Innovative real-time and non-destructive method of beam profile measurement under large beam current irradiation for BNCT

We developed a real-time and non-destructive method of beam profile measurement on a target under large beam current irradiation, and without any complex radiation detectors or electrical circuits. We measured the beam profiles on a target by observing the target temperature using an infrared-radiation thermometer camera. The target temperatures were increased and decreased quickly by starting and stopping the beam irradiation within 1s in response speed. Our method could trace beam movements rapidly. The beam size and position were calibrated by measuring O-ring heat on the target. Our method has the potential to measure beam profiles at beam current over 1mA for proton and deuteron with the energy around 3MeV and allows accelerator operators to adjust the beam location during beam irradiation experiments without decreasing the beam current.