Electron–neutral bremsstrahlung radiation fingerprints the initial stage of nanosecond discharge in liquid water
Electron–neutral bremsstrahlung radiation fingerprints the initial stage of nanosecond discharge in liquid water
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电子中性轫致辐射描绘了液态水中纳秒放电的初始阶段
DOI：
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发表时间：
2021
影响因子：
3.8
通讯作者：
Z. Bonaventura
中科院分区：
文献类型：
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作者：
P. Bílek;Ján Tungli;T. Hoder;M. Šimek;Z. Bonaventura
我们假设在液态水中纳秒放电初始阶段观察到的基本辐射特征可归因于电子中性轫致辐射过程。从发育的发光细丝收集的辐射的主要特征是在光谱的短波长一侧发射强度急剧下降，随后在近红外波长处强度最大并随后下降。所有这些辐射特征都可以归因于电子钟状能量分布所产生的电子中性轫致。这种电子能量分布函数与电场发射到电致伸缩纳米孔的概念是一致的。这项工作的发现有助于阐明迄今为止尚不清楚的液态水等离子体产生的机制。
We postulate that basic radiative signatures observed during the initial phases of nanosecond discharge in liquid water can be attributed to the electron–neutral bremsstrahlung process. Principal characteristics of the radiation collected from developing luminous filaments consist of a sharp decrease in the emission intensity at the short-wavelength side of the spectra, followed by a maximum and subsequent decrease in intensity towards near-infrared wavelengths. All these radiative features can be attributed to the electron–neutral bremsstrahlung produced by a bell-like energy distribution of the electrons. Such an electron energy distribution function is coherent with the concept of electric field emission into electrostriction-induced nanovoids. The findings of this work help in elucidating the hitherto unclear mechanism(s) of plasma generation in liquid water.