Experimental results of the laserwire emittance scanner for LINAC4 at CERN

Within the framework of the LHC Injector Upgrade (LIU), the new LINAC4 is currently being commissioned to replace the existing LINAC2 proton source at CERN. After the expected completion at the end of 2016, the LINAC4 will accelerate H- ions to 160 MeV. To measure the transverse emittance of the H-...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Hofmann, T, Boorman, G E, Bosco, A, Bravin, E, Gibson, S M, Kruchinin, K O, Raich, U, Roncarolo, F, Zocca, F
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 18.11.2015
Subjects
CERN
Dipoles
Emittance
Laser beams
Lasers
Photons
Physics - Accelerator Physics
Pulsed lasers
Online AccessGet full text

Cover

More Information
Summary:Within the framework of the LHC Injector Upgrade (LIU), the new LINAC4 is currently being commissioned to replace the existing LINAC2 proton source at CERN. After the expected completion at the end of 2016, the LINAC4 will accelerate H- ions to 160 MeV. To measure the transverse emittance of the H- beam, a method based on photo-detachment is proposed. This system will operate using a pulsed laser with light delivered via an optical fibre and subsequently focused through a thin slice of the H- beam. The laser photons have sufficient energy to detach the outer electron and create H0/e- pairs. In a downstream dipole, the created H0 particles are separated from the unstripped H- ions and their distribution is measured with a dedicated detector. By scanning the focused laser across the H- beam, the transverse emittance of the H- beam can be reconstructed. This paper will first discuss the concept, design and simulations of the laser
ISSN:2331-8422
DOI:10.48550/arxiv.1511.05876