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@PHDTHESIS{Farace:625675,
      author       = {Farace, Bonaventura},
      othercontributors = {Leemans, Wim},
      title        = {{D}evelopment of high-average-power laser plasma
                      accelerators driven by industrial {Y}b lasers},
      school       = {University of Hamburg},
      type         = {Dissertation},
      reportid     = {PUBDB-2025-01174},
      pages        = {160},
      year         = {2024},
      note         = {Dissertation, University of Hamburg, 2024},
      abstract     = {Over the past two decades, laser plasma accelerators (LPAs)
                      have emerged as a groundbreakingtechnology with immense
                      potential for electron acceleration. Their ability to
                      sustainexceptionally high accelerating gradients, on the
                      order of 100 GV/m, and provide electronbunches with only few
                      femtoseconds duration, promises a compact, cost-effective
                      solutionfor numerous industrial, commercial, and medical
                      applications. Yet, to transitionfrom experimental setups to
                      practical applications, it is crucial to enhance their
                      robustness,reliability, and repetition rate. In this
                      context, industrial-quality
                      Ytterbium:Yttriumaluminium-garnet (Yb:YAG) lasers present an
                      ideal, economically-efficient option, thanksto their
                      inherently small quantum defect, high slope efficiency and
                      high average power.This thesis explores the feasibility of
                      using industrial Yb:YAG lasers as drivers for
                      plasmaaccelerators. Typically, these lasers deliver pulses
                      of relatively long duration, extending tothe
                      picosecond-level. However, to excite a plasma wave,
                      femtosecond durations are usuallyrequired. Hence, the
                      temporal compression of the laser output to a few optical
                      cycles is thefirst critical aspect under analysis. To
                      address this challenge, an efficient double
                      multi-passcell(MPC) post-compression scheme is employed,
                      achieving the highest-ever compressionfactor to date for a
                      10 mJ-level pulse.In addition to the driver laser, the
                      plasma source plays a key role in the laser-plasma
                      interaction,shaping the plasma density profile. Therefore,
                      an extensive analysis of the mostcommon sources for
                      high-average-power LPA is presented. To overcome the
                      limitationsusually faced, a novel microfluidic source is
                      proposed with unique capabilities for precisetailoring of
                      the plasma profile along the laser axis, at the μm level.
                      Its exceptional finetuningability is demonstrated through a
                      pioneering Bayesian optimisation tool, combiningfluid
                      dynamics and particle-in-cell simulations. This novel
                      optimisation approach holdsthe promise to significantly
                      boost the performances of LPA, particularly in
                      applicationorientedscenarios.Finally, the post-compressed
                      laser output is used to demonstrate, for the first time,
                      aplasma wakefield driven by an industrial Yb:YAGlaser. The
                      laser-plasma interaction is thoroughlyanalysed and a clear
                      path towards the first industrial-laser-drivem electron
                      accelerationis presented.},
      cin          = {MPL},
      cid          = {I:(DE-H253)MPL-20120731},
      pnm          = {621 - Accelerator Research and Development (POF4-621) /
                      PHGS, VH-GS-500 - PIER Helmholtz Graduate School
                      $(2015_IFV-VH-GS-500)$},
      pid          = {G:(DE-HGF)POF4-621 / $G:(DE-HGF)2015_IFV-VH-GS-500$},
      experiment   = {EXP:(DE-H253)PLASMA-20250101},
      typ          = {PUB:(DE-HGF)11},
      urn          = {urn:nbn:de:gbv:18-ediss-120921},
      doi          = {10.3204/PUBDB-2025-01174},
      url          = {https://bib-pubdb1.desy.de/record/625675},
}