A novel three-axis cylindrical hohlraum designed for inertial confinement fusion ignition

TL;DR

This paper introduces a new three-axis cylindrical hohlraum design for inertial confinement fusion that achieves low drive asymmetry, high coupling efficiency, and low laser plasma interaction, promising improved ignition performance.

Contribution

The paper presents a novel three-axis cylindrical hohlraum design with optimized symmetry and efficiency for inertial confinement fusion, without requiring additional technology.

Findings

Drive asymmetry below 1% throughout the pulse

Coupling efficiency comparable to spherical hohlraums

Low laser plasma interaction with minimal backscattering

Abstract

A novel ignition hohlraum for indirect-drive inertial confinement fusion is proposed, which is named as three-axis cylindrical hohlraum (TACH). TACH is a kind of 6 laser entrance holes (LEHs) hohlraum, which is made of three cylindrical hohlraums orthogonally jointed. Laser beams are injected through every entrance hole with the same incident angle of 55{\deg}. The view-factor simulation result shows that the time-varying drive asymmetry of TACH is no more than 1.0% in the whole drive pulse period without any supplementary technology such as beam phasing etc. Its coupling efficiency of TACH is close to that of 6 LEHs spherical hohlraum with corresponding size. Its plasma-filling time is close to typical cylindrical ignition hohlraum. Its laser plasma interaction has as low backscattering as the outer cone of the cylindrical ignition hohlraum. Therefore, the proposed hohlraum provides a competitive candidate for ignition hohlraum.