APS User News-at-a-Glance
Issue 20: April 8, 2003

Contents:

1. Message from Murray: The APS in 20 Years
2. Users Meeting Draws Near, So Register Now!
3. Compton Award Winners Announced
4. N/X School Holds "Reunion" Workshop--Posters and Talks Invited
5. "Nuclear Lighthouse Effect" Studies Win BESSY Prize
6. Partner Users: Letters of Intent Due June 1
7. Results of General User Program Announced for Summer Run
8. Publications Database: A Comprehensive Record--With Your Help
9. Access Delays Possible May 12-16

 

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1. Message from Murray: The APS in 20 Years
(Contact: Murray Gibson, jmgibson@aps.anl.gov)

First of all, it is my pleasure to congratulate the winners of the 2003 Compton Award: Martin Blume, L. Doon Gibbs, Denis McWhan, and Kazumichi Namikawa. The award recognizes their pioneering theoretical and experimental work in resonant magnetic x-ray scattering (see story below).

Looking to the future for large facilities funded by the Department of Energy's Office of Basic Energy Sciences (BES), a recent workshop was held by the Basic Energy Science Advisory Committee (BESAC) in Rockville, Maryland, on February 22 and 23. The meeting was aimed at roadmapping for BES and was part of a larger effort led by the Director of the Office of Science at the Department of Energy, Ray Orbach, to form a 20-year strategy for construction of major scientific facilities.

We were asked to contribute a 20-year upgrade plan for the APS. I proposed a four-phase plan:
--Phase I: Construction and improvement of remaining beamlines.
--Phase II: Improvement of the x-ray source capabilities, e.g., by developments in insertion devices.
--Phase III: Rebuilding most of the beamlines, beginning 10 years or more from now, to take advantage of improvements in automation, detectors, and other equipment.
--Phase IV: Construction of a new storage ring using the existing beamports, together with a new injector.
Together, the upgrades through all four phases would improve the usable brilliance (from the experimenter's perspective) by almost four orders of magnitude. I am happy to say that the presentation was well received. BESAC strongly recommended support for upgrade of facility beamlines and source optimization (phases I and II), and supports long-term development of phases III and IV. (The BESAC report can be found at http://www.sc.doe.gov/production/bes/BESAC/20%20year%20report.pdf.) Responding in general to the upgrade proposals from the light sources (APS, NSLS, ALS, and SSRL), the committee recommended that DOE aggressively pursue an upgrade initiative, coordinated among the four light sources. Discussions on that subject with DOE-BES have been very positive.

The February workshop also included a presentation on a Greenfield Free-Electron Laser (GFEL) by Kwang-Je Kim, Associate Division Director of the APS Accelerator Systems Division. It represented consensus of a group including Jim Murphy from Brookhaven National Laboratory and John Galayda from Stanford Linear Accelerator Laboratory. The recommendations of that presentation were also supported very positively by BESAC: specifically, that the Linac Coherent Light Source (LCLS) is an essential and appropriate first step toward developing the necessary R&D and science programs for success of a GFEL, and that R&D in accelerator physics, optics, and experimental science at the national laboratories, in close collaboration with universities in the U.S. and with foreign partners, will insure the success of a GFEL and improve any linac-based light sources built over the next 15 years.

2. Users Meeting Draws Near, So Register Now!
(Contact: Susan Strasser, strasser@aps.anl.gov)

A Good news! You still have time to register for the APS Users Meeting without having to pay a late fee, but the April 15 deadline is approaching rapidly! Other deadlines: April 8 for abstracts (extended from April 1) and April 10 for guaranteed lodging at the Guest House.

The registration fee of $175 ($50 for students) entitles you to attend all scientific sessions, the Compton Award Lecture, both poster sessions, all workshops, and all exhibits. Lunch and banquet tickets are available at a nominal additional cost. This year's meeting organizers have been hard at work planning an excellent program with up-to-the-minute news from Washington, highlights of forefront science at the APS, comprehensive workshops, student events (presentations by alumni from the Argonne Neutron and X-ray Scattering School and student poster prizes), as well as wonderful social events (including a fiesta, complete with mariachi band). For further information, go to the Users Meeting website: http://www.aps.anl.gov/conferences/12um/.

Although the poster submission deadline is listed on the website as April 1, we will continue to accept poster abstracts after that date. However, to guarantee that your abstract will appear in the program/abstract book, we must receive it no later than April 10. Instructions for abstract submission are located at http://www.aps.anl.gov/conferences/12um/poster.htm.

The deadline for guaranteed lodging reservations at the Argonne Guest House is April 10; after that date, rooms will be available only on a space-available basis. You can make your reservations on-line at the following address:
http://www.aps.anl.gov/travel/anlghhome.html.

3. Compton Award Winners Announced
Contributed by Michael Rowe, Scientific Advisory Committee Chair
(Contact: Paul Zschack, zschack@anl.gov)

The Advanced Photon Source (APS) and APS Users Organization (APSUO) are very pleased to announce that Martin Blume, L. Doon Gibbs, Denis McWhan, and Kazumichi Namikawa have won this year's Arthur H. Compton Award for their pioneering theoretical and experimental work in resonant magnetic x-ray scattering, which has led to important applications in condensed matter physics. The award plaques and monetary prize will be presented during the Twelfth Users Meeting for the APS, at which Martin Blume will deliver the Compton Award lecture.

Magnetic resonance scattering was first predicted in 1985 by Blume in a seminal theoretical paper [J. Applied Physics, 57, 3615 (1985)] that derived the magnetic scattering cross section in a quantum mechanical formalism readily understandable to experimenters. The effect was first observed experimentally by Namikawa, working with Ando, Nakajima, and Kawata at the Photon Factory in Tsukuba, Japan. Their work was carried out with synchrotron radiation tuned to energies close to the K absorption edge of Ni metal and clearly demonstrated a resonantly enhanced magnetic scattering cross section at the Ni K edge. Their results, which were published in J. Phys. Soc. Japan 54, 4099 (1985), were interpreted on the basis of the theoretical work by Blume published earlier in 1985. Large resonance enhancements, which put resonance scattering into the consciousness of the synchrotron community, were observed in 1988 at the Cornell High Energy Synchrotron Source (CHESS) by a team led by Gibbs and McWhan [D. Gibbs, D. Harshman, E. Isaacs, D. B. McWhan, D. Mills and C. Vettier, Phys. Rev. Lett. 61, 1241 (1988)]. The importance of this paper lies in its influence and impact on the x-ray and magnetism community, clearly establishing x-rays as a viable alternative to neutrons for the study of magnetic structure.

4. N/X School Holds "Reunion" Workshop--Posters and Talks Invited
(Contact: Dean Haeffner, haeffner@aps.anl.gov)

The APS invites alumni of the National School for Neutron and X-ray Scattering to propose posters/talks for the Users Meeting. A half-day workshop on Tuesday, April 29, will feature talks selected from among the submitted posters. Talks and posters are not limited to work done at the APS, but they should fall in the general range of subjects covered during the N/X School. To submit a poster and register for the workshop, go to http://www.aps.anl.gov/conferences/12um/. Many N/X alums have moved on and we don't have current addresses, so please spread the word about the workshop by sharing this information with any N/X school alumni you know!

5. "Nuclear Lighthouse Effect" Studies Win BESSY Prize
(Contact: Ralf Röhlsberger, rroehlsb@physik.tu-muenchen.de)

A new technique for high-resolution x-ray scattering spectroscopy developed at the Advanced Photon Source has garnered an award for innovation in synchrotron radiation research.

Ralf Röhlsberger, Professor of Physics at the Technische Universitaet Muenchen, is a recipient of the "Innovationspreis Synchrotronstrahlung 2002" ("Innovation Prize in Synchrotron Radiation 2002") prize awarded annually by the Friends of BESSY. The award, which honors "new developments in the field that provide access to and use of synchrotron radiation," was presented for Röhlsberger's "groundbreaking work in the nuclear resonant scattering of synchrotron radiation," the so-called "Nuclear Lighthouse Effect," a method that opens new avenues for spectroscopic investigations.

The method uses a sample that is spinning at up to 35,000 rotations per second. Incoming x-rays are not re-emitted in the forward direction but rather sweep over a certain angular range, similar to the way the beam from a lighthouse sweeps out across coastal waters. The characteristics of the sweep depend on the lifetime of the excited nuclear state and the rotation speed of the sample. Using this method, magnetic materials, for example, may be measured with extraordinary precision without the need to operate the synchrotron radiation source in a particular bunch mode. For further details, see http://www.aps.anl.gov/aps/news/20030129a.html.

6. Partner Users: Letters of Intent Due June
(Contact: Susan Strasser, strasser@aps.anl.gov)

The APS will soon be accepting letters of intent from individuals or groups seeking to become new APS partner users for the run beginning October 2003. The partner user concept was introduced to accommodate users whose activities lie outside the scope of the general user program. In particular, it is expected that partner users will not only carry out scientific experiments of high impact, but will also improve the facility to the benefit of general users. Such improvements might include construction of a new instrument or endstation, or building of a new user community. Collaborative Access Teams (CATs) are seen as important special examples of partner users, but the concept has been broadened to add flexibility. Proposals from new partner users will be reviewed by the Scientific Advisory Committee of the APS. New partner user proposals can be submitted only on a sector in which there is not an active CAT allocated 75% of the time. The fraction of total time allocated to all partner users on a sector cannot under normal circumstances exceed 75%, unless the sector is fully operated by APS, in which case the total partner user fraction cannot exceed 50%. Partner user proposals will take the form of a letter of intent, with possible need for further materials depending on the scope of the proposal. All accepted proposals will be re-evaluated annually, and allocated time will be based on performance. More details on the partner user proposal process will be released by the time of the APS User Meeting. The deadline for proposals for the October run will be June 1.

7. Results of General User Program Announced for Summer Run
(Contact: Jane Andrew, jandrew@aps.anl.gov)

General Users have been notified of their beam time allocation for the summer run. We received 356 requests for time, up from 322 in the first cycle. Of these, 46% (155) were allocated time under the General User Program. (About 70 more received time under the National User Facility programs of several beamlines.) Of the requests, 280 were on new proposals and 56 were requests against existing proposals. Requests that received time had an average score of 2.1, while the average score of all requests was 2.4 (on a scale of 1 to 5, where 1 is best).

The deadline to request time for the fall run is August 1, 2003. Please remember that you must submit a beam time request for each cycle in which you want time. If you already have a proposal, go to the section "Beamtime Request" and click the link "New Beamtime Request" to begin. Be sure to click "Submit" when you are finished. The proposal system is at http://beam.aps.anl.gov/pls/apsweb/gup0005.start_page.

8. Publications Database: A Comprehensive Record of APS Research--With Your Help
(Contact: Richard Fenner, fenner@aps.anl.gov)

General The APS Publications Database, a web-based, searchable compendium of information on results from research at the APS, is the official source for listings of APS-related publications. It is the source for reports to APS review and advisory committees (including the APS Scientific Advisory Committee); the U.S. Department of Energy; and other government agencies. Maintaining complete and up-to-date records is of great importance to the facility and its users.

We appreciate your help in keeping this important database current. We hope that the database can also be valuable to you. It can be searched in many ways, and is accessible at:
http://beam.aps.anl.gov/pls/apsweb/pub_V2_OPEN_0006.review_start_page.

Please note that the database is also the repository for dissertations, abstracts, awards, and invited talks. In this way, we hope to build a comprehensive record of information about research at the APS.

For details on how to make sure your publications are included, go to: http://www.aps.anl.gov/user/news/pub_enter_instruct.html.

9. Access Delays Possible May 12-16
(Contact: Susan Strasser, strasser@aps.anl.gov)

During the week of May 12-16, Argonne National Laboratory will participate in a major international emergency exercise sponsored by several federal and state agencies. Entrance to the Argonne-East site during this time will be affected, as the gates will likely be subject to increased security and inspection. Please allow additional time to enter the site during that week.

In addition, another access change is in effect until further notice: APS users must enter Argonne by the main gate, even if they have a permanent badge. Currently, the west and east gates are open only to Argonne and DOE employees.

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