Friday, Feb. 17, 2012

Have a safe day!

Friday, Feb. 17
1 p.m.
Particle Astrophysics Seminar - Curia II
Speaker: Steve Leman, Massachusetts Institute of Technology
Title: Bringing Light to a Dark Matter Search
3:30 p.m.
4 p.m.
Joint Experimental-Theoretical Physics Seminar - One West
Speaker: Raphael Granier de Cassagnac, École Polytechnique/Columbia University
Title: Latest Results from the CMS Heavy-Ion Program

Monday, Feb. 20
3:30 p.m.
4 p.m.
All Experimenters' Meeting - Curia II
Lifetime Studies of Cryogenic ICs for LAr TPC Readout; GPUs Use for Lattice and Other Calculations

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

Upcoming conferences


Take Five

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Secon Level 3

Wilson Hall Cafe

Friday, Feb. 17

- Breakfast: Chorizo burrito
- New England clam chowder
- Carolina burger
- Tuna casserole
- Smart cuisine: Dijon meatballs over noodles
- Bistro chicken & provolone panini
- Assorted sliced pizza
- Carved top round of beef*

*carb-restricted alternative

Wilson Hall Cafe Menu
Chez Leon

Friday, Feb. 17
Guest chefs:
Francesco Pupillo & Donatella Torretta
"From South to North: An Italian Cooking Trip"
- Fresh ricotta cheese w/ oven roasted vegetables & sun-dried tomatoes
- Baked pasta w/ sweet peppers
- Braised pot roast w/ rich wine sauce & polenta
- Seasonal fruit
- Torta della nonna w/ crème anglaise

Wednesday, Feb. 22
- Oven-roasted trout w/ lemon dill stuffing
- Steamed green beans
- Blueberry crisp

Chez Leon Menu
Call x3524 to make your reservation.


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AAAS meeting presents particle physics' past, present and future

The theme of this year's AAAS meeting is "Flattening the World: Building a Global Knowledge Society," illustrated by this web of information.

Tantalizing hints of the elusive Higgs boson! Neutrinos that appear to travel faster than light! New particles! The mere inkling of a particle physics discovery gets the globe buzzing, and 2012 is shaping up to be another big year for particle physics news. Scientific leaders from laboratories around the world will present the latest particle physics findings and give a look at what's next at the annual meeting of the American Association for the Advancement of Science starting tomorrow in Vancouver, Canada.

The Higgs boson is top on the list for 2012, as experiments in Europe and the United States will eliminate its last hiding spots. In the first of two particle physics sessions at the AAAS Annual Meeting, Rob Roser from Fermi National Accelerator Laboratory in the United States will present the latest findings from experiments at the Tevatron collider. The Tevatron experiments continue to comb through more than two decades of data in search of the Higgs boson and answers to other fundamental questions about matter, energy, space and time. Research Director Sergio Bertolucci from the CERN laboratory in Switzerland will present results from the first full run of the Large Hadron Collider, as well as expectations for 2012 when the collider will reach even higher energies.

Looking even farther ahead, in the same session physicist Lia Merminga from the TRIUMF laboratory in Vancouver will discuss cutting-edge technologies for the next generation of particle accelerators.

Read the full press release here.

Photo of the Day

Coyote skates at Fermilab

A curious coyote wandered onto the ice for a drink of water. After taking a look around, he safely retreated to the woods. Photo: Marty Murphy, AD
In Brief

New optional timecard feature

Filling out your timecard through the Fermilab Time & Labor (FTL) system may now be easier. The Computing Sector is announcing a way to access FTL that does not require java to be installed on your web browser. You can try it out by visiting this website.

This FTL link uses only html and will work for most users and on many browsers and operating systems, including on devices like smartphones. The html version is optional, and you can continue using the standard interface for full functionality and technical support. The html link is provided for ease of use only. If it doesn't work for you, please continue using your currently supported method for filling out your timecard.

In the News

Scientists build GPU cluster for subatomic calculations

From R&D Magazine, Feb. 14, 2012

The latest addition to computing power at U.S. Department of Energy's Fermi National Accelerator Laboratory is a 45-teraflop cluster of graphics processing units (GPU) that scientists use to explore the properties of the strong nuclear force. The GPU nodes power through data faster than any other computing nodes at more than five times the rate of the processing units of the previous generation.

The cluster is part of a national project called USQCD. Quantum chromodynamics, or QCD, is the theory that explains the properties and behavior of quarks and gluons. Scientists compute the particles' subatomic interaction, the strong nuclear force, using algorithms and techniques known as lattice QCD. The USQCD collaboration develops the software and hardware needed to meet the high demands of lattice QCD calculations, which require tens of thousands of processors.

While industry would like to see increasingly powerful processors applied to cell phones, laptops and other consumer electronics, the USQCD collaboration aims to determine how important GPUs will be to scientific computing.

Read more

In the News

Physicists find dark matter: It's everywhere

From, Feb. 14, 2012

Elusive substance droops throughout intergalactic space to form all-encompassing web

A group of Japanese physicists has revealed where dark matter is — though not what it is — for the first time. As it turns out, the mysterious substance is almost everywhere, drooping throughout intergalactic space to form an all-encompassing web of matter.

Dark matter is invisible: It doesn't interact with light, so astronomers cannot actually see it. So far, it has only been observed indirectly by way of the gravitational force it exerts on ordinary, visible matter. On the basis of this gravitational interaction, physicists have inferred that dark matter constitutes 22 percent of the matter-energy content of the universe, while ordinary detectable matter constitutes just 4.5 percent.

Shogo Masaki at Nagoya University and colleagues at the University of Tokyo's Institute for the Physics and Mathematics of the Universe used computer simulations to model recent observational data of 24 million galaxies.

Read more

CMS Result

Peering deeper into the proton

When probed at smaller scales, protons seem to contain more and more quarks and gluons, represented here as colored blobs.

The LHC may help us discover new laws of physics, but it is already improving our understanding of the laws we thought we knew. Quantum Chromodynamics (QCD) is the force law that describes the attraction between quarks. It is believed to be correct because it made many predictions that were confirmed experimentally in the 1970s and 1980s. However, QCD is too mathematically complex to solve in general - only special cases have been precisely calculated.

One problem that has not been solved is the detailed structure of protons and neutrons, which together make up most of the everyday world. Both contain three primary quarks (up, up, down for protons and down, down, up for neutrons), a froth of quark-antiquark pairs appearing out of the vacuum and annihilating with each other and a swarm of gluons holding them all together. But how many? How strongly do they all stick together? These are hard questions to answer from the fundamental theory.

Experiments reveal this structure in protons by colliding them and observing how much energy is released at different angles. Higher-energy collisions are privy to finer detail, like microscopes with higher resolving power, because they are quick enough to get a snapshot of the short-lived quark-antiquark pairs and gluons before they fluctuate away. The LHC provides the sharpest image yet.

The experiments show that the closer you look, the more of these quarks and gluons you see, especially gluons. In fact, there are so many at the scales probed by the LHC that sometimes more than two of them collide when two protons pass through each other. In a recent paper, CMS physicists demonstrate that their measurements are more consistent with multiple quark/gluon interactions than any other known process.

This has many implications. It may indicate a transition to a new regime of QCD, where the density of quarks and gluons saturates - that is, they become so dense that they start overlapping and interacting in new ways. These effects are interesting in their own right, but they are also necessary to predict probabilities for creating new known and unknown particles.

Jim Pivarski

The two University of Iowa physicists pictured above made important contributions to this analysis.

The Computing Infrastructure Group in the CMS Computing Facilities Department installs, deploys, administers and troubleshoots thousands of Linux servers and worker nodes and more than 15,000 TB of storage.


Latest Announcements

Barn dance - Feb. 19

Gallery Series present Arianna String Quartet - Mar. 4

Fermilab Arts Series presents Eileen Ivers & Immigrant Soul - Mar. 10

No on-site prescription safety eyewear - Feb. 29

SciTech preschool open house -
Feb. 18 & 25

School's day out - Feb. 20

Lunchtime concert - Feb. 21

Outlook 2010: Intro. - Feb. 22

Embedded Design with LabVIEW FPGA and CompactRIO class scheduled - Feb. 23

Introduction to LabVIEW scheduled - Feb. 23

PowerPoint 2010: Intro. - Feb. 28

URA Visiting Scholars Program deadline - Feb. 29

The University of Chicago Tuition Remission Program deadline -
March 2

Word 2010: Intro Mar. 6

Excel 2010: Intro. - Mar. 8

Access 2010: Intro. - Mar. 14

FRA scholarship applications due Apr. 1

Python Programming class - April 16-18

Martial arts classes

Fermilab Management Practices courses are now available for registration

"5 Treasures" Qigong for stress relief

NALWO - Volunteers needed for English conversation

Requests for on-site housing for summer

International folk dancing Thursday evenings in Kuhn Barn

Scottish country dancing Tuesday evenings in Kuhn Village Barn

Open badminton at the gym

Winter basketball league

Indoor soccer

Atrium construction updates

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