Application to FELs, Working Group C Report July 5, 2002

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Working Group C Report Application to
FELsHeinz-Dieter Nuhn, SLAC / SSRL

• BITHIA Room

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Working Group C Attendees

• Enrica Chiadroni
• Luca Giannessi
• Steve Lidia
• Vladimir Litvinenko
• Patrick Muggli
• Alex Murokh
• Heinz-Dieter Nuhn
• Sven Reiche
• Jamie Rosenzweig
• Claudio Pellegrini
• Susan Smith
• Matthew Thompson
• Alexander Varfolomeev
• others ...

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Tentative Working Group C Agenda BITHIA Room

• Tuesday, July 2, 2002
• 1700 1800 Sven Reiche, Where Do We Stand
  with Start-To-End Simulations ?
• 1800 1900 Alex Murokh, What Have We Learned
  from SASE Experiments ?
• 1900 1930 Luca Giannessi, PERSEO - A Tool
  For FEL Simulations with MATHCAD ?
• Wednesday, July 3, 2002
• 1115 1155 Vladimir Litvinenko,
  "Optics-Free" FEL Oscillators
• 1155 1230 Steve Lidia, ERL Based Ultra-Fast
  Synchrotron Rad. Facility Design
• Thursday, July 4, 2002
• 0830 1000 Jamie Rosenzweig, UCLA and Claudio
  Pellegrini, UCLA, VISA II
• 1000 1030 Joint Session with with Working
  Group D
• D. Umstadter et al.,Nonlinear Compton Scatt.
  X-Ray Source From Laser Driven E. Beams
• 1100 1230 Joint Session with with Working
  Group B
• S. Reiche, Comparison of the Coherent
  Radiation-Induced Micro-Bunching Inst.
• P. Emma, M. Cornacchia, Transverse to
  Longitudinal Emittance Exchange
• 1700 1930 Preparation of Working Group
  Summary

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Working Group Contribution

• Where Do We Stand with Start-To-End Simulations ?
• Sven Reiche
• Department of Astronomy and Physics, UCLA, Los
  Angeles, CA, USA

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Codes

• Drive Laser ?
• Gun Astra, Parmela
• Linac Elegant
• Bunch Compressor Traffic4, (Elegant)
• FEL Genesis 1.3, Ginger, Fast
• FEL Optics SRW, Phase, R. Bionta_at_LLNL, Shadow

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HDF
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Working Group Contribution

• What have we learned from SASE Experiments ?
• Alex Murokh
• Department of Astronomy and Physics, UCLA, Los
  Angeles, CA, USA

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Analysis of VISA Data

• Check 3D Scaling Laws
• Data Can only be analyzed fully through
  Simulation Codes
• More Detailed Measurement of Beam Parameters
  is Important for a Better Comparison with Theory

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3-D Scaling Laws
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Start-To-End Simulation Results
Start-to-end numerical model of VISA is strongly
supported by fine features of FEL radiation
reproduced in GENESIS
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Working Group Contribution

• PERSEO - A Tool For FEL Simulations with MATHCAD
  ?
• Luca Giannessi
• ENEA, Frascati, Rome, Italy

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Working Group Contribution

• "Optics-Free" FEL Oscillators
• Vladimir Litvinenko
• FEL Laboratory, Department of Physics, Duke
  University, Durham, NC, USA

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Working Group Contribution

• A Recirculating Linac Facility for Ultra-Fast
  X-Ray Science ?
• Steve Lidia
• Lawrence Berkeley National Laboratory, Berkeley,
  CA, USA

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Working Group Contribution

• VISA II
• Jamie Rosenzweig, Claudio Pellegrini
• Department of Astronomy and Physics, UCLA, Los
  Angeles, CA, USA

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VISA I VISA II

• VISA 1998 - 2001
• Funding stopped in Mid 2001
• VISA II Proposal 2002 (Collaboration
  UCLA-SLAC-Brookhaven-...)
• New Funding from ONR arrived!

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Physics Goals of VISA II

• Install bunch compressor in the ATF
• Mitigate severe non-linearity of bend beamline
• Diagnose beam completely at end of transport
• Study FEL with compressed beams
• Use FEL as diagnostic of compressor
• Study FEL with chirped, but uncompressed beams
• Impact LCLS schemes using chirping
• Study gain v. chirp
• Direct diagnosis of FEL longitudinal pulse
  characteristics