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TY - CONF AU - Zocca, F. AU - Allica Santamaria, J.C. AU - Duraffourg, M. AU - Feschenko, A. AU - Focker, G.J. AU - Gerard, D. AU - Kolad, B. AU - Lenardon, L. AU - Ludwig, M. AU - Raich, U. AU - Roncarolo, F. AU - Sordet, M. AU - Tan, J. AU - Tassan-Viol, J. AU - Vuitton, C. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Beam Diagnostics Measurements at 3MeV of the LINAC4 H⁻ Beam at CERN J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - As part of the CERN LHC injector chain upgrade, LINAC4 will accelerate H⁻ ions to 160 MeV, replacing the old 50 MeV proton linac. The ion source, the Low Energy Beam Transfer (LEBT) line, the 3 MeV Radio Frequency Quadrupole and the Medium Energy Beam Transfer (MEBT) line hosting a chopper, have been first commissioned in a dedicated test stand and are now tested in the LINAC4 tunnel. Diagnostics devices are installed in the LEBT and MEBT line and in a movable diagnostics test bench which is temporarily added to the MEBT exit. The paper gives an overview of all the instruments used, including beam current transformers, beam position monitors, wire scanners and wire grids for transverse profile measurements, a longitudinal bunch shape monitor and a slit-and-grid emittance meter. The movable test bench also includes a spectrometer that allows measuring the beam energy spread in conjunction with a wire grid. The present understanding of the instrumentation performance is discussed and the measurement results that allowed characterizing the 3 MeV beam in the LINAC4 tunnel are summarized. PB - JACoW CP - Geneva, Switzerland SP - 3694 EP - 3696 KW - linac KW - emittance KW - DTL KW - electron KW - quadrupole DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-THPME179 UR - http://jacow.org/ipac2014/papers/thpme179.pdf ER -