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| Paper IPM / Particles / 13754 |
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Linac4 is a pulsed, normal- conducting 160 MeV H-
linear accelerator presently under construction at
CERN. It will replace the present 50 MeV Linac2 as inject
or of the proton accelerator complex as part of a project
to increase the LHC luminosity. The 3 MeV front end,
composed of a 45 keV ion source, a Low Energy Beam
transport (LEBT), a 352 MHz Radio Frequency
Quadrupole (RFQ) at 3 MeV and Medium Energy Beam
Transport (MEBT) housing a beam chopper, and the first Drift Tube Linac (DTL) tank at 12 MeV have been
commissioned during the first half of 2014. The
transverse and longitudinal emittance reconstruction
technique in the presence of space charge, which will beused for the next commissioning stages and permanently
during the Linac operation, was successfully tested
and validated. The reconstruction method and the results
obtained at 3 and 12 MeV are presented in this paper.
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