Author: Sax, C.
Paper Title Page
MOPAB294 Implementing Electro-Optical Diagnostics for Measuring the CSR Far-Field at KARA 931
 
  • C. Widmann, E. Bründermann, M. Caselle, S. Funkner, A.-S. Müller, M.J. Nasse, G. Niehues, M.M. Patil, C. Sax, J.L. Steinmann, M. Weber
    KIT, Karlsruhe, Germany
  • C. Mai
    DELTA, Dortmund, Germany
  
  Funding: This work was supported by BMBF ErUM-Pro project 05K19 STARTRAC, C.W. was funded under contract No. 05K19VDK, C.M. under contract No. 05K19PEC, S.F. under contract No. 05K16VKA.
For mea­sur­ing the tem­po­ral pro­file of the co­her­ent syn­chro­tron ra­di­a­tion (CSR) at the KIT stor­age ring KARA (Karl­sruhe Re­search Ac­cel­er­a­tor) an ex­per­i­men­tal setup based on elec­tro-op­ti­cal spec­tral de­cod­ing (EOSD) is cur­rently being im­ple­mented. The EOSD tech­nique al­lows sin­gle-shot, phase-sen­si­tive mea­sure­ments of the far-field ra­di­a­tion on a turn-by-turn basis at rates in the MHz range. There­fore, the re­sult­ing THz ra­di­a­tion from the dy­nam­ics of the bunch evo­lu­tion, e.g. the mi­crobunch­ing, can be ob­served with high tem­po­ral res­o­lu­tion. This far-field setup is part of the dis­trib­uted sen­sor net­work at KARA. Ad­di­tion­ally to the in­for­ma­tion ac­quired from the near-field EOSD spec­tral de­cod­ing and the hor­i­zon­tal bunch pro­file mon­i­tor, it en­ables to mon­i­tor the lon­gi­tu­di­nal phase-space of the bunch. In this con­tri­bu­tion, the char­ac­ter­i­za­tion of the far-field setup is sum­ma­rized and its im­ple­men­ta­tion is dis­cussed. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB294  
About • paper received ※ 19 May 2021       paper accepted ※ 07 June 2021       issue date ※ 18 August 2021  
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WEPAB289 Machine Learning Based Spatial Light Modulator Control for the Photoinjector Laser at FLUTE 3332
 
  • C. Xu, E. Bründermann, A.-S. Müller, M.J. Nasse, A. Santamaria Garcia, C. Sax, C. Widmann
    KIT, Karlsruhe, Germany
  • A. Eichler
    DESY, Hamburg, Germany
  
  Funding: C. Xu acknowledges the support by the DFG-funded Doctoral School "Karlsruhe School of Elementary and Astroparticle Physics: Science and Technology".
FLUTE (Fer­n­in­frarot Linac- und Test-Ex­per­i­ment) at KIT is a com­pact linac-based test fa­cil­ity for novel ac­cel­er­a­tor tech­nol­ogy and a source of in­tense THz ra­di­a­tion. FLUTE is de­signed to pro­vide a wide range of elec­tron bunch charges from the pC- to nC-range, high elec­tric fields up to 1.2 GV/m, and ul­tra-short THz pulses down to the fs-timescale. The elec­trons are gen­er­ated at the RF pho­toin­jec­tor, where the elec­tron gun is dri­ven by a com­mer­cial ti­ta­nium sap­phire laser. In this kind of setup the elec­tron beam prop­er­ties are de­ter­mined by the pho­toin­jec­tor, but more im­por­tantly by the char­ac­ter­is­tics of the laser pulses. Spa­tial light mod­u­la­tors can be used to trans­versely and lon­gi­tu­di­nally shape the laser pulse, of­fer­ing a flex­i­ble way to shape the laser beam and sub­se­quently the elec­tron beam, in­flu­enc­ing the pro­duced THz pulses. How­ever, non­lin­ear ef­fects in­her­ent to the laser ma­nip­u­la­tion (trans­porta­tion, com­pres­sion, third har­monic gen­er­a­tion) can dis­tort the orig­i­nal pulse. In this paper we pro­pose to use ma­chine learn­ing meth­ods to ma­nip­u­late the laser and elec­tron bunch, aim­ing to gen­er­ate tai­lor-made THz pulses. The method is demon­strated ex­per­i­men­tally in a test setup. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB289  
About • paper received ※ 19 May 2021       paper accepted ※ 06 July 2021       issue date ※ 26 August 2021  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)