Author: Kimura, S.I.
Paper Title Page
THP079
 Observation of Laser-Sliced Electron Bunch using a YBCO Detector at UVSOR-III  
 
  • E. Roussel, S. Bielawski, C. Evain, C. Szwaj
    PhLAM/CERCLA, Villeneuve d'Ascq Cedex, France
  • M. Adachi, M. Katoh, S.I. Kimura, T. Konomi
    UVSOR, Okazaki, Japan
  • M. Hosaka, Y. Takashima, N. Yamamoto
    Nagoya University, Nagoya, Japan
  • K.S. Ilin, J. Raasch, A. Scheuring, M. Siegel, P. Thoma
    KIT, Karlsruhe, Germany
  • H. Zen
    Kyoto University, Kyoto, Japan
  
  When the cur­rent of a stor­age ring is near the mi­crobunch­ing in­sta­bil­ity thresh­old, a strong burst of CSR in­sta­bil­ity may be seeded by an ex­ter­nal laser pulse*. Here we pre­sent real time record­ings of the co­her­ent syn­chro­tron ra­da­tion (CSR) pulse shapes emit­ted by sliced elec­tron bunch using a new tech­nol­ogy based on YBCO thin film de­tec­tor com­bined with the state-of-the-art os­cil­lo­scope. This al­lows to make mea­sure­ments in real time of the sliced elec­tron bunch dy­nam­ics over sev­eral turns. These ex­per­i­men­tal ob­ser­va­tions open a new way to make se­vere com­par­isons with ex­ist­ing and fu­ture mod­els of the mi­crobunch­ing in­sta­bil­ity. Tests of a Vlasov-Fokker-Planck model are pre­sented.
* Byrd et al. Phys. Rev. Lett. 97, 074802 (2006)