A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z  

Glock, H.-W.

Paper Title Page
WEPEC008 HOM Spectrum and Q-factor Estimations of the High-Beta CERN-SPL-Cavities 2905
 
  • H.-W. Glock, T. Galek, G. Pöplau, U. van Rienen
    Rostock University, Faculty of Computer Science and Electrical Engineering, Rostock
  
 

Beam energy deposited in Higher-Order-Modes may affect both beam stability and cryo power requirements of the planned CERN Superconducting Proton Linac SPL. We report on numerical studies of the high-beta cavity type, analyzing it's HOM spectrum. The most dangerous modes are identified and different possibilities of appropriate damping are discussed.

  
WEPEC052 Higher Order Modes in Third Harmonic Cavities for XFEL/FLASH 3007
 
  • I.R.R. Shinton, R.M. Jones, N. Juntong
    UMAN, Manchester
  • N. Baboi
    DESY, Hamburg
  • N. Eddy, T.N. Khabiboulline
    Fermilab, Batavia
  • T. Flisgen, H.-W. Glock, U. van Rienen
    Rostock University, Faculty of Computer Science and Electrical Engineering, Rostock
  
 

We analyse the higher order modes in the 3.9GHz bunch shaping cavities recently installed in the XFEL/FLASH facility at DESY. We report on recent experimental results on the frequency spectrum, both beam and probe based. These are compared to those predicted by finite element computer codes, globalised scattering matrix calculations and a two-band circuit model. This study is focused on the dipole component of the multiband expansion of the wakefield.