Bochum 2009 – wissenschaftliches Programm
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HK: Fachverband Hadronen und Kerne
HK 31: Accelerators and Instrumentation II
HK 31.7: Vortrag
Dienstag, 17. März 2009, 15:45–16:00, H-ZO 90
Higher Order Modes in the Superconducting Cavities of the SPL — •Marcel Schuh1,2, Frank Gerigk1, and Carsten P. Welsch2,3 — 1CERN, Geneva, Switzerland — 2MPI-K, Heidelberg, Germany — 3University of Heidelberg, Germany
In this paper the influence of Higher Order Modes (HOM) on the operation of the superconducting linac section of the Superconducting Proton Linac (SPL), presently being designed at CERN for the LHC upgrade, is analysed. For this purpose, the characteristics of the HOMs in the 2 different beta families (0.65, 0.92 both at 704 MHz) of the SPL are calculated to estimate their effect on the cryogenic system and on the beam breakup (BBU). For both criteria the maximum external Q of the HOMs which can be accepted for reliable machine operation is defined. The results are then compared with values from similar projects. Finally, the need of HOM couplers for reliable operation of the SPL is discussed.