CERN Accelerating science

Published Articles
Title	Beam Diagnostics Measurements at 3MeV of the LINAC4 $H^{−}$ Beam at CERN
Author(s)	Zocca, Francesca (CERN) ; Allica Santamaria, Juan (CERN) ; Duraffourg, Michel (CERN) ; Focker, Gerrit Jan (CERN) ; Gerard, Delphine (CERN) ; Kolad, Blazej (CERN) ; Lenardon, Franco (CERN) ; Ludwig, Michael (CERN) ; Raich, Uli (CERN) ; Roncarolo, Federico (CERN) ; Sordet, Michael (CERN) ; Tan, Jocelyn (CERN) ; Tassan-Viol, Jean (CERN) ; Vuitton, Christophe (CERN) ; Feschenko, Alexander (Moscow, MIPT) ; Feschenko, Alexander (Moscow, INR)
Publication	2014
Number of pages	3
In:	5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.THPME179
Subject category	Accelerators and Storage Rings ; Accelerators and Storage Rings ; Detectors and Experimental Techniques
Abstract	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.

Corresponding record in: Inspire