From: Jude Kitching Sent: Wednesday, April 09, 2008 10:43 PM To: Acremann, Yves; Anfinrud, Phil; Bucksbaum, Phil; Castner, Edward Jr.; Cavalleri, Andrea; Crowell, Rob; David G. Cahill; DiMauro, Lou; Falcone, Roger; Finkelstein, Ken; Gaffney, Kelly; Gedik, Nuh; Heimann, Phul; Hopkins, Michael; Hupp, Joseph; Majumdar, Arun; Marjorie Ann Brockman; Martinez, Todd; McCusker, James; Merlin, Roberto; Miller, R.J.Dwayne; Nielsen, Martin; Nocera, Daniel; Orenstein, Joe; Pipe, Kevin; Rose-Petruck, Christoph; Scherer, Norbert; Schoenlein, Bob; Sension, Roseanna; Shakouri, Ali; Siwick, Brad; Taylor, Toni; Waldeck, David; Wasielewski, Michael; Yoo, Choong-Shik; Zink, Jeffrey; Zinth, Wolfgang Cc: J. Murray Gibson; Long, Gabrielle G.; Michael David Borland; Alireza Nassiri; Wang, Jin; Chen, Lin X.; Linda Young; Srajer, George; Efim Gluskin; Beno, Mark A.; David M. Tiede; David A. Reis; Paul G. Evans Subject: SPX Workshop on May 9 Dear Colleague, The Advanced Photon Source at Argonne will hold a one-day workshop on Short Pulse X-ray (SPX) Source on Friday, May 9. The Agenda, registration, and additional information are available at http://www.aps.anl.gov/Users/Meeting/2008/short-pulse.php The goals of this workshop are: 1. Review, propose and brainstorm on future science that will become possible with the unique capabilities afforded by the APS short-pulse CW source. Enable leading edge research in AMO, Chemistry, Condensed Matter Physics, Materials Science and Engineering. 2. Formulate a comprehensive path leading to a proposal to the DOE Office of Basic Energy Sciences requesting funds to implement a short-pulse x-ray source at the APS, and to instrument facilities for short-pulse experiments which may include both hard and soft x-rays. 3. Build and grow the ultrafast science user community to bring cutting-edge time-resolved science to the APS. At this workshop, we will be brainstorming on science enabled by picosecond, polarized pulses that are continuously tunable from the soft to hard x-ray regimes. The SPX source would operate during all timing modes of the Advanced Photon Source, provide megahertz repetition rates and be available year-round. The projected characteristics of the future APS SPX source are: pulse duration: 1 - 2 ps energy tunability: 200 eV - 100 keV repetition rate: 6.5 MHz photons/pulse: 104 at 0.0001 energy resolution, and 106 at 0.01 energy resolution availability: all of the APS operating modes As you may know, since the 2004 Lake Geneva Workshop, we have performed three years of detailed engineering design on crab cavities, their performance and impact on the storage ring, and can now propose the SPX as an imminent, medium cost upgrade to the APS. The proposed SPX significantly exceeds flux capabilities at current synchrotron-based slicing sources and represents a completely different parameter space than that of the LCLS. We feel that there are many untapped areas for research and that your perspective and insights would be invaluable. Because your research encompasses many possible applications that may benefit from the SPX source, we hope you will be able to attend the workshop to advise us on this new opportunity. There is no fee to attend, but we ask that you visit the web site to register so that you can enter the Argonne site easily. Sincerely, Gabrielle -- Gabrielle G. Long Director, X-Ray Science Division Advanced Photon Source - Building 401 Argonne National Laboratory 9700 South Cass Avenue Argonne, IL 60439 (p) 630-252-6012 (f) 630-252-3222