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Paper detail

Demonstration of a laserwire emittance scanner for the CERN LINAC4 H- Beam

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.

preprint2015arXivOpen access
T. HofmannK. O. KruchininA. BoscoS. M. GibsonF. RoncaroloG. BoormanU. RaichE. BravinJ. K. PozimskiA. LetchfordC. Gabor
physics.acc-ph
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T. HofmannK. O. KruchininA. BoscoS. M. GibsonF. RoncaroloG. BoormanU. RaichE. BravinJ. K. PozimskiA. LetchfordC. Gabor

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