DISCUSSION OF THE OPTIMISATION OF A LINAC LATTICE TO MINIMISE DISRUPTION BY A CLASS OF PARASITIC MODES. / Molloy, Stephen; Ainsworth, Rob.

2012. Paper presented at LINAC12, Tel Aviv, Israel.

Research output: Contribution to conferencePaper

Published

Abstract

It is well known that each resonant mode in the RF
spectrum of multi-cell accelerating cavities will split into
a passband containing a number of modes, and that the
coupling of these modes to the beam is dependent on the
velocity of the accelerated particles. If these modes are
found to degrade the quality of the beam, it is possible to
take various measures to damp them, and thus keep their
effect below some critical threshold. In the case of the parasitic modes within the same passband as the fundamental
accelerating mode, their frequency is typically too close to
that of the fundamental to allow their power to be safely
extracted, and so cavity designers must rely on the natural
damping of the cavity itself. This note contains a theoretical discussion of the coupling of the beam to these passband modes for a large class of accelerating cavities, and
provides a mathematical model for use during the design
and optimisation of linacs.
Original languageEnglish
Publication statusPublished - 2012
EventLINAC12 - Tel Aviv, Israel
Duration: 9 Sep 201214 Sep 2012

Conference

ConferenceLINAC12
CountryIsrael
CityTel Aviv
Period9/09/1214/09/12

ID: 16571878