Author: Gonin, I.V.
Paper Title Page
WEPMR011 Simulations and Experimental Studies of Third Harmonic 3.9 Ghz CW Couplers for LCLS-II Project 2280
  • N. Solyak, I.V. Gonin, E.R. Harms, S. Kazakov, T.N. Khabiboulline, A. Lunin
    Fermilab, Batavia, Illinois, USA
  LCLS-II linac is based on SRF technology developed for the XFEL project. The XFEL 3rd harmonic system built by INFN is based on the original designs of cavity and power coupler developed and built by Fermilab for the FLASH facility at DESY. For LCLS-II application both designs of the 3.9 GHz cavity and the power coupler have been modified for an operation in the continuous wave regime up to 2 kW average RF power. In this paper we discuss coupler modifications and the result multiphysics analysis for various operating regimes. For the initial test of a proposed design, we decided to modify two spare warm sections of power couplers, built for the FLASH facility, by shortening both of two inner bellows and making a thicker copper plating. Modification of the existing coupler test stand and the test program are briefly discussed in this paper.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMR011  
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WEPMR013 Study of LCLS-II Fundamental Power Coupler Heating in HTS Integrated Cavity Tests 2286
  • N. Solyak, I.V. Gonin, A. Grassellino, C.J. Grimm, T.N. Khabiboulline, J.P. Ozelis, K. Premo, O.V. Prokofiev, D.A. Sergatskov, G. Wu
    Fermilab, Batavia, Illinois, USA
  LCLS-II coupler based on modified design of TTF3 coupler for higher average power was assembled on high Q cavity and tested at HTS as part of integrated cavity test program. Couplers were thermally connected to thermal shields and equipped with diagnostics to control temperature in different locations and provide information about cryogenic heat loads at 2 K, 5 K and 80 K.Three dressed cavities with power couplers were tested in HTS at full specified RF power. Results are summarized in this paper and cross-checked with simulation.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMR013  
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WEPMR014 RF Design of a High Average Beam-Power SRF Electron Source 2289
  • N. Sipahi, S. Biedron, S.V. Milton
    CSU, Fort Collins, Colorado, USA
  • I.V. Gonin, R.D. Kephart, T.N. Khabiboulline, V.P. Yakovlev
    Fermilab, Batavia, Illinois, USA
  There is a significant interest in developing high-average power electron sources, particularly in the area of electron sources integrated with Superconducting Radio Frequency (SRF) systems. For these systems, the electron gun and cathode parts are critical components for stable intensity and high-average powers. In this initial design study, we will present the design of a 9-cell accelerator cavity having a frequency of 1.3 GHz and the corresponding field optimization studies.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMR014  
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