Tuesday, Aug. 27, 2013

Have a safe day!

Tuesday, Aug. 27

3:30 p.m.


Wednesday, Aug. 28

10 a.m.
Research Techniques Seminar - Curia II
Speaker: Kieran O'Brian, University of Oxford
Title: Microwave Kinetic Inductance Detectors for Optical and Near-IR Astronomy

3:30 p.m.

4 p.m.
Fermilab Colloquium - One West
Speaker: Rene Brun, CERN
Title: My Journey through Scientific Computing

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Wilson Hall Cafe

Tuesday, Aug. 27

- Breakfast: All-American breakfast
- Breakfast: bacon, egg and cheese bagel
- Grilled reuben sandwich
- Smart cuisine: Caribbean jerk barbecue skewers
- Beef stew in a bread bowl
- Grilled-chicken Caesar jazz salad wrap
- Sweet and sour chicken
- Chef's choice soup
- Cuban black-bean soup
- Assorted pizza by the slice

Wilson Hall Cafe menu

Chez Leon

Wednesday, Aug. 28
- Assorted stuffed summer vegetables
- Gourmet greens with herb vinaigrette
- Buttered crepes with caramel and pecans

Friday, Aug. 30

Chez Leon menu
Call x3524 to make your reservation.


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Revamped Recycler features new cavity design

Robyn Madrak Plant, APC, and Dave Wildman, APC (below), designed new cavities for the upgraded Recycler. Photo: Dave Wildman

When Fermilab’s full accelerator complex kicks back into action this fall, it will bring with it a transition from high energy to high intensity, delivering more beam pulses with more particles. Among the many changes made and new equipment installed during the current shutdown are two new 53 MHz cavities in the Recycler ring, conceived of and designed by Accelerator Physics Center scientists Dave Wildman and Robyn Madrak Plant.

In its new iteration, the Fermilab accelerator complex will perform a process called slip-stacking in the Recycler Ring. Slip-stacking combines batches of protons to make a more intense beam. Before the shutdown, slip-stacking and acceleration couldn’t happen at the same time because the Recycler was used to store antiprotons; now, slip-stacking of protons can take place in the Recycler while the Main Injector accelerates another set of particle batches and fires them to various experimental areas. Instead of delivering proton pulses every 2.2 seconds, the Main Injector will now fire a pulse every 1.3 seconds.

“Instead of having to slip-stack in the Main Injector and then accelerate, we can be slip-stacking and accelerating at the same time,” Madrak Plant said. “Ultimately you get more beam through that way.”

The Main Injector previously had 18 cavities, which were essential for accelerating the beam, but they were not ideal for slip-stacking.

“The previous cavities were designed for accelerating a small amount of beam to very high energies very fast,” Wildman said. “In the future, we want to deliver lots of beam, high-intensity beam, so we need cavities that had different parameters. That’s what these cavities are.”

It took Wildman and Madrak Plant five years to see their cavities move from concept to reality. The idea for the cavities, which are now installed in the Recycler ring to perform the slip-stacking, came in part from a much smaller one designed about 20 years ago for the Main Ring accelerator. Then, Wildman and Madrak Plant built a prototype out of sheet metal, which allowed them to study their design and measure electrical parameters.

The new type of cavity is made out of solid blocks of high-conductivity, oxygen-free copper shipped from Japan. The block was heated in an oven for two days, then shaped into two large tubes. The tubes were welded together, one inside of the other, on one end. On the other end there is a gap with a large electric field. The voltage across the gap keeps the beam circulating in the machine at the desired frequency.

While the Recycler ring is being reused for slip-stacking, the cavity RF systems themselves feature recycled parts: Three RF stations from the Tevatron provide power to the new cavities, which saving money and reducing waste.

Accelerator operators expect to send first beam through the revamped Recycler in the next couple of months.

Laura Dattaro

Dave Wildman helps with construction of one of the cavities. Photo: Jim Wilson, AD
Photo of the Day

Opossum, hi possum

An opossum sniffs its way around the BEG building. Photo: Barb Kristen, PPD
In the News

An arguably unreal particle powers all of your electronics

From Nautilus, Aug. 19, 2013

Like happy families, every free electron is alike: They all have the same mass, the same electric charge, and the same spin. But inside a solid, various interactions can make electrons behave like entirely different particles. They may act as though their mass was hundreds or thousands of times larger, or as though they were entirely massless. The quantum mechanical spin and electric charge may become separated, with those quantities carried through the material at different rates. Electrons may pair up in superconductors, acting like a single particle that carries current with no resistance.

These strange behaviors come about because electrons within solids collectively behave like a fluid made up of quasiparticles, quantum entities that carry the electric currents that power all electric and electronic devices. The quasiparticles arise from electrons, but they can behave in strikingly different ways. Most strangely of all, they act like real particles: They have measurable mass and electric charge, and they obey the same physical laws that govern more ordinary types of matter.

Read more

Director's Corner

FermiWorks: modernizing the business of Human Resources

Jack Anderson

One of the key strategies highlighted in the Strategic Fermilab Agenda is streamlining and modernizing business processes to better support the laboratory’s mission and goals. Many of our current processes are paper-based and manual. Many of our information systems have not been refreshed in years. Modernizing will create a more efficient workplace for us all and will allow us to support our science mission more cost effectively.

A cornerstone of our modernization roadmap is updating how we manage human resources and carry out the electronic functions associated with our workforce. The lab has chosen a cloud-based product called Workday to support this modernization. The first phase of implementation of our new system, called FermiWorks, is underway and will go live in early 2014.

FermiWorks will allow employees and managers to perform all of the functions associated with job requisitions and hiring, performance management, benefits, organization management and HR requests of all types in a paperless and efficient manner. Most functions will be available on smart phones. Every employee will have access to the system, not only for information, but also for their individual goals, performance reviews and requests.

With this new system, we will have a single place to record and manage the many business processes required to support all of the people associated with the lab, including active employees, users, visitors and contractors as well as retirees and job applicants. This will greatly improve the efficiency of how we bring people into the lab and deal with visas and other requirements associated with foreign nationals. Overall, it will provide a much more advanced and productive work environment.

FermiWorks will provide the underlying support we need to improve other aspects of the way we do business, such as account management and electronic signatures and workflows. It will also provide us with a foundation to do better resource planning and forecasting and will support the modernization of our budget and planning system, the next initiative on our roadmap.

Construction Update

Phase I of MicroBooNE installation at LArTF continues

Half of the Intermediate Platform was re-installed to assist the installation of the cryogenic vent lines. The Phase 1 refrigeration plant is seen below the platform. Photo: Cindy Arnold

Phase 1 installation of the MicroBooNE experiment at the Liquid Argon Test Facility has made very good progress over the summer. The installation of the refrigeration plant for Phase 1 is nearing completion, and vacuum pump-down for leak testing of the refrigeration plant piping is expected to begin in early September.

The cryogenic vent lines have been installed, a process that required the temporary re-installation of one half of the intermediate work platform. The vent lines reach from the lower level over 50 feet almost to the roof of the LArTF. When all the cryogenic lines have been completely installed, the intermediate platform half-section will again be removed to permit the installation of the large MicroBooNE cryostat.

The MicroBooNE Phase 1 refrigeration plant installation is nearing completion. Photo: Cindy Arnold
Video of the Day

Why particle physics matters

Symmetry magazine recently asked scientists to explain—in about a minute, in their own words—why particle physics matters. Twenty-nine volunteers from 22 institutions stepped forward to do so on video. To see some of their best responses, watch the compilation video above. To see all of the videos, check out symmetry's YouTube channel.

And remember to vote for your favorite in symmetry's Why Particle Physics Matters video contest. Video: Fermilab


Today's New Announcements

MS Excel and Word classes offered this fall

Accelerate to a Healthy Lifestyle

Walk 2 Run starts Aug. 22

NALWO Aug. 29

Life on Mars - Fermilab Lecture Series - Sept. 13

Zumba Fitness and Zumba Toning coming soon

Scottish country dancing meets Tuesday evenings in Auditorium

International folk dancing in Auditorium for summer