Demonstration of a laserwire emittance scanner for hydrogen ion beams at CERN. / Hofmann, Thomas; Kruchinin, Konstantin; Bosco, Alessio; Gibson, Stephen; Roncarolo, Federico; Boorman, Gary; Raich, Uli; Bravin, Enrico; Pozimski, Juergen; Letchford, Alan; Gabor, Christoph.

In: Physical Review Special Topics: Accelerators and Beams, Vol. 18, No. 12, 122801, 21.12.2015, p. 1-10.

Research output: Contribution to journalArticlepeer-review





A non-invasive, compact laserwire system has been developed to measure the transverse emittance of an H beam and has been demonstrated at the new LINAC4 injector for the LHC at CERN. Light from a low power, pulsed laser source is conveyed via fibre to collide with the H beam, a fraction of which is neutralized and then intercepted by a downstream diamond detector. Scanning the focused laser across the H beam and measuring the distribution of the photo-neutralized particles enables the transverse emittance to be reconstructed. The vertical phase-space distribution of a 3 MeV beam during LINAC4 commissioning has been measured by the laserwire and verified with a conventional slit and grid method.
Original languageEnglish
Article number122801
Pages (from-to)1-10
Number of pages10
JournalPhysical Review Special Topics: Accelerators and Beams
Issue number12
Publication statusPublished - 21 Dec 2015
This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

ID: 25752222