Wobbling Heavy Ion Beam Illumination in Heavy Ion Inertial Fusion

• Published in: Plasma and Fusion Research Vol. 8; p. 3404048
• Main Authors: KAWATA, Shigeo, KUROSAKI, Tatsuya, KOSEKI, Shunsuke, NOGUCHI, Kenta, BARADA, Daisuke, OGOYSKI, Alexander Ivanov, BARNARD, John J., LOGAN, B. Grant
• Format: Journal Article
• Language: English
• Published: The Japan Society of Plasma Science and Nuclear Fusion Research 2013
• Subjects: direct drive target; heavy ion beam illumination uniformity; heavy ion inertial fusion; instability dynamic mitigation; uniform target implosion; wobbling heavy ion beam
• ISSN: 1880-6821; 1880-6821
• DOI: 10.1585/pfr.8.3404048

A few % wobbling-beam illumination nonuniformity is realized in heavy ion inertial confinement fusion (HIF) by a spiraling beam axis motion. So far the wobbling heavy ion beam (HIB) illumination was proposed to realize a uniform implosion in HIF. However, the initial imprint of the wobbling HIBs introduces a large unacceptable energy deposition nonuniformity. In the wobbling HIBs illumination, the illumination nonuniformity oscillates in time and space. The oscillating-HIB energy deposition may contribute to the reduction of the HIBs' illumination nonuniformity. The wobbling HIBs can be generated in HIB accelerators and the oscillating frequency may be several 100 MHz ∼ 1 GHz. Three-dimensional HIBs illumination computations presented here show that the few % wobbling HIBs illumination nonuniformity oscillates successfully with the same wobbling HIBs frequency.