Short Pulse X-rays at the APS

Workshop Summary

Friday, May 9, 2008
Building 401, Room A5000

Organizers: Jin Wang (Argonne National Laboratory), Lin Chen (Argonne National Laboratory), David Reis ( University of Michigan ), Paul Evans ( University of Wisconsin ), Ali Nassiri (Argonne National Laboratory), and Linda Young ( Argonne National Laboratory)


Registration - complete the visitor registration form. For "purpose of visit," please enter "APS SPX Workshop"

On-site lodging is at the Argonne Guest House

Travel to Argonne National Laboratory

There is no charge for this workshop.

Since the 2004 Lake Geneva Workshop, the APS has performed three years of detailed engineering design on crab cavities, their performance and impact on the storage ring, and can now propose the short pulse x ray (SPX) source as an imminent, medium cost upgrade to the APS. The SPX significantly exceeds flux capabilities at current synchrotron-based slicing sources, and represents a completely different parameter space from that of the LCLS. The goal of this Workshop is to identify the many untapped areas for research and novel applications that would be enabled by the realization of an Argonne SPX.

Goals of the May 9 APS SPX Workshop:

  • 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.
  • 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.
  • Build and continue to grow the ultrafast science user community for cutting-edge time-resolved science to the APS.

Projected characteristics of the future APS SPX source:

pulse duration:
1 - 2 ps (above 4 keV)
energy tunability:
200 eV - 100 keV
repetition rate:
6.5 MHz

104 at 10-4 energy resolution
106 at 10-2 energy resolution

all of the APS operating modes


  Session 1 Chair: Linda Young
8:45 - 8:55 Introduction and welcome to the workshop
J. Murray Gibson, Argonne National Laborator
9:00 - 9:08 Overview of the CW picosecond source project at the APS
Ali Nassiri, Argonne National Laboratory
9:10 - 9:25 Expected performance for the CW picosecond source
Michael Borland, Argonne National Laboratory
9:30 - 9:55 Motivation for a range of ultrafast X-ray sources
Roger Falcone, Lawrence Berkeley National Laboratory
10:00 - 10:25 Ultrafast x-rays and applications in AMO science
Philip Bucksbaum, Stanford University
10:30 - 11:00 Discussion
11:00 - 11:10 Break
  Session 2 Chair: David Reis
11:15 - 11:40 Plasma physics with ultrafast x rays
Philip Heimann, Lawrence Berkeley National Laboratory
11:45 - 12:10 Materials science with ultrafast x rays
Robert Schoenlein, Lawrence Berkeley National Laboratory
12:15 - 12:45 Discussion
12:50 - 1:50 Lunch
  Session 3 Chair: Lin Chen
2:00 - 2:25 Rapid chemical and physical processes in solution
Edward Castner, Rutgers University
2:30 - 2:55 Control of photoinitiated reactions
Roseanne Sension, University of Michigan
3:00 - 3:30 Discussion
3:30 - 3:40 Break
Session 4 Chair: George Srajer
3:45 - 4:10 A quick look at magnetism using time-resolved soft-x-ray microscopy
Hendrik Ohldag SLAC
4:15 - 4:40 Scientific opportunities using a high-repetition rate, ultra-short pulse, hard x-ray source
Joel Brock, Cornell University
4:45 - 5:15 Discussion
5:30 Conclude