A bunch extension monitor for the SPIRAL2 LINAC

MOPD26, PosterInternational audienceMeasurements of the bunch longitudinal shape of beamparticles are crucial for optimization and control ofLINAC beam parameters and maximization of itsintegrated luminosity. The non-interceptive bunchextension monitor for the LINAC of SPIRAL2 facility isbeing developed at GANIL. Five bunch extensionmonitors will be installed at the beginning of the LINACbetween superconducting cavities. The principle ofoperation is based on the registration of x-rays induced byions of accelerator beam interacting with a thin tungstenwire positioned on the beam path. The monitor consists oftwo parts: a system for wire insertion and positioning, andan x-ray detector based on microchannel plates (MCP). Adetector prototype has been developed for three years andwas tested using protons and heavy ions beams. Theinfluence of the cryomodule operation on the diagnosticmeasurement was also studied