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系統識別號 U0026-2708201016421100
論文名稱(中文) 開發磁化電漿中低頻螺旋電漿源實驗
論文名稱(英文) Development of Low Frequency Helicon Source for Magnetized Plasma Experiment
校院名稱 成功大學
系所名稱(中) 太空天文與電漿科學研究所
系所名稱(英) Assistant, Institute of Space, Astrophysical and Plasma Sciences(ISAPS)
學年度 98
學期 2
出版年 99
研究生(中文) 廖永元
研究生(英文) Yong-Yuan Liao
學號 la697112
學位類別 碩士
語文別 英文
論文頁數 75頁
口試委員 召集委員-陳秋榮
指導教授-河森榮一郎
口試委員-間瀨淳
口試委員-西村泰太郎
中文關鍵字 磁化電漿  低頻  螺旋電漿源 
英文關鍵字 Low Frequency  Helicon Source  Magnetized Plasma 
學科別分類
中文摘要 我們設計一個使用範圍在我們磁化電漿實驗操作範圍內的低頻螺旋電漿源系統。這個超低頻螺旋電漿源可以延伸應用微擾量測實驗的頻率。為了未來的高功率系統此裝置基於預算或是訓練目的完全是可以在家製造的。此系統包含了功率放大器,功率量測系統,匹配器與天線。我們測試此系統的整體效能與特性並確認它符合我們的需求。它最大可以發出20W的功率。
我們計算均勻與非均勻電漿密度的螺旋波分布關係。同時我們利用功率平衡關係式來估計需求功率。這些結果都將運用於設計我們的螺旋電漿源。
低頻螺旋系統應用在磁化電漿實驗的數據指出利用入射的射頻波可以增加電子密度。此結果是利用光譜量測氬氣放射光譜的結果。同時我們也嘗試利用精密尺度的磁力拾波線圈來測量波的結構。比較實驗結果和計算的分布關係指出我們所觀察到的密度增長並非螺旋波而是電感耦合電漿模式。所以也許我們需要高功率系統(>900W)激發螺旋波。
英文摘要 We developed a low frequency (~100 kHz) helicon source system in order to expand operating space of magnetized plasma experiment (MPX). This extreme low frequency helicon source may have unique aspects such as possibility of application to high frequency fluctuation (MHz range) measurement experiment. This development was implemented completely in-house because of financial reason and training purpose for future introduction of high power system. The helicon system consists of a power amplifier, a power measurement system, a matching circuit and an antenna. Its integrated performance was tested and we confirmed the helicon system satisfies our requirement. The system has output power of 20 W at maximum.
We calculated dispersion relation of helicon wave for cases of uniform plasma density and nonuniform plasma density by following F. F. Chen’s work [Francis F. Chen 1993 Plasma Sources Sci. Technol. 3 49-57]. Also we estimated required power from a simple power balance equation. Results were used for the design of our helicon source system.
Experimental result of application of the low frequency helicon system to MPX indicated increase in electron density by injection of the rf wave. This increase was measured by a spectroscopic measurement of neutral argon emission. Also we attempted to measure wave field structure by using a fine scale pick-up coil array. Comparison between experiment and calculation of the dispersion relation implies that observed density increase was induced by other mechanisms rather than excitation of helicon mode such as ICP mode. A high power system (>900W) may be needed for excitation of helicon wave.
論文目次 摘要 1
Abstract 2
致謝 4
Contents 5
List of Tables 8
List of Figures 9
Chapter 1 Introduction 12
1.1What is plasma? 12
1.2Plasma source 13
1.3History of helicon wave 14
1.4 Purpose of this research 17
Chapter 2 Magnetized Plasma eXperiment (MPX) 19
2.1 Magnetic field coil 20
2.1.1 Hall sensor 21
2.1.2 Pick up coil 22
2.2 Langmuir probe (LP) 22
2.3 Data acquisition controller 23
2.4 Plasma Emitter 23
2.5 Spectrometer 24
Chapter 3 Theoretical treatment of helicon wave 25
3.1Despersion relation in cold plasma 25
3.1.1 Uniform plasma 25
3.1.2 Non-uniform plasma 29
3.2 Trivelpiece-Gould dispersion relation 33
3.3 Collision and collisionless damping 35
3.3.1 Landau damping 35
3.3.2 Collision damping 38
3.3.3 Energy deposition 40
3.4 Design of plasma source 41
3.4.1 Frequency range 41
3.4.2 Power requirement 42
3.4.3 Antenna Type 43
3.4.4 Summary 45
Chapter 4 Development of Low Frequency Helicon Source 46
4.0 Low frequency helicon source in MPX 46
4.1Power amplifier 47
4.2Matching circuit 50
4.2.1 Impedance matching by Smith chart 50
4.2.2 Confirmation of designed circuit parameters by Circuit Simulation
51
4.2.3 Variable capacitor and inductor 56
4.3Antenna 57
4.4 RF power measurement 58
4.5Test of Integrated System and Summary of Chapter 4 60
Chapter 5 Helicon Wave Experiment 62
5.1 Experimental result of application of Helicon source system to MPX
62
5.2 Discussion 68
Chapter 6 Summary 72
Chapter 7 Reference 74
參考文獻 [1] Francis F. Chen Introduction to Plasma Physics and Controlled Fusion
[2] Wikipedia, http://en.wikipedia.org/wiki/Main_Page
[3] Shunjiro Shinohara and Kenji Yonekura Plasma Phys. Control Fusion 42 (2000) 41-56
[4] Francis F. Chen Plasma Physics and Controlled Fusion. Vol. 33 No.4 pp339 to 364 (1991)
[5] Francis F. Chen, < Johannes Hsieh and Max Light Plasma Sources Sci. Technol. 3 49-57 (1994)
[6] Shunjiro Shinohara Rev. Sci. Instrum. 75, 1941 (2004)
[7] Mathew M Balkey, Robert Boivin, John L Kline and Earl E Scime Plasma Sources Sci. Technol. 10 (2001) 284-294
[8] T. Watari, T.Hatori, R. Kumazawa, S. Hidekuma, T. Kawamoto, M. Inutake, S. Hiroe, A. Nishizawa, K. Adati, T. Sato, T. Watanabe, H. Obayashi and K. Takayama Phys. Fluids 21 (11) 1978
[9] Trivelpiece A W and Gould R W J. Appl. Phys. 30 1784 (1959)
[10] D G Swanson plasma waves
[11] A.R. Ellingboe and R.W. Boswell Phys. Plasma 3 2797(1996)
[12] M Kramer, B Lorenz and B Clarenbach2002 Plasma Sources Sci. Technol. 11 A120-A130
[13] Darryn A. Schneider Helicon Waves in High Density Plasma (1998)
[14] J. Scharer Physics of Plasmas 9 (2002)3734-3742
[15] 高頻電路設計-市川裕一 著, 卓聖鵬 譯
[16] K Shamrai, V Pavlenko and V TARANOV Plasma Phys. Control Fusion 39 (1997) 505-529
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