Of a supersonic gas jet for beam profile monitor

Recently, we have developed a novel beam profile monitor based on a supersonic gas jet. It can be applied to some extreme situation while other methods are not applicable such as for the high intensity and energy beams with destructive power and for the short life beam which requires minimum interference. The resolution of this monitor depends on the jet thickness and homogeneity, and thus we developed a movable gauge to investigate the gas jet distribution in a 3D manner. In this paper, we will present the measurement of the distribution of the gas jet and discuss the future improvement for the jet design.