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Time domain analysis of higher order modes induced power dissipation in accelerating cavities

Costanza, Gabriele LU and Karlsson, Anders LU (2017) In Journal of Electromagnetic Waves and Applications 31(17). p.1843-1863
Abstract

We give a semi-analytical method for the calculation of the transient power and energy dissipated in the cavity walls of an accelerating structure due to the excitation of the higher order modes by a sequence of accelerating bunches. We treat the case where more than one bunch is present in the structure at the same time. The dissipated power is evaluated using the Lagrangian formalism and the dissipation function. Both the dissipated power from the transient fields, present when the bunch is inside the cavity, and from the time harmonic fields, present when the bunch has left the cavity, are included in the evaluations. This method is applied to the six-cell elliptic medium beta cavities for the LINAC of the European Spallation Source.... (More)

We give a semi-analytical method for the calculation of the transient power and energy dissipated in the cavity walls of an accelerating structure due to the excitation of the higher order modes by a sequence of accelerating bunches. We treat the case where more than one bunch is present in the structure at the same time. The dissipated power is evaluated using the Lagrangian formalism and the dissipation function. Both the dissipated power from the transient fields, present when the bunch is inside the cavity, and from the time harmonic fields, present when the bunch has left the cavity, are included in the evaluations. This method is applied to the six-cell elliptic medium beta cavities for the LINAC of the European Spallation Source. The simulations constitute a thorough test of the dissipated power of the design.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Elliptical cavity, higher order modes, LINAC
in
Journal of Electromagnetic Waves and Applications
volume
31
issue
17
pages
1843 - 1863
publisher
VSP BV
external identifiers
  • scopus:85027858337
  • wos:000413917000009
ISSN
0920-5071
DOI
10.1080/09205071.2017.1364174
language
English
LU publication?
yes
id
dbcead79-58c2-4d97-98c5-7b9288f9bc3e
date added to LUP
2017-09-07 08:34:53
date last changed
2018-02-18 23:48:05
@article{dbcead79-58c2-4d97-98c5-7b9288f9bc3e,
  abstract     = {<p>We give a semi-analytical method for the calculation of the transient power and energy dissipated in the cavity walls of an accelerating structure due to the excitation of the higher order modes by a sequence of accelerating bunches. We treat the case where more than one bunch is present in the structure at the same time. The dissipated power is evaluated using the Lagrangian formalism and the dissipation function. Both the dissipated power from the transient fields, present when the bunch is inside the cavity, and from the time harmonic fields, present when the bunch has left the cavity, are included in the evaluations. This method is applied to the six-cell elliptic medium beta cavities for the LINAC of the European Spallation Source. The simulations constitute a thorough test of the dissipated power of the design.</p>},
  author       = {Costanza, Gabriele and Karlsson, Anders},
  issn         = {0920-5071},
  keyword      = {Elliptical cavity,higher order modes,LINAC},
  language     = {eng},
  month        = {11},
  number       = {17},
  pages        = {1843--1863},
  publisher    = {VSP BV},
  series       = {Journal of Electromagnetic Waves and Applications},
  title        = {Time domain analysis of higher order modes induced power dissipation in accelerating cavities},
  url          = {http://dx.doi.org/10.1080/09205071.2017.1364174},
  volume       = {31},
  year         = {2017},
}