Energy and flux measurements of laser-induced silver plasma ions by using Faraday cup

作     者：Muhammad Usman Aslam BHATTI Shazia BASHIR Asma HAYAT Khaliq MAHMOOD Rana AYUB Mubashir JAVED Muhammad Shahzad KHAN Muhammad Usman Aslam BHATTI;Shazia BASHIR;Asma HAYAT;Khaliq MAHMOOD;Rana AYUB;Mubashir JAVED;Muhammad Shahzad KHAN

作者机构：Centre for Advanced Studies in Physics(CASP)GC UniversityLahore 54000Pakistan 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2021年第23卷第8期

页      面：188-198页

核心收录：

学科分类：07[理学] 070204[理学-等离子体物理] 0702[理学-物理学] 

主　　题：laser ablation laser-induced plasma ions Faraday cup time of flight measurements self-generated electric field angular distribution 

摘      要：Silver(Ag)plasma has been generated by employing Nd:YAG laser(532 nm,6 ns)laser *** energy and flux of ions have been evaluated by using Faraday cup(FC)using time of flight(TOF)*** dual peak signals of fast and slow Ag plasma ions have been *** energy and flux of fast and slow ions tend to increase with increasing irradiance from 7 GW cm-2 to 17.9 GW cm-2 at all distances of FC from the target *** a decreasing trend of energies and flux of ions has been observed with increasing distance of FC from the *** maximum value of flux of the fast component is21.2×10^(10) cm^(-2),whereas for slow ions the maximum energy and flux values are 8.8 keV,8.2×10^(10) cm^(-2) *** the analysis of plume expansion dynamics,the angular distribution of ion flux measurement has also been *** overall analysis of both spatial and angular distributions of Ag ions revealed that the maximum flux of Ag plasma ions has been observed at an optimal angle of~15°.In order to confirm the ion acceleration by ambipolar field,the self-generated electric field(SGEF)measurements have also been performed by electric probe;these SGEF measurements tend to increase by increasing laser *** maximum value of 232 V m^(-1) has been obtained at a maximum laser irradiance of 17.9 GW cm^(-2).