Observation of scintillation light spots for 20keV H^- ion beams using glass viewer and digital camera and measurement of beam profiles using freeware ImageJ (II)

In the previous symposium, we reported that we could take the picture of scintillation light spots for H^- ions with such a low energy as 20keV using a glass viewer and a digital camera and quickly deduce the beam profiles from the obtained pictures using a famous freeware ImageJ in biology and medical science. In this report, in order to resolve the problem that H^- ions extracted from the hole on the anode are bent by the stray magnetic field of Permanent Magnets for Penning discharge and they depart from the central axis of the Einzel lens by introducing a compact dipole magnet to correct the ion orbit right, we measured the beam profiles of H^- ion beams on 0deg Course Viewer focused by the voltages of Einzel lens (Vein=-12.5kV, -13.0kV, -13.5kV, -14.0kV and -14.5kV) at 2, 3, 5 Permanent Magnets using the obtained methods and showed ImageJ Surface Plot 2D Presentations, Intensity Distributions for x axis and for y axis of these beam profiles. (author)