Measurement of nonlinear observables in the Large Hadron Collider using kicked beams
The nonlinear dynamics of a circular accelerator such as the Large Hadron Collider (LHC) may significantly impact its performance. As the LHC progresses to more challenging regimes of operation it is to be expected that the nonlinear single particle dynamics in the transverse planes will play an inc...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
American Physical Society
2014-08-01
|
Series: | Physical Review Special Topics. Accelerators and Beams |
Online Access: | http://doi.org/10.1103/PhysRevSTAB.17.081002 |
id |
doaj-5a1a5c00de304205bafbc9b14f4ca326 |
---|---|
record_format |
Article |
spelling |
doaj-5a1a5c00de304205bafbc9b14f4ca3262020-11-24T21:26:25ZengAmerican Physical SocietyPhysical Review Special Topics. Accelerators and Beams1098-44022014-08-0117808100210.1103/PhysRevSTAB.17.081002Measurement of nonlinear observables in the Large Hadron Collider using kicked beamsE. H. MacleanR. TomásF. SchmidtT. H. B. PerssonThe nonlinear dynamics of a circular accelerator such as the Large Hadron Collider (LHC) may significantly impact its performance. As the LHC progresses to more challenging regimes of operation it is to be expected that the nonlinear single particle dynamics in the transverse planes will play an increasing role in limiting the reach of the accelerator. As such it is vital that the nonlinear sources are well understood. The nonlinear fields of a circular accelerator may be probed through measurement of the amplitude detuning: the variation of tune with single particle emittance. This quantity may be assessed experimentally by exciting the beam to large amplitudes with kicks, and obtaining the tunes and actions from turn-by-turn data at Beam Position Monitors. The large amplitude excitations inherent to such a measurement also facilitate measurement of the dynamic aperture from an analysis of beam losses following the kicks. In 2012 these measurements were performed on the LHC Beam 2 at injection energy (450 GeV) with the nominal magnetic configuration. Nonlinear coupling was also observed. A second set of measurements were performed following the application of corrections for b_{4} and b_{5} errors. Analysis of the experimental results, and a comparison to simulation are presented herein.http://doi.org/10.1103/PhysRevSTAB.17.081002 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
E. H. Maclean R. Tomás F. Schmidt T. H. B. Persson |
spellingShingle |
E. H. Maclean R. Tomás F. Schmidt T. H. B. Persson Measurement of nonlinear observables in the Large Hadron Collider using kicked beams Physical Review Special Topics. Accelerators and Beams |
author_facet |
E. H. Maclean R. Tomás F. Schmidt T. H. B. Persson |
author_sort |
E. H. Maclean |
title |
Measurement of nonlinear observables in the Large Hadron Collider using kicked beams |
title_short |
Measurement of nonlinear observables in the Large Hadron Collider using kicked beams |
title_full |
Measurement of nonlinear observables in the Large Hadron Collider using kicked beams |
title_fullStr |
Measurement of nonlinear observables in the Large Hadron Collider using kicked beams |
title_full_unstemmed |
Measurement of nonlinear observables in the Large Hadron Collider using kicked beams |
title_sort |
measurement of nonlinear observables in the large hadron collider using kicked beams |
publisher |
American Physical Society |
series |
Physical Review Special Topics. Accelerators and Beams |
issn |
1098-4402 |
publishDate |
2014-08-01 |
description |
The nonlinear dynamics of a circular accelerator such as the Large Hadron Collider (LHC) may significantly impact its performance. As the LHC progresses to more challenging regimes of operation it is to be expected that the nonlinear single particle dynamics in the transverse planes will play an increasing role in limiting the reach of the accelerator. As such it is vital that the nonlinear sources are well understood. The nonlinear fields of a circular accelerator may be probed through measurement of the amplitude detuning: the variation of tune with single particle emittance. This quantity may be assessed experimentally by exciting the beam to large amplitudes with kicks, and obtaining the tunes and actions from turn-by-turn data at Beam Position Monitors. The large amplitude excitations inherent to such a measurement also facilitate measurement of the dynamic aperture from an analysis of beam losses following the kicks. In 2012 these measurements were performed on the LHC Beam 2 at injection energy (450 GeV) with the nominal magnetic configuration. Nonlinear coupling was also observed. A second set of measurements were performed following the application of corrections for b_{4} and b_{5} errors. Analysis of the experimental results, and a comparison to simulation are presented herein. |
url |
http://doi.org/10.1103/PhysRevSTAB.17.081002 |
work_keys_str_mv |
AT ehmaclean measurementofnonlinearobservablesinthelargehadroncolliderusingkickedbeams AT rtomas measurementofnonlinearobservablesinthelargehadroncolliderusingkickedbeams AT fschmidt measurementofnonlinearobservablesinthelargehadroncolliderusingkickedbeams AT thbpersson measurementofnonlinearobservablesinthelargehadroncolliderusingkickedbeams |
_version_ |
1725979973866487808 |