液氮中负极性纳秒脉冲低温等离子体
Negative-polarity nanosecond-pulsed cryogenic plasma in liquid nitrogen
AI总结：
本文通过成像与光谱测量研究液氮中负极性纳秒脉冲放电，发现电场约5 MV cm⁻¹时由微弱辉光转变为液内流注，并揭示正负极性流注在低温液内等离子体中具有相似性。
摘要：
本文报道了液氮中负极性纳秒脉冲低温放电的光学发射光谱成像与光谱测量结果。在施加较低电场时，放电首先在高压针电极周围以“微弱辉光”形式点燃；当外加电场达到约5 MV cm⁻¹的转变值时，放电模式切换为负极性液内流注。放电的光学发射光谱主要由分子氮发射带构成，对其分析表明，液氮中负极性流注的压力和温度至少为几十个大气压、约140–150 K。研究结果表明，在低温液内等离子体条件下，正、负极性流注具有相似性。
英文摘要：
In this work we report the results of imaging and spectroscopic measurements of optical emission spectrum of negative nanosecond-pulsed cryogenic discharge in liquid nitrogen. With the application of lower electric fields, the discharge first ignites as a 'faint glow' around the high voltage needle electrode, while when the applied electric field reaches transition value of around 5 MV cm-1, the discharge mode switches to negative in-liquid streamer. Optical emission spectrum of the discharge is populated by the molecular nitrogen emission bands, and their analysis shows that the pressures and temperatures of the negative streamers in liquid nitrogen are at least of few tens of atmospheres and around 140-150 K. The results of the study demonstrate similarity of positive and negative streamers in the cryogenic in-liquid plasma conditions.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
