标题： 电离率与激光强度的关系，由中性气体暴露于800纳米超短脉冲激光时的离子计数与峰值强度确定 显示英文标题

标题： Ionization rate vs. laser intensity determined from ion count vs. peak intensity due to neutral gas exposure to an 800 nm ultrashort pulsed laser

摘要： 氩气、O$_{2}$和 N$_{2}$在线偏振 $800$ 纳米光的局部瞬时激光强度 $I$ 下的平均电离率，通过数值反演已发表的时间飞行离子光谱仪数据确定，其范围约为 $300$ 太瓦/平方厘米 $^{2}$。 通过将其与高$I_{0}$解决方案拟合，重新校准了光谱仪末端微通道板（MCP）的已发布 Ar$^{+}$收集效率及其$I_{0}$范围。 其他物种的相对收集效率由已发布的MCP阴极数据确定。 O$_2$的结果与用于确定其在多光子（低$I$）区域中的截面$\sigma_8$的已发布数据的重新评估一致。 显示英文摘要

摘要： The optical cycle-averaged ionization rate of Ar, O$_{2}$, and N$_{2}$ vs. local instantaneous laser intensity $I$ for linear polarized $800$ nm light is determined up to approx. $300$ TW/cm$^{2}$ by numerically inverting published time-of-flight ion spectrometer data. The published Ar$^{+}$ collection efficiency of the microchannel plate (MCP) at the end of the spectrometer and its $I_{0}$ scale are recalibrated by fitting it to its high $I_{0}$ solution. The relative collection efficiencies of the other species are determined by published MCP cathode data. Results for O$_2$ are consistent with a reevaluation of published data used to determine its cross section $\sigma_8$ in the multiphoton (low $I$) regime.