PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Balmer-alpha and Balmer-beta Stark line intensity profiles for high-power hydrogen inductively coupled plasmas |
Wang Song-Bai (王松柏)a b, Lei Guang-Jiu (雷光玖)c, Liu Dong-Ping (刘东平)a, Yang Si-Ze (杨思泽)a |
a School of Physics and Mechanical & Electrical Engineering, Xiamen University, Xiamen 361005, China; b College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China; c Southwestern Institute of Physics, Chengdu 610041, China |
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Abstract We compare Balmer-alpha (Hα) and Balmer-beta (Hβ) emissions from high-power (1.0-6.0 kW) hydrogen inductively coupled plasmas (ICPs), and propose region I (0.0-2.0 kW), region Ⅱ (2.0-5.0 kW), and region Ⅲ (5.0-6.0 kW). In region I, both Hα emission intensity (Iα) and Hβ emission intensity (Iβ) increase with radio frequency (RF) power, which is explained by the corona model and Boltzmann's law, etc. However, in region Ⅱ, Iα almost remains constant while Iβ rapidly achieves its maximum value. In region Ⅲ, Iα slightly increases with RF power, while Iβ decreases with RF power, which deviates significantly from the theoretical explanation for the Hα and Hβ emissions in region I. It is suggested that two strong electric fields are generated in high-power (2.0-6.0 kW) hydrogen ICPs: one is due to the external electric field of high-power RF discharge, and the other one is due to the micro electric field of the ions and electrons around the exited state hydrogen atoms in ICPs. Therefore, the strong Stark effect can play an important role in explaining the experimental results.
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Received: 12 October 2013
Revised: 17 March 2014
Accepted manuscript online:
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PACS:
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52.27.Gr
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(Strongly-coupled plasmas)
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52.27.-h
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(Basic studies of specific kinds of plasmas)
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Fund: Project supported by the National Magnetic Confinement Fusion Science Program of China (Grant Nos. 2011GB108011 and 2010GB103001) and the Major International (Regional) Project Cooperation and Exchanges (Grant No. 11320101005). |
Corresponding Authors:
Lei Guang-Jiu, Liu Dong-Ping
E-mail: gjlei@swip.ac.cn;dongping.liu@dlnu.edu.cn
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About author: 52.27.Gr; 52.27.-h |
Cite this article:
Wang Song-Bai (王松柏), Lei Guang-Jiu (雷光玖), Liu Dong-Ping (刘东平), Yang Si-Ze (杨思泽) Balmer-alpha and Balmer-beta Stark line intensity profiles for high-power hydrogen inductively coupled plasmas 2014 Chin. Phys. B 23 075201
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