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Working Group VI

New Ideas Employing High-Power Lasers

Group Leader:Dr. Wim Leemans
Lawrence Berkeley National Laboratory
Dept. of Accelerator & Fusion Research
1 Cyclotron Road
Berkeley, CA 94720 USA
Objective: To provide the "Future Light Source Community" information on:

  • Electron-Laser interaction based sources.
  • Plasma based radiation sources and accelerators.
  • Present and future high-power laser technology.
Working Group Activities: The working group will aim at identifying and evaluating laser based sources for radiation production, with projected performance characteristics that meet the needs determined by input from Group I. As a roadmap, each radiation source will be characterized through a discussion of its present day performance parameters (including planned experiments), and a discussion of an extrapolation path towards meeting the future light source needs. The following topics are suggested for discussion:

  1. Laser-electron beam interaction in linacs and storage rings:
    • Thomson/Compton scattering
    • Optical slicing
    • Optical stochastic cooling
  2. Plasma based laser driven accelerators:
    • Laser wakefield acceleration
    • External injection
    • All-optical injection
  3. Laser-Plasma based sources:
    • High harmonic generation in capillaries
    • X-ray generation from laser-solid interaction, capillary discharges, etc….
  4. Alternate concepts (i.e., those ideas that didn't show up in any of the other categories, but maybe should have)
Working Group Input/Output: Provide summary of state-of-the-art performance of high power lasers and identify technological challenges for future systems. Evaluation of laser system needs will be guided by radiation source requirements.

  1. Topics for discussion are:
    • Peak and average power, wavelength, pulse length, rep. rate, etc….
    • Solid state CPA systems, gas lasers, FELs
  2. Discussion on technological challenges will include:
    • Peak and average power: high repetition, high peak power systems
    • Synchronization with external rf sources

As a final goal, the working group will aim at summarizing the laser technology and laser-based radiation sources through tabulating present day performance and realistic extrapolation into the future. The group will also identify physics and technology challenges for future sources.

Schedule of Presentations to the Working Group: The working group is organized around the topics discussed in the Working Group Objectives. There are 8 speakers invited to give a summary of the "state-of-affairs" in (a) lasers, (b) laser/e-beam based sources, (c) laser/gas based radiation sources and (d) laser-plasma based radiation sources. Ample time is allocated for discussion on the material presented, as well as short presentations (10 min.) of planned or ongoing experiments/ideas. I have only received one abstract for a short presentation (A. Ting) so please send in an abstract if you would like to make a short presentation.

Tuesday, April 6:

15:00 - 15:15 Organization
15:15 - 15:45 T. Ditmire (LLNL)
15:45 - 16:15 I. Pogorelsky (BNL)
16:15 - 17:00 Discussion

Wednesday, April 7:

10:15 - 10:45: T. Cowan (LLNL)
10:45 - 11:15: R. Tatchyn (SLAC)
11:15 - 12:00: Discussion

13:00 - 13:30: S. Backus (Univ. of Michigan)
13:30 - 14:00: Discussion

15:00 - 16:00: Discussion and prepare progress report
16:00 - 18:00: Progress report

Thursday, April 8:

8:30 - 9:00: E. Esarey (LBNL)
9:00 - 9:30: D. Umstadter (Univ. of Michigan)
9:30 - 10:00: A. Ting (NRL)

10:30 - 12:00: Discussion

13:00 - 14:30: Discussion

15:00 - 17:00: Discussion and report preparation

Friday, April 9:

8:30 - 12:30: Working Group Reports

Information and Preparations Requested of Working Group Members:

Group members making presentations are requested to bring color copies and, if possible, electronic files of their presentation material for inclusion in the workshop proceedings.

Information Requested of Other Working Groups: From Working Group I:

  • Input on requirements for light sources to help defining the requirements and challenges for laser-based methods of radiation production.
From Working Group II:

  • Input on "conventional" linacs and on high power FELs.
From Working Group III:

  • Input on the impact of laser beams on storage rings.
Information Requested of This Working Group by Other Working Groups: Requested by Working Group III:

  • Please provide information on new detectors for understanding beam and light source dynamics.
List of Working Group Participants:
Hartmut BackeUniversitaet Mainz
Ali BelkacemLBNL
Nora BerrahLBNL
Zhonghou CaiANL
Thomas CowanLLNL
Todd DitmireLLNL
Eric EsareyLBNL
Katherine HarkayANL
Zhirong HuangANL
Chris JacobsenSUNY-Stony Brook
Michael KelleyJLAB
Shaukat KhanBESSY
Brian KincaidLBNL
Vladimir LitvinenkoDuke University
Niels MarquardtUniversity of Dortmund
Gerhard MaterlikDESY
Armon McPhersonANL
Pedro A. MontanoANL
Howard PadmoreLBNL
Igor PogoreskyBNL
Mike PooleCLRC Daresbury Lab
David QuimbySTI Optronics, Inc.
Shigemi SasakiBESSY
Roman TatchynSSRL
Tony TingNRL
Gil TravishANL
M. J. Van Der WielUniversity of Technology
Thomas WeisUniversitaet Dortmund
Ming XieLBNL
Yan YinYY Labs, Inc.
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