Spring 2006 Aladdin Newsletter No. 40
Synchrotron Radiation Center
(click on an image for a larger version)
As many facility users know, the U2 undulator (one of four in the long straight sections of the square-shaped Aladdin ring) has been shared between three end stations—the VLS-PGM beamline, the Wadsworth beamline and the CNTech exposure station—each receiving about 30% available beamtime. With all three beamlines already in high demand, and with the additional beamtime needs of the new UW-Madison Nanoscale Science and Engineering Center (NSEC), satisfying user needs was expected to become more and more problematic. In response to this increasing demand the SRC developed a space between the dipoles that make a corner of the square storage ring with a new, 1-meter long undulator tailored to the EUV requirements of CNTech and NSEC.
This marks a significant step in improving services to many SRC users. The current SRC Beamtime Schedule shows that the U2 is 100% booked between the three beamlines with the CNTech EUV station getting 1 week every three weeks and the other 2 beamlines receiving alternating 2-week quanta. After relocating the EUV program, the remaining two beamlines will be shifted into a three-week quanta schedule akin to the rest of the SRC beamlines. The need to pattern nanoscale features with well-defined dimensions, tolerances and margins over large areas is inherent for fundamental research in nanoscale materials manufacturing. The ability to pattern nanoscale features over large areas will also have tremendous impact for research at the interface of nanotechnology and biology. The new EUV-optimized device and beamline will provide superior performance in a cleanroom environment to carry out this work and will be available 100% of the time.
In 2005, Advanced Design Consulting USA of Lansing, New York was chosen to fabricate the undulator with specifications shown in the following table. Installation of the device (as shown in the photos) into the Aladdin storage ring was completed on April 4, 2006 with final setup of beamline components under way. Initial operation of the device with its small vertical aperture beam pipe shows no appreciable effect on Aladdin beam operations. Full three-week quantum scheduling for the VLS-PGM and Wadsworth on the U2 will begin in fall 2006.
Table 1. Magnetic Parameters for the Undulator.
Undulator Type — PPM
Undulator Symmetry — Symmetric
Undulator Period — 41.6 mm
Number of Full Size Poles — 41
Total Number of Poles — 43
Minimum Gap — 21 mm
Maximum Gap — >= 80 mm
Length of Magnet Assemblies — 886 mm
Marking its fifth year, the SRC will take part in the Research Experiences for Undergraduates program again this year. As part of the program, undergraduates from around the country are partnered up with researchers at the SRC and are challenged to design and complete a research project over the course of the eight-week program. The students, their mentors and the projects are as follows:
Anladys Carreras, Barry University (FL)
Mentor: Carol Hirschmugl
IR Microspectroscopy of Living Algal Cells
Kathleen L DeWahl, Gustavus Adolphus College (MN)
Mentor: Hartmut Hoechst
Organic Thin Film Semiconductors: A growth and photoemission study
Adam C Jandl, UW-Madison
Mentor: Leon Shohet
SRC-Plasma Processing and Technology Laboratory
Marcus D Medley, UNC Charlotte
Mentor: Joe Bisognano
Next Generation Synchrotron Light Sources
Max M Young, University of Idaho
Mentor: Ralf Wehlitz
Multiple Ionization of Benzene by Photon Impact
As part of its vigorous community and educational outreach program, the SRC will host a fall Open House on Sunday, October 1 from noon to 5 P.M. Volunteers are needed to help make the event successful. Interested staff and users (and particularly graduate students and postdoctoral researchers) who are willing to participate in the event are encouraged to contact Chris Moore at firstname.lastname@example.org. Volunteers are needed to serve as tour leaders and to give short presentations about their work and their use of synchrotron light in their research programs.
As part of its commitment to informing the public about the wonders of light and the science of synchrotrons, the SRC took part in the 2006 Science Expeditions science fair—an assemblage of science labs and centers campus-wide for the public to learn about the wide range of science being done at UW-Madison. Chris Moore, Educational Outreach Coordinator for the SRC, wowed literally hundreds of visitors to the SRC booth about the science of light. A full story about the event is currently posted to the SRC main web page at: www.src.wisc.edu.
Alicia Medina, a graduate student in curriculum and instruction at UW-Madison, joined the SRC this winter as a graduate assistant. Alicia is working on the design of a comprehensive curriculum for the SRC summer course on the physics of light, which is a part of the PEOPLE program. From Bogota, Columbia, Alicia has a bachelor's degree in biology, has worked as a wildlife researcher studying woolly monkeys in tropical rainforests and has several years of experience as a science teacher.
As part of a significant push to tell the media and the public about the work done at the SRC, several articles were written over the recent months about research done by users of the facility. These articles can be found at: http://www.src.wisc.edu/news/archive.htmThanks to this coverage and particularly the subsequent reporting on the Web, SRC users have not only received increased world-wide exposure of their work but have even reported being queried about possible future collaborations. All users are encouraged to contact the SRC with information about forthcoming papers in research journals. Please contact SRC science writer, John Morgan if interested in collaborating on a story about your work.
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