A Concept of a Beam Instrumentation System for the High-Intensity DARIA Proton Linac

Beam diagnostics is one of the main tasks during the operation of charged particle accelerators. The work presents the concept of a beam instrumentation system that provides diagnostic procedures and allows measurement and adjustment of the key beam parameters in a linear resonant proton accelerator of the DARIA compact neutron source: current, position, profile, emittance, energy, and phase characteristics. An important requirement is to carry out measurements during the accelerator adjustment procedure, when the beam parameters can be changed in a wide range. It is proposed to include in the main structure of the system such types of diagnostic devices as beam current transformers, stripline beam position monitors, wire scanners, ionization beam cross-section monitor, slit emittance meter, bunch shape monitor, and a water-cooled Faraday cup. Particular attention is paid to nondestructive methods of diagnostics taking into account a high pulse and average beam intensity in conjunction with a relatively low beam energy to provide continuous operational control of the beam parameters. The main physical principles of operation, typical characteristics, as well as features of the practical implementation of the devices are included. The possible layout of diagnostic units in the accelerator is proposed, taking into account the peculiarities of using the proposed types of detectors in various parts of the accelerator.