Electron Cloud and Beam Scrubbing in the LHC

Mostrar otras versiones (1)

An adequate dose of photoelectrons, accelerated by low-intensity proton bunches and hitting the LHC beam screen wall, will substantially reduce secondary emission and avoid the fast build-up of an electron cloud for the nominal LHC beam. The conditioning period of the liner surface can be considerab...

Descripción completa

Detalles Bibliográficos
Autores principales: Brüning, Oliver Sim, Caspers, Friedhelm, Collins, I R, Gröbner, Oswald, Henrist, Bernard, Hilleret, Noël, Laurent, Jean Michel, Morvillo, M, Pivi, M, Ruggiero, F, Zhang, X
Lenguaje:eng
Publicado: 1999
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/386682
_version_ 1780893597906763776
author Brüning, Oliver Sim
Caspers, Friedhelm
Collins, I R
Gröbner, Oswald
Henrist, Bernard
Hilleret, Noël
Laurent, Jean Michel
Morvillo, M
Pivi, M
Ruggiero, F
Zhang, X
author_facet Brüning, Oliver Sim
Caspers, Friedhelm
Collins, I R
Gröbner, Oswald
Henrist, Bernard
Hilleret, Noël
Laurent, Jean Michel
Morvillo, M
Pivi, M
Ruggiero, F
Zhang, X
author_sort Brüning, Oliver Sim
collection CERN
description An adequate dose of photoelectrons, accelerated by low-intensity proton bunches and hitting the LHC beam screen wall, will substantially reduce secondary emission and avoid the fast build-up of an electron cloud for the nominal LHC beam. The conditioning period of the liner surface can be considerably shortened thanks to secondary electrons, provided heat load and beam stability can be kept under control; for example this may be possible using a special proton beam, including satellite bunches with an intensity of 15-20% of the nominal bunch intensity and a spacing of one or two RF wavelengths. Based on recent measurements of secondary electron emission, on multipacting tests and simulation results, we discuss possible "beam scrubbing" scenarios in the LHC and present an update
id cern-386682
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1999
record_format invenio
spelling cern-3866822023-05-31T13:23:56Zhttp://cds.cern.ch/record/386682engBrüning, Oliver SimCaspers, FriedhelmCollins, I RGröbner, OswaldHenrist, BernardHilleret, NoëlLaurent, Jean MichelMorvillo, MPivi, MRuggiero, FZhang, XElectron Cloud and Beam Scrubbing in the LHCAccelerators and Storage RingsAn adequate dose of photoelectrons, accelerated by low-intensity proton bunches and hitting the LHC beam screen wall, will substantially reduce secondary emission and avoid the fast build-up of an electron cloud for the nominal LHC beam. The conditioning period of the liner surface can be considerably shortened thanks to secondary electrons, provided heat load and beam stability can be kept under control; for example this may be possible using a special proton beam, including satellite bunches with an intensity of 15-20% of the nominal bunch intensity and a spacing of one or two RF wavelengths. Based on recent measurements of secondary electron emission, on multipacting tests and simulation results, we discuss possible "beam scrubbing" scenarios in the LHC and present an updateLHC-Project-Report-290CERN-LHC-Project-Report-290oai:cds.cern.ch:3866821999-04-23
spellingShingle Accelerators and Storage Rings
Brüning, Oliver Sim
Caspers, Friedhelm
Collins, I R
Gröbner, Oswald
Henrist, Bernard
Hilleret, Noël
Laurent, Jean Michel
Morvillo, M
Pivi, M
Ruggiero, F
Zhang, X
Electron Cloud and Beam Scrubbing in the LHC
title Electron Cloud and Beam Scrubbing in the LHC
title_full Electron Cloud and Beam Scrubbing in the LHC
title_fullStr Electron Cloud and Beam Scrubbing in the LHC
title_full_unstemmed Electron Cloud and Beam Scrubbing in the LHC
title_short Electron Cloud and Beam Scrubbing in the LHC
title_sort electron cloud and beam scrubbing in the lhc
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/386682
work_keys_str_mv AT bruningoliversim electroncloudandbeamscrubbinginthelhc
AT caspersfriedhelm electroncloudandbeamscrubbinginthelhc
AT collinsir electroncloudandbeamscrubbinginthelhc
AT grobneroswald electroncloudandbeamscrubbinginthelhc
AT henristbernard electroncloudandbeamscrubbinginthelhc
AT hilleretnoel electroncloudandbeamscrubbinginthelhc
AT laurentjeanmichel electroncloudandbeamscrubbinginthelhc
AT morvillom electroncloudandbeamscrubbinginthelhc
AT pivim electroncloudandbeamscrubbinginthelhc
AT ruggierof electroncloudandbeamscrubbinginthelhc
AT zhangx electroncloudandbeamscrubbinginthelhc

Ejemplares similares