Plasma and Fusion Research

Volume 14, 3405164 (2019)

Regular Articles

Trajectory Calculation of Horizontally Injected Laser Fusion Energy Target in Residual Gas
Ryusuke TSUJI
Department of Electrical and Electronic Systems Engineering, Ibaraki University, Hitachi 316-8511, Japan
(Received 10 January 2019 / Accepted 9 October 2019 / Published 12 December 2019)

Abstract

A calculation method is presented for the trajectory of a horizontally injected spherical laser fusion energy target in a reactor filled with residual gas. To evaluate the gas resistance and the placement error of the position measurement unit (PMU) set along the injection path, a test injection is successively made two times and the target positions in flight are measured by PMUs. Two unknown system parameters, gas resistance and placement error, are determined by solving an equation system. After determining the system parameters, the arrival position and arrival time of the newly injected fusion target at the reactor center can be calculated by simple arithmetic with the time data and position data of the injected target in flight.

Keywords

trajectory calculation, laser fusion energy target, Arago spot, Poisson spot, position measurement unit, placement error, gas resistance

DOI: 10.1585/pfr.14.3405164

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