Superthermal and efficient-heating modes in the interaction of a cone target with ultraintense laser light.
Superthermal and efficient-heating modes in the interaction of a cone target with ultraintense laser light.
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DOI：
10.1103/physrevlett.102.045009
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发表时间：
2009-01
影响因子：
8.6
通讯作者：
Hirotaka Nakamura;B. Chrisman;T. Tanimoto;M. Borghesi;K. Kondo;M. Nakatsutsumi;T. Norimatsu;M. Tampo;K. Tanaka;T. Yabuuchi;Y. Sentoku;R. Kodama
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文献类型：
--
作者：
Hirotaka Nakamura;B. Chrisman;T. Tanimoto;M. Borghesi;K. Kondo;M. Nakatsutsumi;T. Norimatsu;M. Tampo;K. Tanaka;T. Yabuuchi;Y. Sentoku;R. Kodama
通过改变激光脉冲的聚焦点，研究了相对论强度激光脉冲与锥线目标之间的相互作用。当脉冲聚焦在锥的侧壁时，产生了能量为10mev的超热电子，而当脉冲聚焦在锥尖时，产生了能量约为1mev的能量较低的电子。当脉冲聚焦在尖端时，观察到明显的中子信号，表明金属丝的有效加热。细胞内粒子模拟结果表明，由于侧壁反射光产生的高能电子，金属丝的加热减少。
Interactions between a relativistic-intensity laser pulse and a cone-wire target are studied by changing the focusing point of the pulse. The pulse, when focused on the sidewall of the cone, produced superthermal electrons with an energy >10 MeV, whereas less energetic electrons approximately 1 MeV were produced by the pulse when focused on the cone tip. Efficient heating of the wire was indicated by significant neutron signals observed when the pulse was focused on the tip. Particle-in-cell simulation results show reduced heating of the wire due to energetic electrons produced by specularly reflected light at the sidewall.