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@INPROCEEDINGS{Eichner:453469,
      author       = {Eichner, Timo and Hülsenbusch, T. and Braun, Cora Sophia
                      Lara and Hübner, L. and Jalas, S. and Kirchen, M. and Lang,
                      T. and Le, T. and Leroux, V. and Messner, P. and Schnepp, M.
                      and Trunk, Maximilian and Winkelmann, L. and Winkler, P. and
                      Hartl, I. and Maier, Andreas},
      title        = {{S}tability {D}emands for {L}aser-systems in {P}lasma
                      {A}cceleration},
      reportid     = {PUBDB-2020-05270},
      year         = {2019},
      abstract     = {The LUX laser-plasma-accelerator [1], built in close
                      collaboration of the University of Hamburg and DESY,
                      isdesigned to provide plasma electron beams with enhanced
                      stability as a driver for future compact light sources.After
                      significant in-house development of the driving 200 TW ANGUS
                      laser system, the laser has reached anoperational stability,
                      that enables us to repeatedly demonstrate day-long operation
                      of the laser-plasma acceleratorwith several 10k consecutive
                      electron beams and high availability. The electron beam
                      quality is sufficient to drivea miniature undulator,
                      generating synchrotron-type undulator radiation at
                      wavelengths well below 9 nm.We report on experimental
                      results of the long-term stability of the ANGUS laser system
                      with sub $2\%$ energystability over a full day, and pulse
                      duration stability on the $1\%$ level, that have been
                      enabled through activefeedback loops at various stages
                      within the amplification chain. Coupled with a comprehensive
                      diagnostics andcontrol system, that contributes to
                      operational necessities such as short daily startup times
                      and optimizedmaintenance procedures, the system has enabled
                      us to gather statistical data of the accelerator
                      performance, whichis a crucial step for the accelerator
                      community.These day-long experimental campaigns have
                      indicated, that the stability of the accelerator performance
                      islimited by both fast fluctuations and slow drifts, of the
                      spectral and spatial properties of the laser pulses.
                      Theselimitations are inherent to the complex amplification
                      chains and system architecture of most PW class
                      lasersystems, with long beam-paths and numerous optical
                      components, that each contribute to the degradation of
                      laserstability [2]. To further enhance the capabilities of
                      laser-based plasma accelerators it is therefore crucial
                      toovercome these inherent challenges of the technology and
                      to investigate new approaches combining high gain andthe
                      passive stability. We are therefore investigating
                      OPCPA-based pulses as seeds for our main amplification
                      chainin order to generate ultrafast laser pulses tailored
                      for stable long-term plasma accelerator operation as the
                      primaryfocus.In this contribution we will discuss the strict
                      stability demands of laser systems for laser-plasma
                      particleacceleration with the example of the performance of
                      the 200TW ANGUS laser system. Besides reviewing thecurrent
                      capabilities of the laser and their influence on the
                      accelerator, we will suggest new approaches forovercoming
                      the inherent limitations of Ti:Sapphire technology, with a
                      focus on the potential capabilities of whitelight seeded
                      optical parametric amplifiers driven by highly reliable
                      industrial femtosecond pump lasers.[1] N. Delbos, C. Werle,
                      I. Dornmair, T. Eichner, L. Hübner, S. Jalas, S. W. Jolly,
                      M. Kirchen, V. Leroux, P. Messner, M. Schnepp, M. Trunk,
                      P.A. Walker, P. Winkler, A. R. Maier, "LUX -- A Laser-Plasma
                      Driven Undulator Beamline", Nucl. Instr. Meth. Phys. Res. A
                      909, 318 (2018)[2] V. Leroux, S. Jolly, M. Schnepp, T.
                      Eichner, S. Jalas, M. Kirchen, P. Messner, C. Werle, P.
                      Winkler, and A. Maier, "Wavefront degradationof a 200 TW
                      laser from heat-induced deformation of in-vacuum compressor
                      gratings", Opt. Express 26, 13061-13071 (2018)},
      month         = {Sep},
      date          = {2019-09-29},
      organization  = {Advanced Solid State Lasers, Vienna
                       (Austria), 29 Sep 2019 - 3 Oct 2019},
      cin          = {CFEL-LUX / FS-LA},
      cid          = {I:(DE-H253)CFEL-LUX-20160909 / I:(DE-H253)FS-LA-20130416},
      pnm          = {631 - Accelerator R $\&$ D (POF3-631)},
      pid          = {G:(DE-HGF)POF3-631},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://bib-pubdb1.desy.de/record/453469},
}