超强激光与平面薄膜Cu靶相互作用中的离子能谱实验研究

核聚变与等离子体物理 ›› 2012, Vol. 32 ›› Issue (4): 328-331.

超强激光与平面薄膜Cu靶相互作用中的离子能谱实验研究

唐翠明1，陈晓旭1，洪伟2

(1. 四川理工学院理学院，自贡 643002； 2. 中国工程物理研究院激光聚变研究中心，绵阳 621900)

收稿日期:2012-04-18 修回日期:2012-07-24 出版日期:2012-12-15 发布日期:2012-12-14
作者简介:唐翠明(1977-)，女，四川射洪人，讲师，硕士，主要从事强场和计算物理。
基金资助:
四川省教育厅科研项目(11ZB254；12ZB290)

The energy spectrum of ions generated by ultra-high laser and plane film copper target interaction

TANG Cui-ming1, CHEN xiao-xu1, HONG Wei2

(1. Department of Physics and Mathematics, Sichuan University of Science & Engineering , Sichuan Zigong 643002; 2. Research Center of Laser Fusion, CAEP, Sichuan Mian yang 621900)

Received:2012-04-18 Revised:2012-07-24 Online:2012-12-15 Published:2012-12-14

摘要/Abstract

摘要：

实验研究了超强激光与平面薄膜Cu靶的相互作用中，在靶背法线方向产生的离子能量分布。实验中采用固体核径迹探测器CR39和Thomson谱仪相结合测量离子能谱。实验中同时测量到了质子和C^4＋、C^3＋、C^2＋和 C^1＋离子。实验结果表明：离子沿着靶背法线方向发射，离子在一定能量处出现截断；在固体核径迹探测器CR39上可以看出碳离子信号比质子信号弱，质子的产额远高于碳离子,质子对碳离子有屏蔽作用；在相同发次中 C^4＋、C^3＋、C^2＋和C¹⁺离子随着荷质比的增大, 相应离子的截止能增加。

关键词: 飞秒激光, 质子, 碳离子, 能谱

Abstract:

In the experiment of ultra-intense laser interaction with plane film copper target, ions spectrum are studied at the target rear-side normal direction. The solid nuclear detector CR39 and Thomson spectrum are used to detect the energy spectrum of protons and carbon ions. Protons and C⁴⁺, C³⁺, C²⁺ and C¹⁺ ions have been observed. In addition, the results show that the ions are cut-off at a certain energy. Moreover, the carbon ions traces are very weaker than the protons trace, so the yields of proton is much higher than carbon ions, and the protons have some screening effect on the carbon ions. And the cut-off energy of the carbon ion is increased with the charge-to-mass ratio in the same shot.

Key words: Femtosecond laser, Proton, Carbon ion, Energy spectrum

中图分类号:

O434.12
TL65

唐翠明1，陈晓旭1，洪伟2. 超强激光与平面薄膜Cu靶相互作用中的离子能谱实验研究[J]. 核聚变与等离子体物理, 2012, 32(4): 328-331.

TANG Cui-ming, CHEN Xiao-xu, HONG Wei. The energy spectrum of ions generated by ultra-high laser and plane film copper target interaction[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2012, 32(4): 328-331.

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