Author: Zholents, A.
Paper Title Page
THP073 Status Update for the High Gain High Efficiency TESSA-266 Experiment 730
  • Y. Park, D.K. Dang, P.E. Denham, P. Musumeci, N.S. Sudar
    UCLA, Los Angeles, USA
  • R.B. Agustsson, T.J. Campese, I.I. Gadjev, A.Y. Murokh
    RadiaBeam, Marina del Rey, California, USA
  • C.C. Hall, S.D. Webb
    RadiaSoft LLC, Boulder, Colorado, USA
  • Y. Sun, A. Zholents
    ANL, Lemont, Illinois, USA
  Funding: DOE grant No. DE-SC0009914 and DE-SC0018559
Tapering Enhanced Stimulated Superradiant Amplification (TESSA) allows to increase the efficiency of Free Electron Laser (FEL) based radiation generation from ~0.1% to 10% by using intense seed laser pulses, strongly tapered undulators and prebunched electron beams [1]. Initial results validating this method have already been obtained at 10 µm wavelength at Brookhaven National Laboratory [2]. We will present the design of an experiment to demonstrate the TESSA scheme at high gain and shorter wavelength (266 nm) using the APS injector linac at Argonne National Labor-atory (ANL) to obtain conversion efficiency of up to 10%. Undulator and focusing lattice design, as well as beam dynamics and diagnostics for this experiment will be discussed. An extension of the experiment to include the possibility of multi-bunch linac operation and an optical cavity around the undulator to operate in the TESSO regime will also be presented [3].
[1] J. Duris et al., New J. Phys. 17 063036 (2015)
[2] N Sudar et al., Physical review letters, 117, 174801 (2016)
[3] J. Duris et al., Physical Review Accelerators and Beams 21, 080705 (2018)
DOI • reference for this paper ※  
About • paper received ※ 20 August 2019       paper accepted ※ 29 August 2019       issue date ※ 05 November 2019  
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Attosecond Pulses from Enhanced SASE at LCLS  
  • A. Marinelli, P.H. Bucksbaum, E. Champenois, J. Cryan, T.D.C. Driver, J.P. Duris, Z. Huang, A.A. Lutman, J.P. MacArthur, Z. Zhang
    SLAC, Menlo Park, California, USA
  • Z. Huang, S. Li, J.P. MacArthur
    Stanford University, Stanford, California, USA
  • M. Kling, P. Rosenberger
    LMU, Garching, Germany
  • A. Zholents
    ANL, Lemont, Illinois, USA
  In my talk I will report the generation and diagnostic of GW-scale soft X-ray attosecond pulses with a current-enhanced X-ray free-electron laser. Our method is based on the enhaced SASE scheme, where an electron bunch with high-current spike is generated by the interaction of the relativistic electrons with a high-power infrared pulse. The X-ray pulses generated by the compressed electron beam are diagnosed with angular photoelectron streaking, and have a mean pulse duration of 350 attoseconds. Our source has a peak brightness that is 6 orders of magnitude larger than any other source of isolated attosecond pulses in the soft X-ray spectral region. This unique combination of high intensity, high photon energy and pulse duration enables the investigation of valence electron dynamics with non-linear spectroscopy and single-shot imaging. I will also discuss the generation of two-color attosecond pulses and our future plans for attosecond science at LCLS-II.  
slides icon Slides THD02 [0.260 MB]  
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