Author: Balzer, B.M.
Paper Title Page
WEOBB202 Ultra-fast Data Acquisition System for Coherent Synchrotron Radiation Based on Superconducting Terahertz Detectors 2094
 
  • C.M. Caselle, M. Hofherr, K.S. Ilin, V. Judin, A. Kopmann, A. Menshikov, A.-S. Müller, M. Siegel, N.J. Smale, P. Thoma, M. Weber, S. Wuensch
    KIT, Eggenstein-Leopoldshafen, Germany
  • B.M. Balzer, S. Cilingaryan
    Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
  
  The ANKA syn­chro­tron ra­di­a­tion source lo­cated at the Karl­sruhe In­sti­tute of Tech­nol­ogy in Ger­many op­er­ates in the en­ergy range be­tween 0.5-2.5GeV and pro­vides co­her­ent syn­chro­tron ra­di­a­tion. To re­solve the ul­tra-short ter­a­hertz pulses emit­ted by a sin­gle bunch, thin YBCO su­per­con­duct­ing film de­tec­tors have been de­vel­oped. A re­sponse time of 45ps was de­ter­mined as the FWHM at the out­put of the ana­log am­pli­fier. A novel and high ac­cu­racy data ac­qui­si­tion ar­chi­tec­ture for sam­pling of the in­di­vid­ual ul­tra-short ter­a­hertz pulses com­bined with real-time data pro­cess­ing based on GPUs for co­her­ent syn­chro­tron ra­di­a­tion is pre­sented. The dig­i­tizer board is a made-in-house board de­signed for sam­pling of the fast pulse sig­nals with pulse width be­tween few tens of pi­cosec­ond until 100ps. For each ter­a­hertz pulse five sam­ples are ac­quired with a min­i­mum sam­pling time of 3ps. A pro­to­type setup with ter­a­hertz YBCO de­tec­tors, dig­i­tizer boards and the high-through­put FPGA frame­work has been suc­cess­fully de­vel­oped and tested at ANKA. The overview of the ex­per­i­men­tal setup in­clud­ing the YBCO de­tec­tor tech­nol­ogy and the pre­lim­i­nary re­sults with sin­gle and multi-bunch fill­ing pat­tern will be dis­cussed.  
slides icon Slides WEOBB202 [2.416 MB]  
 
MOPEA019 Studies of Bunch-bunch Interactions in the ANKA Storage Ring with Coherent Synchrotron Radiation using an Ultra-fast Terahertz Detection System 109
 
  • A.-S. Müller, B.M. Balzer, C.M. Caselle, N. Hiller, M. Hofherr, K.S. Ilin, V. Judin, B. Kehrer, S. Marsching, S. Naknaimueang, M.J. Nasse, J. Raasch, A. Scheuring, M. Schuh, M. Schwarz, M. Siegel, N.J. Smale, J.L. Steinmann, P. Thoma, M. Weber, S. Wuensch
    KIT, Karlsruhe, Germany
  
  Funding: Supported by Initiative and Networking Fund of the Helmholtz Association under contract No. VH-NG-320 and German Federal Ministry of Education and Research under Grant. Noss. 05K10VKC and 05K2010VKD
In the low-al­pha op­er­a­tion mode of the ANKA syn­chro­tron light source, co­her­ent syn­chro­tron ra­di­a­tion (CSR) is emit­ted from short elec­tron bunches. De­pend­ing on the bunch cur­rent, the ra­di­a­tion shows bursts of high in­ten­sity. These bursts of high in­ten­sity THz ra­di­a­tion dis­play a time evo­lu­tion which can be ob­served only on long time scales with re­spect to the rev­o­lu­tion pe­riod. In ad­di­tion, long range wake fields can in­tro­duce a cor­re­la­tion be­tween the bunches within a bunch train and thus mod­ify the ob­served be­hav­ior. A novel de­tec­tion sys­tem con­sist­ing of an ul­tra-fast su­per­con­duct­ing THz de­tec­tor and data ac­qui­si­tion sys­tem was used to in­ves­ti­gate cor­re­la­tions vis­i­ble on the burst­ing pat­tern and to study the in­ter­ac­tions of very short pulses in the ANKA stor­age ring.