Characteristics of Ion Beams Produced in a Plasma Focus Device

概要

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The characteristics of the ion beams produced in a plasma focus device were studied. In the experiment, a Mather-type plasma focus device was used which was prefilled with H2 at 2.3 Torr. Ion species and their energy spectra were evaluated with a Thomson parabola spectrometer. The particle pinhole image was obtained with an aluminum filtered particle pinhole camera. The ion current density was measured with a biased ion collector. From the measurement, the proton beam energy was found to be distributed from 0.15 MeV to 2 MeV@. The particle pinhole image of the proton beam with an energy of more than 1 MeV has spotlike patterns. The ion current density of 2400 A/cm2 with a pulse width of 50 ns was observed on the axis at $z=260$ mm from the top of the anode. The peak power brightness of the proton beams was evaluated to be 18 GW/cm2/sr/keV, and the total power brightness was evaluated to be 20 TW/cm2/sr.
Publication Office, Japanese Journal of Applied Physics, Faculty of Science, University of Tokyoの論文
2001-02-28