<RESEARCH REPORT>SEMI-POINT-LIKE INTENSE ION BEAM SOURCE WITH HIGH BRIGHTNESS

概要

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For inertial confinement fusion by ion beam, the efficient production of high brightness ion beam is required. By a pinched electron beam diode having electrodes in a conical shape, a semi-point-like ion beam source with high brightness was obtained. The ion beam is emitted from a small region (∿6 mmφ) at the apex of the conical anode. Under the condition that the applied voltage is 200-250kV and the diode current is 30-35kA the e-folding divergence angle is 0.073 rad=4.2^0 and the ion beam current density is 3.2kA/cm^2 at the origin. From these values the brightness and the power brightness are estimated at 447MA/cm^2 sr and 1.19×10^<11>W/cm^2sr respectively. By selecting an appropriate substance including no hydrogen for small part around the apex of the anode ion beam of other than proton can be produced. Some numerical simulation are calculated for the conical diode. In this simulation Poisson equation is solved by the finite element method.
核融合科学研究所の論文