Monday, Sept. 12, 2011

Have a safe day!

Monday, Sept. 12
3:30 p.m.
4 p.m.
All Experimenters' Meeting - Curia II
Special Topics: First Shipment of BNL Equipment for g-2 to Fermilab; GEM Chamber Test (T-1010) at FTBF
5:30 p.m.
Budker Seminar - Music Room at Users' Center
Speaker: Viktoriya Zvoda, Fermilab
Title: Advanced Bent Crystal Collimation Studies at the Tevatron (T-980)

Tuesday, Sept. 13
3:30 p.m.
4 p.m.
Accelerator Physics and Technology Seminar - One West
Speaker: Stephen Webb, Stony Brook University
Title: Free-Electron Laser Theory for Coherent Electron Cooling

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a weekly calendar with links to additional information.

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Secon Level 3

Wilson Hall Cafe

Monday, Sept. 12

- Breakfast: Croissant sandwich
- Spicy beef & rice soup
- Corned beef reuben
- Smart cuisine: Roast pork loin
- Smart cuisine: Lasagna
- Chicken oriental wrap pineapple
- Assorted sliced pizza
- Pacific Rim rice bowl

Wilson Hall Cafe Menu

Chez Leon

Wednesday, Sept. 14
- Buttermilk pecan chicken
- Sweet potatoes
- Sautéed zucchini
- Apple crisp cake

Friday, Sept. 16

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

ILC NewsLine


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Special Result of the Week

Hunting for dark matter

COUPP made significant progress in the search for spin-dependent interactions of dark matter, where the dark matter couples to the spin of the target nucleus. The x-axis represents the mass of a dark matter particle, while the y-axis measures the likelihood of having an interaction. COUPP is currently the most sensitive direct detection experiment for spin-dependent dark matter.

The hunt for missing mass in the universe is heating up, with some experiments reporting potential dark matter signals, while others are reporting null results in apparent conflict with those signals. Recently, the Fermilab-based Chicagoland Observatory for Underground Particle Physics (COUPP) collaboration completed a dark matter search at the deep underground site, SNOLAB, in Ontario, Canada. With the results from this search, COUPP improved their previous limits on dark matter by more than a factor of 10. They can now rule out part of the region where other experiments appear to have seen a signal.

To conduct a dark matter search, COUPP utilizes a technology deeply rooted in Fermilab’s past - the bubble chamber. A bubble chamber consists of a fluid heated beyond its boiling point, or superheated, but is unable to boil without a rough surface on which to form bubbles.

In such a superheated fluid, bubbles can form despite the liquid not boiling.

Read more

—Hugh Lippincott

Photo of the Day

A butterfly snacks on a flower

A butterfly snacks from a flower near Lederman Science Center. Photo: Marty Murphy, AD
In the News

Last words

From Science News, Sept. 9, 2011

Tevatron’s data may have more to say, even after the atom smasher shuts down

The most powerful atoms smasher in the United States will soon smash no more.

Known as the Tevatron, this 6.3-kilometer subterranean ring was once the biggest, baddest physics machine in the world. For 26 years it has been slamming together bits of matter and antimatter moving at nearly the speed of light. These violent collisions spit out new particles never before seen by humankind, revealing some of nature’s deepest secrets.

Yet for all its past achievements, the Tevatron’s time has come. Facing a tight budget, the U.S. Department of Energy will shutter the aged machine on September 30.

Read more

From SLAC Today

How slow is slow? EXO knows!

Cooks think of watched pots. Handymen grumble about drying paint. Kids dread the endless night before Christmas morning.

Turns out physicists have their own expression to convey the concept of "slow," and now, thanks to the Enriched Xenon Observatory (EXO), they know how slow "slow" really is: The flurry of activity during the 13.75 billion years from the Big Bang to us was positively hasty in comparison.

The expression is "2nubb" and it stands for "two-neutrino double-beta decay", a rare type of particle decay undergone by certain forms of radioactive elements. In this type of decay, two neutrons, the neutral subatomic particles in the nucleus of an atom, spontaneously decay into two protons, two electrons, and two antineutrinos, which are the antimatter twins of the tiny, nearly massless mystery particles called neutrinos.

Read more

ES&H Tip of the Week:

What needs calibration?

It's important to make sure your measurement tools are accurate. Even a slight discrepancy may cause major problems in your work.

There are potentially deadly consequences of failing to calibrate tools. For instance, improper calibration of the vehicle’s hydraulic control valves had the potential to limit control of the right front brake.

Calibration is the process by which you verify the tool or measuring device that you’re using is giving you the correct readings. Just like the auto industry, we calibrate many things at Fermilab, from tools used to measure size and weight to processes used to monitor the spread of the beam.

The key to determine if an item needs to be calibrated is what the data it supplies is used for. In other words, if the data is used to adjust hydraulic controls, as mentioned above, that item needs to be calibrated. If the item is being used to measure 10 feet of wire for installation into a light circuit, that probably doesn’t need to be calibrated.

A good rule of thumb to decide whether your item needs calibration or not is to ask yourself: “What will happen if the measurement is wrong?” In the case of the wire, if you cut it too long, you still can trim it down. If you cut it too short, you can cut another piece. In the case of the hydraulics above, with the poor control of the brakes, that’s a big deal.

So the key is to remember what will happen if the measurement is wrong. If the consequence is potentially nasty, better use a calibrated item.

—Edited by Tom Gehrke

Special Announcement

Street corner science:
Dr. Leon Lederman

The Chicago Council on Science and Technology continues its Street Corner Science series with "Ask a Nobel Laureate" on Saturday, Sept. 24. Dr. Leon Lederman will be in front of the Chicago Wrigley building Saturday afternoon, ready to answer any of your questions about science, technology and the physical world.

For more information, visit the Chicago Council on Science and Technology's website.

Accelerator Update

Sept. 7-9

- Two stores provided ~25 hours of luminosity
- Low-energy Tevatron studies performed
- PA for LRF1 was replaced

Read the Current Accelerator Update
Read the Early Bird Report
View the Tevatron Luminosity Charts


Budker Seminar - today

Artist reception- Sept. 14

Argentine Tango in Ramsey Auditoium - Sept. 14 and 21

ACU presents "Retire On Your Terms" - Sept. 15

Bohr and Heisenberg at Elgin Arts Theatre - Sept. 16-25

Fermilab Arts Series presents Inca Son: Music and Dance of the Andes - Sept. 17

Fermilab Lecture Series presents "The LHC Voyage of Discovery" - Sept. 23

Introduction to LabVIEW course - Sept. 27

Weight Watchers at work

Chess players wanted

Accelerate to a Healthy Lifestyle Program continues

Athletic leagues: Outdoor soccer Tuesdays and Thursdays

Bowlers wanted for 2011/2012 bowling season

Fermilab photography club

Open badminton

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