Measurement of laser-induced double step ionization of helium

Measurement of laser-induced double step ionization of helium
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DOI:
10.1364/oe.10.001563
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发表时间:
2002-12
期刊:
Conference on Lasers and Electro-Optics, 2003. CLEO '03.
影响因子:
--
通讯作者:
K. Kim;I. Alexeev;H.M. Milchherg
K. Kim;I. Alexeev;H.M. Milchherg
中科院分区:
其他
文献类型:
--
作者:
K. Kim;I. Alexeev;H.M. Milchherg

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在1ps的时间窗口内,以~10ps的分辨率测量了强飞秒脉冲作用下氦气射流中自由电子密度的时空演化。观察到了双倍阶梯化特征。在这些测量中,我们使用了单次激发超连续谱干涉技术。结果表明,有限的激光-气体相互作用长度可以强烈地影响对这种测量结果的解释。
The spatio-temporal evolution of the free electron density induced in a helium gas jet by an intense femtosecond pulse is measured with ~10 fs resolution in a ~1 ps temporal window. The double-stepionization feature is observed. In these measurements, we use the technique of single-shot supercontinuum spectral interferometry. It is demonstrated that finite laser-gas interaction lengths can strongly affect the interpretation of such measurements.