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@PHDTHESIS{Schwinkendorf:424631,
      author       = {Schwinkendorf, Jan-Patrick},
      othercontributors = {Osterhoff, Jens and Foster, Brian},
      title        = {{E}lectron-beam diagnostics for a laser-driven plasma
                      wakefield accelerator in the framework of {FLASHF}orward},
      school       = {Universität Hamburg},
      type         = {Dissertation},
      address      = {Hamburg},
      publisher    = {Verlag Deutsches Elektronen-Synchrotron},
      reportid     = {PUBDB-2019-03011, DESY-THESIS-2019-015},
      series       = {DESY-THESIS},
      pages        = {139},
      year         = {2019},
      note         = {no worldwide visibility(Schwinkendorf); Dissertation,
                      Universität Hamburg, 2018},
      abstract     = {Plasma wakefields are a promising approach for the
                      acceleration of electrons with ultrahigh (10 to 100 GV/m)
                      electric fields. Nowadays, high-intensity laser pulses are
                      routinely utilized to excite these large-amplitude plasma
                      waves. Particle beams from conventional radio-frequency
                      accelerators can also excite such waves and therefore may
                      work as an energy booster. In addition, this long-existing
                      technology is quite well understood such that the particle
                      beams can be operated as probes to gain an insight into the
                      plasma waves and the acceleration process within them. For
                      this purpose, among others, a new facility is being set up:
                      FLASHForward. Owing to the particle beam planned to drive
                      the plasma wakefield not being powerful enough to ionize the
                      applied gas and generate a plasma, a high-power laser is
                      available, which by itself is capable of driving plasma
                      waves. Thus, a laser-driven plasmawakefield accelerator
                      could be built and commissioned to support the operation of
                      FLASHForward as well as for stand-alone experiments. This
                      thesis reports on the implemented infrastructure, including
                      the laser and the accelerator with the appertaining
                      diagnostics, which can be used to prepare FLASHForward
                      covering target investigations, diagnostics or experiments.
                      Especially, this thesis is focused on diagnostics for the
                      electron beam. Since plasma accelerators can produce short
                      bunches to gain insight into the acceleration process as
                      well as allow a comparison of the beam quality with respect
                      to conventional acceleration their detection is of interest.
                      A basic detection method is the application of scintillating
                      screens. For the low charges which are typical of plasma
                      acceleration, a high-sensitivity phosphor screen was
                      investigated and calibrated. For longitudinal profiling
                      based on common spectroscopic investigations, a spectral
                      phase measurement technique is suggested to overcome
                      ambiguities based on the phase retrieval. The emittance is a
                      key parameter in accelerator science and a measure of the
                      beamquality important for particle physics as well as light
                      sources. Typically, the emittance is measured after the
                      plasma interaction where the plasma transition to the vacuum
                      might have affected it.Here, betatron radiation is accessed
                      to get an insightinto the emittance inside the plasma. Beams
                      both from self and ionization injection are compared, the
                      emitted betatron radiation is investigated and the
                      micron-level emittance deduced as well as related to
                      numerically analyzed PIC simulations.},
      cin          = {UNI/EXP / FLA / XFEL-User},
      cid          = {$I:(DE-H253)UNI_EXP-20120731$ / I:(DE-H253)FLA-20120731 /
                      I:(DE-H253)XFEL-User-20170713},
      pnm          = {631 - Accelerator R $\&$ D (POF3-631) / PWA - Research
                      group for plasma-based accelerators (PWA-20150304) /
                      VH-VI-503 - Plasma wakefield acceleration of highly
                      relativistic electrons with FLASH $(2015_IFV-VH-VI-503)$},
      pid          = {G:(DE-HGF)POF3-631 / G:(DE-H253)PWA-20150304 /
                      $G:(DE-HGF)2015_IFV-VH-VI-503$},
      experiment   = {EXP:(DE-H253)FLASHForward-20150101},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)29 / PUB:(DE-HGF)11},
      doi          = {10.3204/PUBDB-2019-03011},
      url          = {https://bib-pubdb1.desy.de/record/424631},
}