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

被引：30

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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