Singh Ravi Pratap, Patel D N, Thareja Raj K
Department of Physics, Indian Institute of Technology, Kanpur, India.
Rajkiya Engineering College Sonbhadra, Uttar Pradesh, India.
Heliyon. 2022 Sep 16;8(9):e10621. doi: 10.1016/j.heliyon.2022.e10621. eCollection 2022 Sep.
We report a comparative study of a single plasma and a colliding laser produced plasma, investigated using a Faraday cup. An enhancement in ion emission and stagnation is observed in colliding plasma plume compared to single plasma plume. We observed that fast ion generation in laser ablated plasma can be achieved at large laser intensity on to the target. As laser intensity increases ionic yield increases for both colliding and single plume and at a fixed laser intensity ionic yield decreases with increase in ambient pressure. The double peak structure is observed in the ion signal at large fluence where the peaks correspond to fast and slow species. A Faraday cup composed of nine collectors is used to measure the spatial/angular distribution of ion of expanding plasma plume. Ionic yield is found to be larger in the colliding plasma plume than the single plasma plume at all spatial/angular positions.
我们报告了一项使用法拉第杯对单个等离子体和碰撞激光产生的等离子体进行的对比研究。与单个等离子体羽流相比，在碰撞等离子体羽流中观察到离子发射增强和停滞现象。我们观察到，在高激光强度作用于靶材时，激光烧蚀等离子体中可实现快速离子的产生。随着激光强度增加，碰撞羽流和单个羽流的离子产率均增加，且在固定激光强度下，离子产率随环境压力增加而降低。在高能量密度下，离子信号中观察到双峰结构，其中峰值对应快速和慢速粒子。一个由九个收集器组成的法拉第杯用于测量膨胀等离子体羽流离子的空间/角分布。发现在所有空间/角位置，碰撞等离子体羽流中的离子产率都比单个等离子体羽流中的大。
