Numerical Calculation of Gain Coefficient for Recombination X-Ray Lasers in a Carbon Cluster Plasma
Numerical Calculation of Gain Coefficient for Recombination X-Ray Lasers in a Carbon Cluster Plasma
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碳团簇等离子体中复合X射线激光器增益系数的数值计算
DOI：
10.1007/978-3-319-73025-7_10
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Namba S.
中科院分区：
文献类型：
--
作者：
Kawazome H.;Namba S.
为了优化电荷交换复合型X射线激光器的等离子体参数，通过求解速率方程模型计算了等离子体的增益系数。完全电离的碳离子与大截面的氦原子进行电荷交换，产生C5+离子，通过C6++ He → C5+（n= 3）+ He+捕获到一定的激发能级。在类氢碳中的预期激光跃迁为C_（5+）n= 2-3，波长为λ= 18.2nm。当电子温度范围为20至50 eV，电子密度为~ 1019 cm −3时，计算显示由于电荷交换过程，增益系数增加。
In order to optimize plasma parameters for a charge exchange recombination scheme X-ray laser, the gain coefficient has been calculated by solving a rate equation model. Fully ionized carbon ions are subject to the charge exchange between the helium atom with a large cross section, resulting in the generation of C5+ions captured into a certain excited level via C6++ He → C5+(n= 3) + He+. The expected lasing transition in hydrogen-like carbon and its wavelength are C5+n= 2–3 andλ= 18.2 nm, respectively. When the electron temperature ranges from 20 to 50 eV and the electron density is ~1019cm−3, the calculations show an increase in the gain coefficient owing to the charge exchange process.