紫外线惊喜:在多次电离等离子中有效地产生高的软X射线
Dimitar Popmintchev1, Carlos Hernández-García2, Franklin Dollar1
1JILA, University of Colorado, Boulder, CO 80309, USA.
概括
研究人员使用波导中的紫外线激光实现了明亮的柔软X射线生成. 这种方法克服了传统的权衡,为先进的应用提供了高效的高和生成.
科学领域:
- 一秒钟的科学
- 高波生成
- 软X射线物理
背景情况:
- 高生成 (HHG) 将激光光转换为更短的波长.
- 优化HHG用于软X射线需要平衡发射效率和相位匹配.
- 短波激光可以增强辐射,而长波激光可以改善相位匹配.
研究的目的:
- 在柔软的X射线频谱中确定一种高效高的新模式.
- 克服HHG中排放产量和相匹配之间的传统权衡.
- 使用紫外线激光产生明亮的柔软X射线.
主要方法:
- 使用40周期紫外线激光驱动高和生成.
- 使用波导来促进激光与物质之间的相互作用.
- 在多次电离等离子体中研究HHG.
主要成果:
- 产生了光子能量高达280eV的明亮的软X射线束.
- 由于高紫外线折射率,在等离子体中实现有效相位匹配.
- 观察到窄线宽波,表明几乎时间带宽有限的秒脉冲 (~100 as).
结论:
- 在波导中使用紫外线激光驱动的高温气体的新系统可以有效地产生软X射线.
- 电离介质的高折射率有助于相匹配,解决了一个关键的优化挑战.
- 这种方法可以产生高质量的X射线脉冲,适用于高级研究.
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