Effect of the Laser Contrast Ratio within Picosecond Timescales on Generating a High-Quality Electron Beam by Laser–Plasma Interaction
Effect of the Laser Contrast Ratio within Picosecond Timescales on Generating a High-Quality Electron Beam by Laser–Plasma Interaction
复制标题
皮秒时间尺度内激光对比度对激光-等离子体相互作用产生高质量电子束的影响
DOI：
10.1143/jjap.50.066401
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
他13名
中科院分区：
文献类型：
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作者：
H. Kotaki;M. Kando;I. Daito;T. Kameshima;K. Kawase;他13名
皮秒量级的激光对比度是激光加速的重要参数之一。为了获得高的激光对比度，通过使用20 TW的钛宝石激光器获得了具有44 pC电荷的140 MeV单能电子束。对于低的激光对比度，产生低质量的电子束或不产生电子束，因为在主脉冲与等离子体相互作用之前，预脉冲吹出等离子体电子并使等离子体处于无序状态。激光对比度应该足够高，以便产生具有大量电荷的高质量电子束。
The laser contrast ratio within picosecond timescales is one of the important parameters for laser acceleration. For a high laser contrast ratio, a 140 MeV monoenergetic electron beam with a charge of 44 pC is obtained by using a 20 TW Ti: sapphire laser. For a low laser contrast ratio, a low quality electron beam or no electron beam is generated, because the pre-pulse blows out plasma electrons and puts the plasma into disorder before the main pulse interacts with the plasma. The laser contrast ratio should be high enough in order to generate a high quality electron beam with a large amount of charge.