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@inproceedings{Kruchinin:2015,
author = {Kruchinin, KO and Boorman, G and Bosco, A and Gibson, SM and Karataev, P and Bravin, E and Hofmann, T and Raich, U and Roncarolo, F and Zocca, F and Pozimski, J and Letchford, AP},
pages = {1146--1149},
title = {Laserwire emittance scanner at CERN LINAC4},
year = {2015}
}

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TY  - CPAPER
AB  - Linac 4 presently under construction at CERN is designed to replace the existing 50 MeV Linac 2 in the LHC injector chain and will accelerate the beam of high current negative hydrogen ions to 160 MeV. During the commissioning a laserwire emittance scanner has been installed allowing noninvasive measuring of the emittance at 3 MeV and 12 MeV setups. A relatively low power infrared fibre coupled laser w a s focused in the interaction region down to ∼150 μm and collided with the ion beam neutralising negative ions. A t each transverse laser position with respect to the ion beam the angular distribution of the neutral particle beamlets w a s recorded b y scanning a diamond detector across the beamlet at a certain distance from the interaction point while the main beam of the H- ions w a s deflected using the dipole magnet installed upstream the detector. Measuring the profile of the beamlet b y scanning the laser across the beam allows to directly measure the transverse phase-space distribution and reconstruct the transverse beam emittance. In this report w e will describe the analysis of the data collected during the 3 MeV and 12 MeV operation of the Linac 4. W e will discuss the hardware status and future plans.
AU  - Kruchinin,KO
AU  - Boorman,G
AU  - Bosco,A
AU  - Gibson,SM
AU  - Karataev,P
AU  - Bravin,E
AU  - Hofmann,T
AU  - Raich,U
AU  - Roncarolo,F
AU  - Zocca,F
AU  - Pozimski,J
AU  - Letchford,AP
EP  - 1149
PY  - 2015///
SP  - 1146
TI  - Laserwire emittance scanner at CERN LINAC4
ER  -

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Dr J. Pozimski

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