准单能MeV离子束的激光加速
B M Hegelich1, B J Albright, J Cobble
1Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. hegelich@lanl.gov
Nature
|January 27, 2006
概括
研究人员实现了近似单能激光驱动的碳离子,使能量传播显著减少. 这一突破使紧的MeV离子加速器在医学和核聚变能源领域的应用得到了推进.
科学领域:
- 物理 物理学 物理
- 等离子体物理学的物理学
- 激光-粒子加速 激光-粒子加速
背景情况:
- 激光与等离子体的强烈相互作用加速粒子,产生相对论电子束.
- 激光驱动的离子束具有独特的特性,如短脉冲和高电流.
- 目前激光驱动的离子束的一个主要局限性是它们的能量分布很广,阻碍了应用.
研究的目的:
- 为了克服激光驱动离子束中大量能量传播的挑战.
- 为了生产准单能激光驱动的碳离子 (C5+).
主要方法:
- 使用与等离子体相互作用的超高强度激光.
- 专注于优化实验条件以减少离子能量扩散.
主要成果:
- 成功地产生了准单能C5+离子,其能量扩散率降低了17%.
- 每个核子的平均离子能量达到3 MeV.
- 测量了低于2 x 10(-6) eVs的纵向发射,用于小于皮秒脉冲.
结论:
- 证明了一种可行的方法,用于产生准单能激光驱动的离子束.
- 这一进步为紧的MeV离子加速器铺平了道路.
- 潜在的应用包括医学物理学,惯性封闭融合和快速点火.
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