Plasma and Fusion Research

Volume 17, 2404064 (2022)

Regular Articles


Reduction of Energy Deposition Non-Uniformity by Adjustment of Pellet Structure for Heavy-Ion-Beam Inertial Confinement Fusion
Zhehao LIN, Kazumasa TAKAHASHI, Toru SASAKI and Takashi KIKUCHI
Nagaoka University of Technology, Nagaoka 940-2188, Japan
(Received 10 January 2022 / Accepted 23 March 2022 / Published 6 June 2022)

Abstract

We herein propose a fuel pellet with a flower-shaped tamper and an ablator layer filled with a heavier material as a heavy-ion inertial fusion target. The proposed fuel pellet structure successfully mitigates the non-uniformity of energy deposition owing to the different penetration depths at different parts of the incident heavy-ion beams. The heavier material in the ablator interferes with the movement of the ablator material. The low-density region in the ablator layer at the edge of the irradiated area is mitigated, and direct heating of the fuel by heavy-ion beams is prevented.


Keywords

direct drive, heavy-ion-beam, inertial confinement fusion, preheating, tamper

DOI: 10.1585/pfr.17.2404064


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