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首页> 外文期刊>Physical Review, A. Atomic, molecular, and optical physics >Characterization of a transient collisional Ni-like molybdenum soft-x-ray laser pumped in grazing incidence
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Characterization of a transient collisional Ni-like molybdenum soft-x-ray laser pumped in grazing incidence

机译：放牧发病率泵浦瞬态碰撞Ni样钼软X射线激光的特征

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摘要

We present experimental results from an extensive investigation of a Ni-like Mo x-ray laser pumped in the transient regime and GRIP configuration (GRazing Incidence Pumping). The pump laser is a 10 Hz, 1 J, Ti: sapphire laser system. The main diagnostic is a monochromatic near-field imaging system with a 1.7 micron spatial resolution that shows the soft-x-ray laser source size and position relative to the target surface. Changes of those characteristics are observed for different GRIP angles, varied between 15 and 21, while keeping all other parameters constant. Intense lasing is observed routinely at 18.9 nm with up to 3 microjoule output energy and stable operation is demonstrated at 10 Hz. We have investigated the role of several pumping parameters, in particular, the relative energy and delay between the long and short pulse. We show that this multiparameter scan leads to a well-defined optimal regime of operation and better understanding of the GRIP configuration. Finally, as the GRIP scheme requires careful tailoring of the plasma conditions to the specific soft-x-ray laser under investigation, we add a prepulse before the plasma producing long pulse to generate large-scale preplasmas. This increases the brightness of the soft-x-ray beam and leads to an almost Gaussian near-field spatial profile.
机译：我们提出了在瞬态制度和抓握构造中泵浦的Ni样Mo X射线激光的广泛研究（放牧入射泵）的实验结果。泵浦激光器是10 Hz，1 J，Ti：蓝宝石激光系统。主要诊断是单色近场成像系统，具有1.7微米的空间分辨率，显示软X射线激光源尺寸和相对于目标表面的位置。观察到这些特征的变化，用于不同的抓地角，在15到21之间变化，同时保持所有其他参数常数。在18.9nm经常观察到强烈的激光，最多3微张数输出能量，并且在10 Hz上证明稳定的操作。我们研究了几种泵送参数的作用，特别是长脉冲之间的相对能量和延迟。我们表明，该多游ameter扫描导致明确定义的最佳操作制度，并更好地理解抓握配置。最后，随着抓握方案需要仔细剪裁等离子体条件，在调查中对特定的软X射线激光器进行血浆条件，我们在等离子体产生长脉冲之前添加预脉冲以产生大规模的预增痕。这增加了软X射线束的亮度，并导致几乎高斯近场空间轮廓。

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