Wednesday, October 5
3:30 p.m. Director's Coffee Break -
2nd Flr X-Over
4:00 p.m. Fermilab Colloquium-1 West
Speaker: P. Davies, Macquarie University
Title: Multiverse Cosmological Models and the Anthropic Principle
Note: There will be no Fermilab ILC R&D meeting this week
Thursday, October 5
12:00 p.m. Wellness Works Brown Bag Seminar -
Speakers: Presented by Citibank and Local Law Enforcement
Title: Identity Theft
2:30 p.m. Theoretical Physics Seminar -
Speaker: M.-C. Chen, Fermilab
Title: Constraining New Models with Precision EW Data
Director's Coffee Break -
2nd Flr X-Over
4:00 p.m. Accelerator Physics and Technology Seminar -
Speaker: E. Prebys, Fermilab
Title: MiniBooNE and NuMI: Why Do They Need So Many Protons?
Wednesday, October 5|
- Portabello Harvest Grain
- Santa Fe Chicken Quesadilla
- Garlic Herb Roasted Pork
- Beef Stroganoff
- Maryland Crab Salad
- Meatlover's Pizza
- Pesto Shrimp Linguini w/Leeks and Tomatoes
The Wilson Hall Cafe accepts Visa, Master Card, Discover and American Express at Cash Register #1.
Wilson Hall Cafe Menu
Wednesday, October 5
-Ancho Fried Pork
-Moroccan Sweet Potatoes
Thursday, October 6
-Grilled Duck with Red Wine and Fig Sauce
-Wild Rice with Raisins
-Almond Orange and Olive Oil Cake
Chez Leon Menu
Call x4512 to make your reservation.
Fermilab has set a world record for peak luminosity of a hadron collider! Operations established store 4431 at 9:11 a.m. yesterday, October 4, with an initial luminosity, or brightness, of 141E30 cm-2sec-1. This record exceeds the previous Tevatron record by almost 8 percent, and it exceeds the world record for peak luminosity of a hadron collider achieved 23 years ago by the ISR proton-proton collider at CERN. The ISR achieved a peak luminosity of 140E30 cm-2sec-1 at a collision energy of 62 GeV. The Tevatron produces collisions between protons and antiprotons at a collision energy of 1960 GeV. The peak luminosity of the Tevatron has greatly increased since Fermilab began Run II in March 2001, and Fermilab expects to improve the Tevatron peak luminosity even further.
|Celebration to Honor 10th
Anniversary of Top Quark
It'll be a birthday party to remember; a celebration of the discovery of the top quark at Fermilab, a look at how that particle's "birth" has altered the physics field and a day to honor those who delivered it. The Top Turns Ten celebration, paying tribute to the now decade-old discovery, will be held from 1-5 p.m. on Friday, October 21 in Ramsey Auditorium and the Atrium.
A host of symposium speakers, including former Fermilab Director John Peoples and University of Pennsylvania theorist Paul Langacker, will address the challenges building up to the discovery, the triumph that ensued and how it has changed particle physics. "It's an afternoon of celebration, story-telling, and recollections," said Top Turns Ten committee chairman Chris Quigg, of the Theoretical Physics Department. "The top discoverers did the nearly impossible." CDF and DZero scientists, who were among the experimental physicists representing 74 institutions from around the world at the time of the discovery, will share their thoughts during the second half of the symposium.
But the 10-year anniversary celebration goes beyond the experimental collaborations. Posters will depict the involvement of groups throughout the laboratory, from Business Services to the Accelerator Division. The posters will be on display for about two weeks in the Atrium starting October 21.
Jeff Appel, Assistant Director for program planning, said he encourages the whole Fermilab community to participate in the event. "It was an exciting thing even if you didn't have any involvement in the discovery," he said. "One hopes to transmit that excitement to the people who weren't here then."
|Fermilab Takes Part in Scarecrow Festival
|The Einstein Scarecrow is smart enough to wear his helmet when he rides his bike. (Click image for larger version.)
Donning a helmet and his signature mop of white hair, a bicycling Albert Einstein will be entered in the St. Charles Scarecrow Festival this weekend as Fermilab's submission for the annual scarecrow contest. The Education Office, with the help of Fermilab engineers, will submit the Einstein scarecrow in the mechanical division of the festival. The electric-powered pedaling Einstein scarecrow is part of Fermilab's educational entry titled "Tour de Physics." An accompanying poster board asks passerby to identify what law gained Einstein a Nobel Prize in 1921. When the answer "photoelectric effect" is selected, a photo sensor attached to Einstein's bike is exposed to light and he stops pedaling.
To see Fermilab's Einstein entry, visit downtown St. Charles on Friday or Saturday from 9 a.m. to 5 p.m. or on Sunday from 9 a.m. to 4 p.m.
October 4, 2005:
Researchers transform the properties of matter with tunable quantum dots
Researchers at the University of Pennsylvania may not have turned lead into gold as alchemists once sought to do, but they did turn lead and selenium nanocrystals into solids with remarkable physical properties. In the October 5 edition of Physical Review Letters, online now, physicists Hugo E. Romero and Marija Drndic describe how they developed am artificial solid that can be transformed from an insulator to a semiconductor.
The Penn physicists are among many modern researchers who have been experimenting with a different way of transforming matter through artificial solids, formed from closely packed nanoscale crystals, also called "quantum dots."
|SDSS-II Supernova Survey Launched
|Top, typical spectrum of a supernova (SDSS 3952), at redshift
of just under 0.1. Below, pre-discovery and discovery image of SDSS
Supernova 1241, whose lightcurve peaked around September 20. (Click on image for larger version.)
In July of this year, the Sloan
Digital Sky Survey began a 3-year extension known as SDSS-II. The
Supernova Survey is an important new component of SDSS-II. A
supernova is an explosion of a star that leaves behind a neutron star,
black hole, or no remnant at all. The energy released by the explosion
can make a supernova outshine all the other stars in its
galaxy for a period of a few weeks.
Depending on the type and chemical composition of the star, the
explosions happen in different ways. The SDSS is mainly
after the so-called
"Type Ia" supernovae, which act as standard candles: at maximum
light, all Type Ia supernovae have about the same intrinsic luminosity,
about 1036 watts. By comparing the apparent brightness of
different supernovae, we can measure their relative distances
from Earth. By plotting supernova distances against their
redshifts (the shift in the frequency of light due to the
expansion of the universe), we can measure the
history of the cosmic expansion rate. Interest in this
technique heated up in 1998, when two teams of astronomers
announced that their supernova data indicated that the
expansion of the universe is speeding up instead of slowing
down. This implies that the universe is filled with a new
form of "dark energy" with properties completely unlike
ordinary baryonic or even dark matter. This picture was
subsequently corroborated by observations of the cosmic
microwave background radiation and of the large-scale distribution
of galaxies by the SDSS and other surveys.
The SDSS survey telescope and camera have the ideal combination of
sensitivity and large area coverage to find large numbers of
supernovae in the previously unexplored redshift range 0.1-0.3, where
supernovae are too faint to be found by smaller telescopes and too
sparse to be seen by larger telescopes with smaller fields of
view. The first of three annual supernova data runs is taking place
from September through November of this year. Every other night, the
survey camera scans the same part of the sky, covering about 300
square degrees in total. A dedicated image subtraction pipeline
compares the new data to older observations of the same part of the
sky, to quickly identify new, bright objects as supernova candidates.
The promising candidates are then observed spectroscopically with
several telescopes around the world (in New Mexico, Texas, Arizona,
Hawaii, and the Canary Islands) to confirm that they are indeed Type
Ia supernovae and to measure their redshifts.
Although the first week of the run was stymied by poor weather,
conditions subsequently improved dramatically, and the SDSS
researchers have so far identified 36 new type Ia supernovae. Over
the course of the next three years, the SDSS expects to measure
distances to on the order of 200 type Ia supernovae and thereby make
an important contribution to the study of dark energy. The Supernova
Survey is being carried out by an international team within the
SDSS-II collaboration, including scientists from Fermilab, the
University of Chicago, the University of Washington, Stanford and
SLAC, the University of Portsmouth, the University of Tokyo, Apache
Point Observatory, and the University of Notre Dame.
Lecture: Origami in Art, Science and Technology
Robert J. Lang, Artist & Engineering Consultant, will give a lecture on
Friday, October 7 at 8 p.m. in the Ramsey Auditorium. Admission is $5.
Other Upcoming Origami Lectures
Chris Palmer will lecture about his art on October 6th from 4-5 p.m. in Curia II. There will be an artist reception from 5-7 p.m. in the Fermilab Art Gallery , followed by another origami lecture by artist Lane Allen from 7 p.m. to 8 p.m. in Curia II.
October 11: Excel Advanced
October 12: Word Advanced
October 11, 12, or 26: Interpersonal Communication Skills
October 24-27: C++ for Embedded Programmers
Dine Out for American Hurrincane Victims
Today, October 5, the restaurants of America along with the National Restaurant Association, unite in support of Hurricane Katrina and Rita recovery by raising funds for the American Red Cross.
100% of the funds raised through Dine for America will support the American Red Cross Hurricane relief efforts.