than the target, and the target can be of any thickness. This setup is relatively easy. For one, it's easy to hit the target; my rural origins remind me of the phrase "as broad as a barn." For another, you can get as many collisions as you want by making the target thicker. Eventually, you can make the target so thick that the entire beam interacts with it. That choice would have some adverse consequences, but you could do it if you wanted to.

In the collider setup, the situation is technically much more challenging. Two beams are aimed at one another and made to collide. It's like using two guns to shoot bullets at one another with the hope that the bullets will hit head-on. Because the beams can be quite narrow, guaranteeing a collision requires incredibly accurate steering. To give a sense of scale, at the LHC the degree of precision required is equivalent to that of shooting toward each other two sewing needles separated by about six miles and having them collide at the halfway point. It is a very hard thing to do.

Given the relative straightforwardness of fixed-target operations and the difficulty of the collider version, why would anyone run an accelerator in collider mode? It's because of the useful energy available in a collision—it has much higher energy than what results from a fixed-target interaction. To get a sense of why, think of an automobile collision. Nobody wants to get into an accident, but if you had to, it would be better to drive your car into a parked car than to hit a moving car head-on. The collision with a parked car is less likely to result in injury. In contrast, a head-on collision with a moving vehicle can demolish both cars.

To put some numbers to the difference between the two modes: Suppose you ran an LHC beam into a stationary target and compared the impact to that of a real LHC collision, in which the two beams hit head-on. In one case you have two beams, while in the other you have only one, so you might think the "collider" collision is twice as violent as the "fixed-target" version. However, the "collider" collision is actually nearly 90 times more powerful. It is for this reason that researchers studying at the Energy Frontier will continue to make the particle collider their tool of choice.

Don Lincoln

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Today's New Announcements

All 2013 summer interns photo - Aug. 7

Batavia Road entrance closed today

Asphalt work on Batavia Rd. from Eola to east gate today

C2ST presents The Physics of Baseball - today

Fermilab Heartland Blood Drive - Aug. 12 and 13

UChicago Tuition Remission program deadline - Aug. 22

URA Visiting Scholars program deadline - Aug. 26

Same-sex couples now eligible for immigration benefits

Outdoor soccer at the Village

International folk dancing in Auditorium Thursdays for summer

Chicago Fire discount tickets

Fermilab discount at Don's Auto Ade Inc.

Bristol Renaissance Faire discount

Find new classified ads on Fermilab Today.