Author: Floettmann, K.     [Flöttmann, K.]
Paper Title Page
MOPMB015 Technical Design Considerations About the SINBAD-ARES Linac 112
  • B. Marchetti, R.W. Aßmann, U. Dorda, K. Flöttmann, M. Hachmann, I. Hartl, J. Herrmann, M. Hüning, G. Kube, F. Ludwig, F. Mayet, M. Pelzer, I. Peperkorn, S. Pfeiffer, H. Schlarb, M. Titberidze, G. Vashchenko, M.K. Weikum, L. Winkelmann, K. Wittenburg, J. Zhu
    DESY, Hamburg, Germany
  • R. Rossmanith
    KIT, Karlsruhe, Germany
  The SINBAD facility (Short and INnovative Bunches and Accelerators at Desy) is foreseen to host various experiments in the field of production of ultra-short electron bunches and novel high gradient acceleration technique. The SINBAD linac, also called ARES (Accelerator Research experiment at SINBAD), will be a conventional S-band linear RF accelerator allowing the production of low charge (0.5 pC - few pC) ultra-short electron bunches (FWHM, length <= 1 fs - few fs) having 100 MeV energy. In this paper we present the current status of the technical design considerations, motivate the foreseen diagnostics for the RF gun commissioning and present examples of foreseen applications.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB015  
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MOPMW003 Thermal Simulation of an Energy Feedback Normal Conducting RF Cavity 396
  • M. Fakhari, K. Flöttmann, S. Pfeiffer, H. Schlarb
    DESY, Hamburg, Germany
  • J. Roßbach
    University of Hamburg, Institut für Experimentalphysik, Hamburg, Germany
  • A. Yahaghi
    CFEL, Hamburg, Germany
  Thermal simulation has been performed for an energy feedback normal conducting RF cavity. The cavity is going to be used as a fast actuator to regulate the arrival time of the electron bunches in fs level in FLASH. By measuring the arrival time jitter of one bunch in a bunch train, the designed cavity apply a correcting accelerating or decelerating voltage to the next bunches. The input power of the cavity is provided by a solid state amplifier and will be coupled to the cavity via a loop on the body. To achieve the fs level precision of the arrival time, the cavity should be able to provide accurate accelerating voltage with a precision of 300 eV. We performed thermal simulation to find out the temperature distribution of the cavity and make sure that heating will not affect its voltage precision. The simulation results show that by using two input loops the coupling constant will vary from 4.11 to 4.13 during the operation of the cavity which effect on the bunchs' arrival time would be less than 0.25 fs. While using just one input loop can lead to an error of about 1 fs.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMW003  
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