MYRRHA accelerator: Beam shape and profile

In order to get heat deposited by the proton distributed correctly over the target surface, both beam profile shaping and beam wiggling is required. The former determines the local intensity of the proton over a cross section through it. Usually, the beam profile is elliptic, parabolic or gaussion.

In MYRRHA we envisage a pencil like beam of a few mm width. By beam wiggling, the proton beam is scanned over the target surface in a given pattern. This is required to avoid the recirculation zone in the centre and the beam tube wall and to evenly distribute the heat over the allowed zones.