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@INPROCEEDINGS{Kruppa:224042,
      author       = {Kruppa, K. and Pfeiffer, Sven and Lichtenberg, G. and
                      Brinker, Frank and Decking, Winfried and Floettmann, Klaus
                      and Krebs, Olaf and Schlarb, Holger and Schreiber,
                      Siegfried},
      title        = {{H}igh {P}recision {T}emperature {C}ontrol of
                      {N}ormal-{C}onducting {RF} {GUN} for a {H}igh {D}uty {C}ycle
                      {F}ree-{E}lectron {L}aser},
      reportid     = {PUBDB-2015-03408},
      year         = {2015},
      note         = {data released under the ODC-BY 1.0 license},
      abstract     = {High precision temperature control of the RF GUN is
                      necessary to optimally accelerate thousands of electrons
                      within the injection part of the European X-ray
                      free-electron laser XFEL and the Free Electron Laser FLASH.
                      A difference of the RF GUN temperature from the reference
                      value of only 0.01 K leads to detuning of the cavity and
                      thus limits the performance of the whole facility.
                      Especially in steady-state operation there are some
                      undesired temperature oscillations when using classical
                      standard control techniques like PID control. That is why a
                      model based approach is applied here to design the RF GUN
                      temperature controller for the free-electron lasers. A
                      thermal model of the RF GUN and the cooling facility is
                      derived based on heat balances, considering the heat
                      dissipation of the Low-Level RF power. This results in a
                      nonlinear model of the plant. The parameters are identified
                      by fitting the model to data of temperature, pressure and
                      control signal measurements of the FLASH facility, a pilot
                      test facility for the European XFEL. The derived model is
                      used for controller design. A linear model predictive
                      controller was implemented in MATLAB/Simulink and tuned to
                      stabilize the temperature of the RF GUN in steady-state
                      operation. A test of the controller in simulation shows
                      promising results.},
      month         = {Jul},
      date          = {2015-07-21},
      organization  = {5th International Conference on
                       Simulation and Modeling Methodologies,
                       Technologies and Applications, Colmar
                       (France), 21 Jul 2015 - 23 Jul 2015},
      cin          = {MSK / MKK4 / MFL / MPY / MIN},
      cid          = {I:(DE-H253)MSK-20120731 / I:(DE-H253)MKK4-20210408 /
                      I:(DE-H253)MFL-20120731 / I:(DE-H253)MPY-20120731 /
                      I:(DE-H253)MIN-20120731},
      pnm          = {631 - Accelerator R $\&$ D (POF3-631) / 6G13 - XFEL
                      (POF3-622)},
      pid          = {G:(DE-HGF)POF3-631 / G:(DE-HGF)POF3-6G13},
      experiment   = {EXP:(DE-H253)XFEL(machine)-20150101},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://bib-pubdb1.desy.de/record/224042},
}