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Radiation symmetrization in indirectly driven ICF targets

M. Murakami, J. Meyer-ter-Vehn1991年被引用 57Nuclear FusionIF 3出版社

Symmetrization of the radiation field by multiple absorption and re-emission in hohlraum targets for indirectly driven inertial confinement fusion (ICF) is investigated. The radiation field on the confining wall and on the fusion capsule is calculated self-consistently, taking into account the angular distribution of the X-rays received and emitted by each surface element. Wall physics are described by approximate ablative heat wave relations, giving the absorbed flux, the temperature and the thermally re-emitted flux for each wall element. Hydrodynamic motion is not taken into account. Concerning the geometrical design, different cases of interest for heavy ion drivers are presented. It is shown that capsule illumination with 1–2% non-uniformity can be obtained with two-sided beam/X-ray conversion; single-sided drive seems not to be practicable. Symmetrization versus transfer efficiency is discussed as a function of area ratio.

日本語訳

間接駆動慣性核融合(ICF)におけるホーラムターゲット内での多重吸収・再放射による放射場の対称化について調査した。閉じ込め壁および核融合ターゲット上の放射場を、各表面要素が受ける・放出するX線の角度分布を考慮して自己無撞着に計算した。壁物理は近似的なアブレーション熱波関係式で記述し、各壁要素における吸収フラックス、温度、および熱再放射フラックスを与えた。流体力学的運動は考慮しない。幾何学的設計に関しては、重イオンドライバーにとって興味深いいくつかの場合を提示する。両側ビーム/X線変換では1〜2%の非一様性を持つターゲット照射が達成可能であることを示す。片側駆動は実用的ではないと思われる。対称化と変換効率のトレードオフを面積比の関数として議論する。

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