Wednesday, April 20, 2011

Have a safe day!

Wednesday, April 20
2 p.m.
LHC Physics Center Topic of the Week Seminar - Sunrise, WH11NE
Speaker: Charles Plager, University of California, Los Angeles
Title: Top Quark Physics: Past, Present, and Future – Part 1
3:30 p.m.
4 p.m.
Fermilab Colloquium - One West
Speaker: Neil Shubin, University of Chicago
Title: Fossils, Genes and the Origin of Organs

Thursday, April 21
2 p.m.
LHC Physics Center Topic of the Week Seminar - Sunrise, WH11NE
Speaker: Charles Plager, University of California, Los Angeles
Title: Top Quark Physics: Past, Present, and Future – Part 2
2:30 p.m.
Theoretical Physics Seminar - Curia II
Speaker: Josh Erlich, College of William and Mary
Title: Phases of Holographic QCD
3:30 p.m.

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Wilson Hall Cafe

Wednesday, April 20

- Breakfast: English muffin-sandwich
- Cajun-style lentil soup
- *Cajun chicken ranch
- BBQ ribs
- Chicken parmesean
- Smoked-turkey panini w/ pesto mayo
- Assorted sliced pizza
- Chicken Alfredo fettuccine

*Heart healthy choice

Wilson Hall Cafe Menu

Chez Leon

Wednesday, April 20

- Masala poached mahi mahi
- Gingered mango cucumber raita
- Coconut rice
- Cinnamon crepes w/ fresh berries

Friday, April 22
- Closed

Chez Leon Menu
Call x3524 to make your reservation.


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Three cheers for niobium tin

This 4-meter-long quadrupole coil recently achieved the ultimate magnetic-field strength expected for niobium tin coils of this design.

This month, scientists are celebrating the centennial of the discovery of superconductivity, a fundamental phenomenon that has made possible the newest achievement in Fermilab’s Technical Division.

Shortly before the anniversary, researchers with the laboratory’s High Field Magnet (HFM) program successfully demonstrated optimal performance of a 4-meter-long niobium tin quadrupole coil in the temperature range from 1.9 to 4.6 Kelvin.

The achievement is an important milestone toward developing niobium tin magnets as a viable technology for accelerators.

“We’ve finally achieved the ultimate niobium tin coil performance,” said Alexander Zlobin, head of the HFM program.

Magnet coils in accelerators such as the Tevatron and the Large Hadron Collider are made of niobium titanium. Scientists would like to ramp up accelerators’ magnetic-field strength by instead using niobium tin, a brittle but more highly superconducting material.

Since 2005 Fermilab scientists have conducted niobium tin studies in support of the LHC Accelerator Research Program (LARP), a U.S. collaboration that contributes R&D for LHC upgrades. One of LARP’s goals is to demonstrate by 2014 that the technology is a good option for the LHC.

To that end, the HFM group has been experimenting with new processes for making quadrupole coils.

In recent months, the HFM group developed new coil insulation. They also redesigned the conductor previously used in LARP’s long quadrupole magnet by implementing twice as many smaller-diameter niobium tin filaments.

After many tests using shorter coils and a so-called mirror structure, they tested the new niobium tin conductor and insulation in a 4-meter-long LARP quadrupole coil.

The group achieved a stable field of 12.3 Tesla at 4.5 Kelvin. At 1.9 Kelvin, they achieved a stable 13.3 Tesla.

“The small filaments worked great,” said Giorgio Ambrosio, leader of the LARP long-quadrupole program. “Once you make this technology available for accelerator magnets, it can be used for the LHC, a muon collider, or a neutrino factory. It can be used anywhere.”

--Leah Hesla

The Fermilab-developed and -assembled mirror structure used in tests of 4-meter-long niobium tin quadrupole coil. In a quadrupole mirror structure, three of the four poles are iron blocks rather than coils. The design produces conditions close to the real magnet but drastically reduces cost and processing time.
In the News

Obama to nominate U of C President to National Science Board

From CBS Chicago, April 19, 2011

President Obama has a tapped a Chicago area educator to a key national science post. WBBM’s Steve Grzanich reports.

The NSF provides funding for approximately 20 percent of all federally supported research conducted in US colleges and universities. it’s also the major source of funding mathematics, computer science and the social sciences fields.

Along with the NSF director, the board recommends national policies for the promotion of research and education in science and engineering, according to a release from the University of Chicago. The board oversees NSF’s operational and programmatic aspects, including its $7 billion budget. It also serves as an apolitical, independent body of advisors to the president and Congress on policy matters related to science and engineering.

“The pursuit of scientific discovery and innovation is essential for our nation’s future, and the National Science Foundation plays a crucial role in forming a vision to carry American research forward,” Zimmer, who chairs the governing boards of both Argonne National Laboratory and Fermi National Accelerator Laboratory, said. “Having the opportunity to contribute to this valuable work is an honor for me, and moreover it reflects the University of Chicago’s position as a global leader in research.”

Read more

From the Accelerator Physics Center

Progress on Project X

Steve Holmes, project manager for the proposed Project X, wrote this week’s column.

Steve Holmes

Last week, about 70 people from the Project X collaboration gathered at Oak Ridge National Laboratory for the collaboration’s first meeting away from Fermilab. The selection of ORNL as the first non-Fermilab host was particularly appropriate because the laboratory’s Spallation Neutron Source is the first, and so far only, superconducting proton linear accelerator in the world capable of delivering in excess of one megawatt of beam power. This makes it an extremely valuable tool for learning about issues related to the proposed Project X accelerator at Fermilab.

Attendees at the meeting represented the 10 U.S. institutions and four Indian laboratories engaged in the Project X collaboration. In addition, interested colleagues from CERN and the European Spallation Source joined our presentations and discussions. We were treated to a wonderful Tennessee spring, featuring blooming dogwood and red bud, and enjoyed the traditional southern hospitality supplied by our hosts.

This meeting took place during a time when we’d been working closely with the Department of Energy to achieve Critical Decision-0, which would establish the mission need for Project X. In support of this goal, we have created a reference design that foresees a broad research mission for Project X. The accelerator would produce intense particle beams for experiments aimed at the exploration of the physics behind rare subatomic processes as well as long-baseline neutrino experiments. Project X would also provide research opportunities outside of high-energy physics and could serve as the first stage of a future Muon Collider.

The Project X reference design is based on a 3-GeV continuous-wave superconducting linear accelerator augmented by a pulsed linac that would accelerate protons from 3 to 8 GeV for transfer into our existing Recycler/Main Injector complex. We believe this configuration offers opportunities that are unique among facilities either in operation or in the design stage anywhere in the world.

The goals of our meeting were to discuss the technical basis for the reference design, identify technical issues and establish plans for the R&D effort over the next two years. This includes the assignment of particular R&D tasks to specific institutions. We also took advantage of the presence of a large number of SNS personnel to learn from their experiences in operating a high-intensity proton facility.

We made significant progress at understanding the design of the front end of the Project X linac, in particular, concepts for a wideband chopper that is the key to supporting multiple experiments with differing beam requirements. We addressed questions related to the superconducting acceleration systems, the promise of solid-state-based radio-frequency power sources, and the possibility of utilizing high-power lasers to create proton beams for accumulation in the Recycler by stripping electrons from negative hydrogen ion beams. These discussions, and several associated decisions, will directly feed into the update of the current reference design.

Our plans for Project X are moving ahead, and we are looking forward to reconvening for the next collaboration meeting this fall at Fermilab.

Safety Update

ES&H weekly report, April 19

This week's safety report, compiled by the Fermilab ES&H section, includes two recordable incidents: an employee lacerated a finger on a metal cabinet and another employee suffered a broken finger when hit by the door of a portable toilet blown open by wind.

Find the full report here.


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