SLAC Today is
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In this issue:
The Strong Future of FELs
Science Today: D Meson Mixing—Might it be New Physics?
House Appropriations Committee Backs Full DOE Science Request
Thursday - June 14, 2007 |
The Strong Future of FELsThe future of science at SLAC is changing, and much of that future lies in the field of x-ray science. This shift in focus, embodied by the Linac Coherent Light Source (LCLS) now under construction, parallels recent advances in x-ray science that stand at the leading edge of how we investigate the structure of matter. In this week's edition of the journal Science, researchers Kelly Gaffney of SLAC's Photon Ultrafast Laser Science and Engineering (PULSE) center and Henry Chapman of Lawrence Livermore National Laboratory detail how breakthroughs in x-ray imaging techniques are paving the way for a new kind of science. Synchrotron accelerators have served as the foundation of light-source science for decades. Now, a new generation of linear-accelerator based free-electron lasers (FELs), such as the LCLS and the future European and Japanese x-ray FELs, are poised to take center stage. FELs have the advantage of creating extremely short pulses that are billions of times brighter than traditional x-ray sources, opening the door on investigations of phenomena too small or too fast to study with synchrotrons. The review paper by Gaffney and Chapman outlines the future of x-ray science in the context of several recent experiments that serve as a preview of things to come. Last fall, researchers using the FLASH facility in Hamburg demonstrated the exciting potential of FELs by capturing a diffraction image of a micron-sized target using only a single pulse of photons. Another group of researchers, led by SLAC physicist David Fritz, recently demonstrated how ultra-fast laser pulses can be used to capture images of atoms in motion. These two techniques—single-shot and ultra-fast imaging—stand to revolutionize x-ray science. On-site readers can access the full article at the SLAC Research Library website. |
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D Meson Mixing
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House Appropriations Committee Backs Full DOE Science RequestThe House Appropriations Committee has approved its version of the FY 2008 Energy and Water Development Appropriations Bill and sent it to the House floor for consideration later this week. Under this bill, H.R. 2641, the Bush Administration's request for the Office of Science for the upcoming fiscal year was fully funded. An advance copy of the report (110-185) accompanying the bill sets forth the recommendations of the Energy and Water Development Appropriations Subcommittee. The subcommittee is chaired by Rep. Peter Visclosky (D-IN); the Ranking Minority Member is Rep. David Hobson (R-OH). Portions of this report follow (note that there is minor variance in numbers): OVERALL OFFICE OF SCIENCE: According to the committee report, the FY 2007 appropriation for the Office of Science is $3,797.3 million. The Bush Administration requested $4,397.9 million. The House Appropriations Committee would provide $4,514.1 million, an increase of 18.9 percent or $716.8 million over this fiscal year.
The report states: |
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