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In-Situ Mass-to-Charge Ratio Measurement and Trajectory Control of a Vertically Injected Laser Fusion Energy Charged Target via Electric Field

Ryusuke TSUJI

Department of Electrical and Electronic Systems Engineering, Ibaraki University, Hitachi 316-8511, Japan

(Received 26 September 2020 / Accepted 17 April 2022 / Published 22 July 2022)

Abstract

A method is presented for controlling the trajectory of a vertically injected charged spherical laser fusion target. The position and time of the injected target in flight are measured in a position measurement unit using the Arago spot. After the target passes between the first pair of deflection plates, where there exists a constant electric field, the mass-to-charge ratio of the target in flight is obtained from the shift in its trajectory. The amplitude of the electric field applied between the second and third pairs of deflection plates is calculated using this ratio. After passing through the second and third pairs of deflection plates, the target deflects its trajectory to pass through the reactor center. The design parameters of the trajectory control system for a tabletop plasma device and a laser fusion reactor are presented.

Copyright (c) 2022 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

trajectory control, laser fusion energy target, position measurement unit, Arago spot, mass-to-charge ratio

DOI: 10.1585/pfr.17.1404088

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