Beam coupling impedances of obstacles protruding into beam pipe

Author

Kurennoy, Sergey S.

Author_Institution

LANSCE-1, Los Alamos Nat. Lab., NM, USA

Volume

2

fYear

1997

fDate

12-16 May 1997

Firstpage

1732

Abstract

The beam coupling impedances of small obstacles protruding inside the vacuum chamber of an accelerator are calculated analytically at frequencies for which the wavelength is large compared to a typical size of the obstacle. Simple formulas for a few important particular cases, including both essentially three-dimensional objects like a post or a mask and axisymmetric irises, are presented. The analytical results are compared and agree with three-dimensional computer simulations. These results allow simple practical estimates of the broad-band impedance contributions from such discontinuities

Keywords

beam handling techniques; high energy physics instrumentation computing; particle accelerators; vacuum apparatus; 3D computer simulations; axisymmetric irises; beam coupling impedances; beam pipe; broad-band impedance contributions; discontinuities; mask; particle accelerator; post; protruding obstacles; small obstacles; vacuum chamber; Computer simulation; Frequency; Impedance; Laboratories; Large Hadron Collider; Magnetic moments; Optical coupling; Particle beams; Polarization; Waveguide discontinuities;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1997. Proceedings of the 1997

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-4376-X

Type

conf

DOI

10.1109/PAC.1997.750819

Filename

750819