Density evolution measurement of hydrogen plasma in capillary discharge by spectroscopy and interferometry methods

被引：28
作者：
Jang, D. G. [1 ]
Kim, M. S. [1 ]
Nam, I. H. [1 ]
Uhm, H. S. [2 ]
Suk, H. [1 ,3 ]
机构：
[1] Gwangju Inst Sci & Technol, Grad Program Photon & Appl Phys, Kwangju 500712, South Korea
[2] Kwangwoon Univ, Kwangwoon Acad Adv Studies, Seoul 137701, South Korea
[3] Gwangju Inst Sci & Technol, APRI, Kwangju 500712, South Korea
来源：
APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 14期
基金：
新加坡国家研究基金会;
关键词：
discharges (electric); hydrogen; interferometry; plasma accelerators; plasma density; plasma diagnostics; plasma light propagation; spectroscopy; Stark effect; wakefield accelerators; ACCELERATOR;
D O I：
10.1063/1.3643134
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Plasma density is one of the most important parameters for laser wakefield acceleration using a gas-filled capillary waveguide. We measured the evolving hydrogen plasma densities in capillary discharge by using two different diagnostics methods at the same time, i.e., the Stark-effect-based spectroscopy and the transverse interferometry methods. It was found that there is a rather large difference between two methods and the phenomenon is explained in view of self-absorption. The correlation was obtained and the result is quite useful for capillary-plasma-based laser wakefield acceleration research. (C) 2011 American Institute of Physics. [doi:10.1063/1.3643134]
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页数：3
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