ALSNews Vol. 215, February 5, 2003
ALSNews is a biweekly electronic newsletter to keep users and other interested parties informed about developments at the Advanced Light Source, a national user facility located at Lawrence Berkeley National Laboratory, University of California. To be placed on the mailing list, send your name and complete internet address to ALSNews@lbl.gov. We welcome suggestions for topics and content.
Previous Issues are available.
Table of Contents
- Segregation of Mixed Polymer Brushes
- SRI 2003 Call for Abstracts
- Update on ALS Expansion and Improvement Projects
- UEC Corner: Notes from the Users' Executive Committee
- Who's in Town: A Sampling of ALS Users
- Operations Update
1. SEGREGATION OF MIXED POLYMER BRUSHES
by Art Robinson
(Contact: A_Scholl@lbl.gov)
The chemical separation of mixed polymers into microphases represents a powerful and inexpensive tool for the fabrication of nanostructures. An international team comprising researchers from Germany and the Advanced Light Source has explored changes in the surface chemical structure of mixed polymer brushes exposed to different solvents. A brush consists of polymer chains chemically attached to a substrate. The team's observations, made with the photoemission electron microscope PEEM-2 at the ALS and an atomic force microscope (AFM), provide guidance for creating novel materials that adapt to their environment by changing their surface properties.
Read the full story at http://www-als.lbl.gov/als/science/sci_archive/60polymerbrush.html.
Publication about this research: S. Minko, M. Mueller, D. Usov, A. Scholl, C. Froeck, and M. Stamm, "Lateral versus Perpendicular Segregation in Mixed Polymer Brushes," Phys. Rev. Lett. 88, 035502 (2002).
2. SRI 2003 CALL FOR ABSTRACTS
(Contact: sri03@lbl.gov)
The Eighth International Conference on Synchrotron Radiation Instrumentation (SRI 2003) will be held August 25-29, 2003, at the Yerba Buena Center for the Arts in San Francisco, California. The conference, sponsored by the Stanford Synchrotron Radiation Laboratory and the ALS, will feature an exciting and comprehensive program covering new developments in synchrotron radiation sources and free electron lasers at photon energies from infrared to hard x rays, beamline instrumentation, and experimental techniques.
Contributed papers will be presented in oral and poster sessions. All meeting participants are invited to submit abstracts from which the presentations will be selected. Submission instructions and the abstract submission form are available at http://www.sri2003.lbl.gov/html/abstracts.html. The deadline for the submission of abstracts is Monday, March 3, 2003.
The main SRI 2003 Web page at http://www.sri2003.lbl.gov/ has additional information about SRI 2003, including a description of the meeting site; a preliminary program; online registration; accommodation, travel, and visa tips; tourist links; and a companion sightseeing program.
3. UPDATE ON ALS EXPANSION AND IMPROVEMENT PROJECTS
(Contacts: SLRossi@lbl.gov)
Construction of a support building to provide needed staging areas in Sector 4 is substantially complete. Although a number of small tasks remain, we may begin to occupy the space while this work continues. The ongoing Southside Expansion Project in Sector 12 continues to make progress. The interior demolition has been completed, making way for the recent installation of hutches for new Beamlines 12.2.2 (high-pressure diffraction) and 12.3.1 (protein crystallography), currently under construction. Weather-related delays, however, are putting into question the original April completion date. We have received funding to begin design work for completing the build-out of the Building 6 mezzanine, which will provide much-needed office space in close proximity to the experiment floor. Construction bidding is to begin in April, with construction commencing when funding is received, tentatively by mid-year.
Planning for the April 2003 shutdown formally kicked off this month. Major jobs scheduled for this shutdown include the survey and alignment of the storage ring, scheduled replacement of the cryocoolers on all three superbend magnets in operation, and the installation of higher-order mode (HOM) dampers on third-harmonic cavities 1, 2, and 3.
4. UEC CORNER: NOTES FROM THE USERS' EXECUTIVE
COMMITTEE
by Jennifer Doudna
(Contact: doudna@uclink.berkeley.edu)
As the new Chair of the Users' Executive Committee, I want to extend an invitation to all users to contact the members of the UEC with concerns or questions regarding the ALS Users' Group. I look forward to coordinating the efforts of the UEC in support of science at our facility.
As you may know, the UEC represents the over one thousand users of the ALS in a variety of venues, including discussions with ALS, Berkeley Lab, and DOE leadership.
The current membership of the UEC is as follows:
- John Bozek
- (Advanced Light Source, Berkeley Lab, JDBozek@lbl.gov, 2002-04)
- Gregory Denbeaux
- (Center for X-Ray Optics, Berkeley Lab, GPDenbeaux@lbl.gov, 2003-05)
- Dan Dessau
- (University of Colorado, dessau@spot.colorado.edu, 2003-05)
- Jennifer Doudna
- (University of California, Berkeley, doudna@uclink.berkeley.edu, 2001-03, Chair)
- Keith Jackson
- (Center for X-Ray Optics, KHJackson@lbl.gov, Berkeley Lab, 2003-05)
- Dennis Lindle
- (University of Nevada, Las Vegas, lindle@nevada.edu, 2001-03)
- Gerry McDermott
- (Physical Biosciences Division, Berkeley Lab, GMcDermott@lbl.gov, 2001-03)
- Gary Mitchell
- (The Dow Chemical Company, gemitchell@dow.com, 2003-05)
- Alexander Moewes
- (University of Saskatchewan, moewes@usask.ca, 2002-04)
- Yasuji Muramatsu
- (Japan Atomic Energy Research Institute, murama@spring8.or.jp, 2002-04)
- Eli Rotenberg
- (Advanced Light Source, Berkeley Lab, ERotenberg@lbl.gov, 2002-04)
- Sophie Canton
- (Western Michigan University, SECanton@lbl.gov, 2002-04, Student Member)
I would like to thank outgoing Chair Roger Falcone for his excellent leadership and successful efforts during 2002, both in Berkeley and with our sponsors in Washington. I'd also like to thank previous Chair Harald Ade for his continuing efforts on behalf of the ALS in Washington.
To briefly introduce myself to you, I have recently joined the Berkeley faculty as a member of the Molecular and Cell Biology and Chemistry departments and have been conducting experiments at the ALS for about five years. My research focuses on understanding the molecular structure and function of RNA and RNA-protein complexes using x-ray crystallography.
Please contact me with your ideas for the ALS.
5. WHO'S IN TOWN: A SAMPLING OF ALS USERS
Following are some of the experimenters who will be collecting data during the next two weeks at the ALS.
Beamline 1.4.3
John Bradley (Lawrence Livermore National Laboratory)
Gordon Brown (Stanford Univ.)
Ted Raab (Carnegie Institution of Washington)
Simon Clark (Berkeley Lab)
Raymond Jeanloz (Univ. of California, Berkeley)
Beamline 4.0.2
Chuck Fadley (Univ. of California, Davis, and Berkeley Lab)
Stefan Maat (IBM Almaden Research Center)
Beamlines 5.0.1, 5.0.2, 5.0.3
Timothy Osslund (Amgen)
Peter Hwang (Univ. of California, San Francisco)
Marc Jacobs (Vertex Pharmaceuticals)
Thomas Poulos (Univ. of California, Irvine)
Ning Zheng (Univ. of Washington)
Beamline 5.3.2
Adam Hitchcock (McMaster Univ., Canada)
Gary Mitchell (The Dow Chemical Company)
Beamline 6.3.2
David Allred (Brigham Young Univ.)
Beamline 8.0.1
Yasuji Muramatsu (Japan Atomic Energy Research Institute)
Oliver Hemmers (University of Nevada, Las Vegas)
Beamlines 8.2.1, 8.2.2
Jennifer Doudna (Univ. of California, Berkeley)
Wim Hol (Univ. of Washington)
John Kuriyan (Univ. of California, Berkeley)
Clare Peters-Libeu (Univ. of California, San Francisco)
Beamline 9.0.2
Laurie Butler (Univ. of Chicago)
Darcy Peterka (Berkeley Lab)
Andrew Kung (Academia Sinica, Taiwan)
Beamline 10.0.1
Alessandra Lanzara (Univ. of Rome)
Dan Dessau (Univ. of Colorado at Boulder)
Nora Berrah (Western Michigan Univ.)
Beamline 10.3.2
Frederic Panfili, Tatiana Kirpitchikova, Alain Manceau (Univ. Joseph
Fourier, France)
6. OPERATIONS UPDATE
(Contact: Lampo@lbl.gov)
For the user run of January 23 - 27, the beam reliability (time delivered/time scheduled) was 99%. Of the scheduled beam, 95% was delivered to completion without interruption. There were no significant outages.
Long-term and weekly operations schedules are available on the Web (http://www-als.lbl.gov/als/schedules/index.html). Requests for special operations use of the "scrubbing" shift should be sent to Bruce Samuelson (ALS-CR@lbl.gov, x4738) by 1:00 p.m. Friday. The Accelerator Status Hotline at (510) 486-6766 (ext. 6766 from Lab phones) features a recorded message giving up-to-date information on the operational status of the accelerator. A Web page showing the ring status in real time can be found at http://www-als.lbl.gov/als/status/.
ALSNews is a biweekly electronic newsletter to keep users informed about developments at the Advanced Light Source, a national user facility located at Ernest Orlando Lawrence Berkeley National Laboratory, University of California. To be placed on the mailing list, send your email address to ALSNews@lbl.gov. We welcome suggestions for topics and content. Submissions are due the Friday before the issue date.
LBNL/PUB-875
Editors: lstamura@lbl.gov, alrobinson@lbl.gov, amgreiner@lbl.gov
This work was supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098.