Wednesday, June 25, 2014

Have a safe day!

Wednesday, June 25

3:30 p.m.


Thursday, June 26

Undergraduate Lecture Series (NOTE DATE) - One West
Speaker: James Hoff, Fermilab
Title: Electrical Engineering

2:30 p.m.
Theoretical Physics Seminar - Curia II
Speaker: Franz Herzog, CERN
Title: Reducing Higgs Theory Uncertainties by Threshold Expansion

3:30 p.m.

4 p.m.
Accelerator Physics and Technology Seminar (NOTE DATE) - One West
Speaker: Sam Posen, Cornell University
Title: Developing the Next Generation of SRF Cavities with Nb3Sn

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

Ongoing and upcoming conferences at Fermilab


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Wilson Hall Cafe

Wednesday, June 25

- Breakfast: breakfast strata
- Breakfast: ham, egg and cheese English muffin
- Grilled-chicken quesadilla
- Smart cuisine: baked Cajun catfish
- Shepherd's pie
- Italian antipasto panino
- Grilled- or crispy-chicken Caesar salad
- Sausage, potato and kale soup
- Texas-style chili
- Assorted calzones

Wilson Hall Cafe menu

Chez Leon

Wednesday, June 25
- Rotini, summer squash and prosciutto salad with rosemary dressing
- Fresh blueberry and vanilla yogurt parfait

Friday, June 27

Chez Leon menu
Call x3524 to make your reservation.


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From DOE Pulse

Supercomputers help answer the big questions about the universe

The USQCD collaboration aims to help experimenters solve the mysteries of the universe through high-performance computing. Image: Fermilab

The proton is a complicated blob. It is composed of three particles, called quarks, which are surrounded by a roiling sea of gluons that "glue" the quarks together. In addition to interacting with its surrounding particles, each gluon can also turn itself temporarily into a quark-antiquark pair and then back into a gluon.

This tremendously complicated subatomic dance affects measurements that are crucial to answering important questions about the universe, such as: What is the origin of mass in the universe? Why do the elementary particles we know come in three generations? Why is there so much more matter than antimatter in the universe?

A large group of theoretical physicists at U.S. universities and DOE national laboratories, known as the USQCD collaboration, aims to help experimenters solve the mysteries of the universe by computing the effects of this tremendously complicated dance of quarks and gluons on experimental measurements. The collaboration members use powerful computers to solve the complex equations of the theory of quantum chromodynamics, or QCD, which govern the behavior of quarks and gluons.

The USQCD computing needs are met through a combination of INCITE resources at the DOE Leadership Class Facilities at Argonne and Oak Ridge national laboratories; NSF facilities such as the NCSA Blue Waters; a small Blue Gene/Q supercomputer at Brookhaven National Laboratory; and dedicated computer clusters housed at Fermilab and Jefferson Lab. USQCD also exploits floating point accelerators such as Graphic Processing Units (GPUs) and Intel's Xeon Phi architecture.

Read more

Jim Simone, SCD

In Brief

Edward Tufte exhibit closes Thursday

The Feynman van, along with Edward Tufte's "Interplanetary Explorer," leaves Fermilab this week. Photo: Reidar Hahn

Tomorrow is your last chance to check out the second-floor art exhibit by Edward Tufte or to have your picture taken in front of "Interplanetary Explorer" or the Feynman van.

The exhibit "The Cognitive Art of Feynman Diagrams" closes Thursday, June 26.

Photo of the Day

Two on the ledge

A pair of turkey vultures hangs out on the 14th-floor ledge. Photo: William Badgett, PPD
In the News

Particle physics: U.S. should not cede research leadership to other nations

From San Jose Mercury News, June 22, 2014

A panel of eminent physicists recently issued a strong warning to policymakers: "Without the capability to host a large project, the U.S. would lose its position as a global leader in [high-energy physics] ..., and the international relationships that have been so productive would be fundamentally altered."

The Particle Physics Project Prioritization Panel (P5) underscored the point during a congressional hearing held on Capitol Hill earlier this month.

High-energy physics, or particle physics, at first blush is not the science of everyday life. Its primary objective is to probe the fundamental laws of nature and explore the mysteries of the universe. Its goal is not to produce new materials, advance medicine or enhance national security — but it has done those things and more.

Read more

From the Center for Particle Astrophysics

High five from P5

Craig Hogan

Craig Hogan, head of the Center for Particle Astrophysics, wrote this column.

To a physicist, the entire expanding universe is a unique measurement apparatus ideally suited to explore some of the deepest mysteries of physics. Its large-scale structure and evolution is dominated by the gravity of exotic dark matter and dark energy and detectably influenced by the gravity of neutrinos; its contents experience far more extreme conditions than any material we can create on Earth, even in the largest accelerators; and it is so simple on large scales that comparisons with theory can be made with high precision.

Indeed, the recent strategic report of the Particle Physics Project Prioritization Panel proposes cosmic experiments to engage all but the first of their five intertwined "scientific drivers:"

  • Use the Higgs boson as a new tool for discovery.
  • Pursue the new physics associated with neutrino mass.
  • Identify the new physics of dark matter.
  • Understand cosmic acceleration: dark energy and inflation.
  • Explore the unknown: new particles, interactions and physical principles.

There are a billion times more neutrinos in the universe than other matter particles; their cumulative gravity in large cosmic systems probably exceeds that of stars. We can measure their mass with a combination of future cosmic surveys and cosmic microwave background experiments that also probe cosmic acceleration.

The new physics of dark matter is probed with a set of experiments that aim to detect directly rare collisions of dark matter particles that make up the halo of our galaxy with atomic nuclei in very sensitive, deep underground detectors. Soon, a next-generation set of experiments will be chosen to challenge theoretical predictions for their abundance and interactions.

We seek to understand cosmic acceleration using various types of deep, wide surveys of the universe. The Dark Energy Survey and future surveys (DESI and LSST) use optical imaging and spectroscopy to measure positions and motions of objects such as supernovae, galaxies, intergalactic gas (via its effect on quasar light) and galaxy clusters, which map the geometry of space-time and its response to the dark energy that causes cosmic acceleration.

Next-generation studies of the cosmic microwave background (SPT-3G and CMB-S4) will map the polarization of the primordial background light in great depth and detail. They will not only help optical surveys to constrain models of dark energy in the universe today, but also uniquely probe the early-universe acceleration called inflation, as well as possible new forms of "dark radiation" that could have contributed to early expansion, and the sum of neutrino masses influencing large scale structures.

A unique probe of the quantum nature of space-time, the Fermilab Holometer, will soon constrain or uncover evidence for new physical principles governing the unification of matter and space-time at the Planck scale. We also pursue R&D on new detector technologies that may find application across a wide range of experiments.

The compelling case in the new report will help propel this exciting program forward. Along with our partners at labs and universities across the country, we look forward to making it a reality.

Safety Update

ESH&Q weekly report, June 24

This week's safety report, compiled by the Fermilab ESH&Q Section, contains no incidents.

Find the full report here.


Photo of welder

In Tuesday's Photo of the Day, we incorrectly stated that the welder pictured was a Fermilab employee. The welder is with Val-Fab Inc., a company based in Neenah, Wisconsin. The issue is now corrected. Fermilab Today regrets the error.


Today's New Announcements

Swim lessons session 2 deadline - June 30

Sitewide domestic hydrant flushing - June 28-29

Artist reception - July 2

Lecture - Technology for Advanced Neural Prostheses - July 11

Register for the C++ Fermilab software school - Aug. 4-8

New updates available for Mac computers

FermiWorks training for managers

Construction work at Main Ring Road and AZero

Scottish country dancing meets Tuesdays in Ramsey Auditorium

International folk dancing meets Thursdays in Ramsey Auditorium

Outdoor soccer