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New developments in energy transfer and transport studies in relativistic laser–plasma interactions

P A Norreys, J S Green, K L Lancaster, A P L Robinson, R H H Scott, F Perez, H-P Schlenvoight, S Baton, S Hulin, B Vauzour2010年Plasma Physics and Controlled FusionIF 2.2出版社

Two critical issues related to the success of fast ignition inertial fusion have been vigorously investigated in a co-ordinated campaign in the European Union and the United States. These are the divergence of the fast electron beam generated in intense, PW laser–plasma interactions and the fast electron energy transport with the use of high intensity contrast ratio laser pulses. Proof is presented that resistivity gradient-induced magnetic fields can guide fast electrons over significant distances in (initially) cold metallic targets. Comparison of experiments undertaken in both France and the United States suggests that an important factor in obtaining efficient coupling into dense plasma is the irradiation with high intensity contrast ratio laser pulses, rather than the colour of the laser pulse itself.

日本語訳

高速点火慣性核融合の成功に関連する二つの重大な課題が、欧州連合と米国における協調的なキャンペーンにおいて精力的に研究されてきた。それらは、高強度PWレーザーとプラズマの相互作用において生成される高速電子ビームの広がりと、高強度コントラスト比レーザーパルスを用いた高速電子のエネルギー輸送である。抵抗率勾配によって誘起される磁場が、(初期状態では)冷たい金属ターゲット内で高速電子を長距離にわたって導くことができるという証拠が提示されている。フランスと米国の両方で実施された実験の比較は、高密度プラズマへの効率的な結合を達成するための重要な要因が、レーザーパルスの色ではなく、高強度コントラスト比のレーザーパルスによる照射であることを示唆している。

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Laser plasmaLaser-plasma interactionRelativistic laser
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