Analysis of HOM interaction between cavities by multi-modal s-parameter measurements

  • Accelerating cavities exchange HOM power through interconnecting beam pipes in case of signal frequencies above the cut-off of their propagating waveguide modes. This may lead either to improved HOM damping or - in the case most severe - to unwanted phase coherence of fields to the beam. Therefore the knowledge of the scattering properties of a cavity as a line element is needed to analyse all kinds of RF cavity-cavity interaction. Since there is a lack of measurement tools capable to provide a multidimensional scattering matrix at a given frequency point, we have been developing a method for this purpose. It uses a set of 2-port S-parameters of the device under test, embedded in a number of geometrically different RF environments. The application of the method is demonstrated with copper models of TESLA cavities.

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Author:Hans-Walter GlockORCiDGND, F. Marhauser, Peter HülsmannGND, Horst Klein
Parent Title (German):Proceedings of the Particle Accelerator Conference, Vancouver (Kanada), 12.05. - 16.05.1997
Document Type:Article
Date of Publication (online):2005/11/10
Year of first Publication:1998
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/11/10
Page Number:3
First Page:521
Last Page:523
Source:Proceedings of the Particle Accelerator Conference, Vancouver (Kanada), 12.05. - 16.05.1997, (c) 1998 IEEE
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht