Friday, Sept. 12, 2014

Have a safe day!

Friday, Sept. 12

8 a.m.-12:30 p.m.
International Technical Safety Forum - One West

3:30 p.m.

4 p.m.
Joint Experimental-Theoretical Physics Seminar - One West
Speaker: Chris Neu, University of Virginia
Title: Latest Results on the Higgs Boson from CMS

8 p.m.
Fermilab Lecture Series - Auditorium
Speaker: Chad Mirkin, Northwestern University
Title: Nanotechnology: Learning to Think Big
Tickets: $7

Monday, Sept. 15

2 p.m.
Particle Astrophysics Seminar - Curia II
Speaker: Stefano Profumo, University of California, Santa Cruz
Title: New Physics and Indirect Dark Matter Detection

3:30 p.m.


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

Ongoing and upcoming conferences at Fermilab


Extended forecast
Weather at Fermilab

Current Flag Status

Flags at full staff

Wilson Hall Cafe

Friday, Sept. 12

- Breakfast: big country breakfast
- Breakfast: chorizo and egg burrito
- Backyard pulled pork burger
- Asian braised beef and vegetables
- Southern fried chicken
- Turkey and cucumber salad wraps
- Big beef or chicken burrito
- Shrimp gazpacho
- Texas-style chili
- Assorted pizza by the slice

Wilson Hall Cafe menu

Chez Leon

Friday, Sept. 12
- Stuffed grape leaves
- Herbed grilled lamb chops
- Horseradish mashed potatoes
- Roasted broccoli
- Baklava

Wednesday, Sept. 17
- Barbecue back ribs
- Creamy coleslaw
- Cocoa cappuccino mousse with cookies

Chez Leon menu
Call x3524 to make your reservation.


Fermilab Today

Director's Corner

Frontier Science Result

Physics in a Nutshell

Tip of the Week

User University Profiles

Related content


Fermilab Today
is online at:

Send comments and suggestions to:

Visit the Fermilab
home page

Unsubscribe from Fermilab Today

From symmetry

Forecasting the future

Physicists and other scientists use the GEANT4 toolkit to identify problems before they occur. Image: Sandbox Studio with Shawna X

Physicists can tell the future — or at least foresee multiple possible versions of it. They do this through computer simulations. Simulations can help scientists predict what will happen when a particular kind of particle hits a particular kind of material in a particle detector. But physicists are not the only scientists interested in predicting how particles and other matter will interact. This information is critical in multiple fields, especially those concerned about the effects of radiation.

At CERN in 1974, scientists created the first version of GEANT (Geometry and Tracking) to help physicists create simulations. Today it is in its fourth iteration, developed by an international collaboration of about 100 scientists from 19 countries. Anyone can download the system to a personal computer, use C++ programming language to plug in details about the particle and material in question and find out what will happen when the two meet.

GEANT4 is used in some of the most advanced accelerator experiments in the world, but its user base has grown beyond the particle physics community.

Read more

Monica Friedlander

Photos of the Day


Viceroy butterflies alight on late bonesets. Photos: Marty Murphy, AD
In Brief

FIRUS system upgrades to affect alarm system sitewide

The FIRUS system will undergo a software upgrade and system testing on Saturday, Sept. 13, from 9 to 11 a.m. This means that the FIRUS system will be offline during this time. It will not notify the Fermilab communication center of active fire-security-utility local alarms. The local building fire alarm systems and other independent emergency systems, including smoke detection, sprinkler systems, flammable gas alarms, pull stations and ODH alarms, will work locally.

In the event of a fire, occupants should follow the building's emergency plan by activating a pull station, evacuating the building and calling x3131 from a Fermilab office phone or 630-840-3131 from a mobile phone.

In the News

Linacs in all (linear) shapes and sizes

From LC NewsLine, Sept. 4, 2014

While the linear collider community is working on the most viable technologies for the two linacs that will one day accelerate electron and positrons efficiently, more than 200 linear accelerators — linacs — are already in use at research institutions around the world. Nearly 500 representatives from both operating and planned linear accelerators are meeting in Geneva these days to catch up on the latest news concerning linacs of all shapes (providing it's linear) and sizes. Electron linacs, proton linacs, ion linacs; superconducting linacs, normal-conducting linacs, low-energy linacs, high-energy linacs … it's all being covered at LINAC14.

Read more

In the News

New particle detector could reveal universe's missing antimatter

From LiveScience, Sept. 8, 2014

A new ultra-precise particle detector is being developed to investigate the bizarre properties and behaviors of tiny elementary particles that seem to defy the laws of traditional physics.

The U.S. Department of Energy recently awarded $1.2 million to a team of physicists from Indiana University's Center for Exploration of Energy and Matter to build the new particle detector.

The data collected by the new and improved detector, called Belle II, could advance "New Physics," or physics beyond the Standard Model.

Read more

Frontier Science Result: DES

Dark Energy Survey discovers new trans-Neptunian objects

These side-by-side images show the new minor planet 2013 QO95. The circled object in the left picture is roughly 200 kilometers in size and lies just beyond Pluto. The bright star in the image is too faint to be seen with the unaided eye. Images: Dark Energy Survey

Ever wish you could spend your summer vacation exploring someplace cool? Undergraduate students Ross Jennings and Zhilu Zhang, both of Carleton College, got to explore one of the coolest places in the solar system when they accepted research fellowships at the University of Michigan to work with Professor David Gerdes on a search for trans-Neptunian minor planets with the Dark Energy Survey. This faraway region of the solar system, more than five billion kilometers from the sun, is populated by thousands of small, icy worlds that take centuries to complete one orbit. These trans-Neptunian objects (TNOs) are believed to be leftovers from the primordial cloud that gave birth to the solar system.

To look for TNOs in Dark Energy Survey data, Gerdes and his students examined the 10 fields that DES visits roughly every five days to search for type Ia supernovae. This search uses difference imaging software to detect transient objects such as a supernova that brightens rapidly and then fades over the next few months. But it's also the perfect tool to find TNOs, which move from night to night against the background of fixed stars, yet slowly enough that they can stay in the same field of observation for weeks.

Gerdes, Jennings and Zhang started with a list of nearly 100,000 observations of individual transients, then linked different combinations with trial orbits to see which ones were consistent with a TNO. As more and more points were added to each candidate orbit, the team refined their calculations and made improved predictions for additional observations. By the end of the summer, the team had discovered five new TNOs.

The properties of the new objects reflect the rich dynamical structure of the trans-Neptunian region: One orbits the sun once for every two orbits of Neptune, and another makes two orbits for every five of Neptune. These orbital resonances protect the objects from disruptive close encounters with the giant planet. A third object has a highly elongated, 1,200-year orbit that is among the 50 longest orbital periods known. (Read more about the fourth and fifth objects.)

In the course of this summer project, the students learned a variety of skills, from Python programming to the mechanics of submitting results for publication.

But the most important thing, said Zhang, was this: "You need to really have a lot of enthusiasm for the research you are involved in, because there is a lot of repetition and tedious work involved in research, and it is not about discovering new things every day. However, the joy you get after you finally find something is so special that I haven't felt anything like that before in my entire life."

Now that's cool.

David Gerdes, University of Michigan

Planet hunters, from left: Zhilu Zhang (Carleton College), David Gerdes (University of Michigan) and Ross Jennings (Carleton College)

Nanotechnology lecture - today

Historical dance workshops, live music waltz party - Sept. 12-13

Barn Dance - Sept. 14

Bible Exploration for Lunch League starting Genesis study Sept. 16

NBI 2014 Workshop - Sept. 23-26

Mike Super at Fermilab - Sept. 27

Access 2010: Intermediate - Oct. 2

Interpersonal Communications Skills - Oct. 21

Excel 2010: Intermediate - Oct. 29

Writing for Results: Email and More (morning only) - Oct. 30

Managing Conflict course (morning only) - Nov. 5

Access 2010: Advanced - Nov. 12

Excel 2010: Advanced - Dec. 3

Abri Credit Union financial advisor

Help improve travel in Fox Valley region and to Fermilab

Featured eBook at the Fermilab Library

Scottish country dancing Tuesday evenings at Kuhn Barn

International folk dancing Thursday evenings in Kuhn Barn

English country dancing at Kuhn Barn

Indoor soccer

Batavia Smashburger employee discount

Find new classified ads on Fermilab Today.