TOPB  —  Light Sources and Free Electron Lasers   (17-May-05   13:50—15:30)

Chair: L. Merminga, Jefferson Lab, Newport News, Virginia

Paper Title Page
TOPB001 Methods of Attosecond X-Ray Pulse Generation 39
  • A. Zholents
    LBNL, Berkeley, California
  Funding: This work was supported by the Director, Office of Science of the U. S. Department of Energy under Contract No. DE-AC03-76SF00098.

Our attitude towards attosecond x-ray pulses has changed dramatically over the past several years. Not long ago x-ray pulses with a duration of a few hundred attoseconds were just science fiction for most of us, but they are already a tool for some researchers in present days. Breakthrough progress in the generation of solitary soft x-ray pulses of attosecond duration has been made by the laser community. Following this lead, people in the free electron laser community have begun to develop new ideas on how to generate attosecond x-ray pulses in the hard x-ray energy range. In this report I will review some of these ideas.

TOPB002 Sub-Picosecond Pulse Source: Recent Results
  • J.B. Hastings
    SLAC, Menlo Park, California
  The Sub-Picosecond Pulse Source (SPPS)at SLAC is a unique photon source produced from 80 femtosecond electron bunches with 3 nC of charge. At 28 GeV they produce spontaneous synchrotron radiaiton with unprecedented peak brightness. This source provides a window into the science and technology of ultra-fast x-ray studies that x-ray free electron lasers will permit. Recent results from the SPPS in both x-ray science and technology will be discussed, in particular the methods and results for pump-probe studies of laser-solid interactions.  
TOPB003 Progress in Large-Scale Femtosecond Timing Distribution and RF-Synchronization 284
  • F.X. Kaertner, H. Byun, J. Chen, F J. Grawert, F.O. Ilday, J. Kim, A. Winter
    MIT, Cambridge, Massachusetts
  For future advances in accelerator physics in general and seeding of free electron lasers (FELs) in particular, precise synchronization between low-level RF-system, photo-injector laser, seed radiation as well as potential probe lasers at the FEL output is required. We propose a modular system based on optical pulse trains from mode-locked lasers for timing distribution and timing information transfer in the optical domain to avoid detrimental effects due to amplitude to phase conversion in photo detectors. Synchronization of various RF- and optical sub-systems with femtosecond precision over distances of several hundred meters can be achieved. First experimental results and limitations of the proposed scheme for timing distribution are discussed.  
TOPB004 Overview of Energy Recovery Linacs 382
  • I.V. Bazarov
    Cornell University, Department of Physics, Ithaca, New York
  Funding: Supported by the NSF.

Existing Energy Recovery Linacs (ERLs) are successfully operated as kW-class average power infrared Free Electron Lasers (FELs). Various groups worldwide actively pursue ERLs as a technology of choice for a number of new applications. These include high brilliance light sources in a wide range of photon energies utilizing both spontaneous and FEL radiation production techniques, electron cooling of ion beams, and ERL-based electron-ion collider. All of these projects seek in various ways to extend performance parameters possible in ERLs beyond what has been achieved in existing relatively small scale demonstration facilities. The demand is for much higher average currents, significantly larger recirculated beam energies and powers and substantially improved electron sources. An overview of the ongoing ERL projects will be presented along with the summary of the progress that is being made in addressing the outstanding issues in this type of accelerators.