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In this issue:
Carbon Joins the Magnetic Club
Colloquium Monday: Demystifying Open Access
Cellular Coverage at SLAC
Correction: Science Today

SLAC Today

Friday - May 11, 2007

A carbon film is hit by a high-energy proton beam, causing the magnetic moments of the atoms to align around the beam impact area and creating a ring-shaped magnetic pattern. (Click the image for a more detailed explanation.)

Carbon Joins the Magnetic Club

The exclusive club of magnetic elements officially has a new member—carbon. Using a proton beam and advanced x-ray techniques, researchers at SLAC in collaboration with colleagues from the University of Leipzig in Germany have finally put to rest doubts about carbon's ability to be made magnetic. The results appeared in the May 4 edition of Physical Review Letters.

Scientists have long suspected that carbon belongs on the short list of materials that can be magnetic at room temperature, but proof of that hypothesis has languished in controversy for nearly a decade. Since antiquity, magnetism has appeared to be a trick performed only by iron, nickel, cobalt and a handful of rare alloys.

"In the past, some groups thought they had discovered magnetic carbon," said Hendrik Ohldag, the paper's lead author and staff scientist at the Stanford Synchrotron Radiation Laboratory (SSRL). "Unfortunately, they realized later that they were misled by small amounts of iron, cobalt or nickel in their samples." Read more...

Colloquium Monday

In Monday's Colloquium, Salvatore Mele of CERN will present a short overview of the history of Open Access in high-energy physics (HEP).

The tenets of Open Access are to grant anyone, anywhere and anytime free access to the results of scientific research. HEP spearheaded the Open Access dissemination of scientific results with the mass mailing of preprints in the pre-WWW era and with the launch of the arXiv preprint system at the dawn of the '90s. The HEP community is now ready for a further push to Open Access while retaining all the advantages of the peer-review system and, at the same time, bring the spiralling cost of journal subscriptions under control. Mele will present a plan for conversion to Open Access of HEP peer-reviewed journals, through a consortium of HEP funding agencies, laboratories and libraries intended to engage scientific publishers toward building a sustainable model for Open Access publishing that is as transparent as possible for HEP authors.

Don't miss Demystifying Open Access this Monday at 4:15 p.m. in Panofsky Auditorium. Learn more...

Science Today

In yesterday's article "Science Today: BaBar Data Acquisition," we neglected to list Steffen Luitz as coauthor of the article.

Cellular Coverage

Some people with Cingular cellular phones have noticed degradation in coverage in a number of locations around SLAC that started approximately April 5. Cingular has confirmed that they have terminated their lease for an antenna on Building 50, and antenna that was previously shared by Cingular and T-Mobile. It is now used only by T-Mobile. In addition, Cingular has confirmed that they do not plan to add other antennas in our immediate vicinity during 2007.

The cellular companies treat their networks and any changes as proprietary and competitive information. Based on information available to the general public, we understood that Cingular planned to divest assets shared with T-Mobile, but we were not able to confirm a specific date for the termination of the sharing agreement. Since Cingular's acquisition of AT&T Wireless, they have chosen to focus on upgrading the former AT&T Wireless sites and acquiring their own new sites. This has resulted in a slightly different mix of coverage around the SLAC site and may or may not affect individual users.

The majority of SLAC cellular users were transferred to a new contract with T-Mobile in May 2006. T-Mobile continues to be SLAC's preferred cellular provider. We believe that they provide the best mix of service, support, and pricing to meet the needs of SLAC users.

If you plan to cancel a contract for a Cingular cellular phone provided by SLAC, please contact Teri Church for information on early cancellation penalties and limitations on number portability. Additional information on cellular service at SLAC and how to order cellular phones can be found in the SLAC Cellular Users' Guide.

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