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| ???org.dspace.app.webui.jsptag.ItemTag.dcfield??? | Value | Language |
|---|---|---|
| dc.contributor.advisor | 朱國瑞(Kwo-Ray Chu) | |
| dc.contributor.author | Chih-Yuan Lee | en |
| dc.contributor.author | 李致遠 | zh_TW |
| dc.date.accessioned | 2021-06-16T05:41:54Z | - |
| dc.date.available | 2014-08-17 | |
| dc.date.copyright | 2014-08-17 | |
| dc.date.issued | 2014 | |
| dc.date.submitted | 2014-08-11 | |
| dc.identifier.citation | [1] K. R. Chu, Rev. Mod. Phys. 76(2), 489, 2004.
[2] K. R. Chu, Nonlinear formulation for gyro-TWT and CARM amplifier. [3] P. Forman, Rev. Mod. Phys. 67, 397, 1995. [4] A. V. Gaponov-Grekhov and V. L. Granatstein, Applications of High- Power Microwaves, Artech Houe, Boston, London, 1994. [5] K. R. Chu, H. Y. Chen, C. L. Hung, T. H. Chang, L. R. Barentt, S. H. Chen, T. T. Yang and Demostehenes J. Dialetis, IEEE Trans. Plasma Sci. 27, 1999. [6] C. S. Kou, S. H. Chen, L. R. Barnett, H. Y. Chen, and K. R. Chu, Phys. Rev. Lett.70, 924, 1993. [7] C. S. Kou, Phys. Plasmas, 1, 3093, 1994. [8] M. A. Baten, W. C. Guss, K. E. Kreischer, R. J. Temkin, and M. Caplan, Int. J. Infr. Millimeter Wave, 16, 889, 1995. [8] A. K. Ganguly and S. Ahn, Int. J. Electronics, 67, 261, 1989. [9] T. A. Spencer, C. E. Davis, K. J. Hendricks, F. J. Agee and R. M. Gilgenbach, IEEE Trans. Plasma Sci. 4, 630, 1996. [10] C. S. Kou, C. H. Chen. and T. J. Wu, Phys. Rev. E. 57, 7162, 1998. [11] K. Ganguly and S. Ahn, Appl. Phys. Lett. 54, 514, 1989. [12] M. T. Walter, R. M. Gilgenbach, J. W. Luginsland, J. M. Hochman, J. I, Rintamaki, R. L. Jaynes, Y. Y. Lau, and T. A. Spencer, IEEE Trans. Plasma Sci. 24, 636, 1993. [13] A. T. Lin and C. C. Lin, Phys. Fluids B. 5, 2314, 1993. [14] G. S. Nusinovich, and O. Dumbrajs, IEEE Trans. Plasma Sci. 24, 620, 1996. [15] J. M. Wachtel and E. J. Wachtel, Appl. Phys. Lett, 34, 1059, 1980. [16] S. Y. Park, V. L. Granatstein, and R. K. Parker, Int. J. Electronics, 57, 1109, 1984. [17] A. K. Ganguly and S. Ahn, Appl. Phys. Lett, 54, 514, 1989. [18] A. T. Lin, Phys. Rev. A. 46,4516, 1992. [19] M. J. Arman, IEEE Trans. Plasma Sci. 26,693, 1998. [20] S. H. Chen, K. R. Chu, and T.H. Chang, Phys. Rev. Lett. 85, 2633, 2000. [21] T. H. Chang, S. H. Chen, L. R. Barnett and K. R. Chu, Phys. Rev. Lett. 87, 064802, 2001. [22] S. H. Chen, T. H. Chang, K. F. Pao, C. T. Fan and K. R. Chu, Phys. Rev. Lett. 89, 268303, 2002. [23] G. S. Nusinovich, A. N. Vlasov, and T. M. Antonsen, Jr., Phys. Rev. Lett. 87, 218301, 2001. [24] A. Grudiev and K. Schunemann, IEEE Trans. Plasma Sci. 30, 851, 2002. [25] N. S. Ginzburg, G. S. Nusinovich, and N. A. Zavolsky, Int. J. Electron. 61, 881, 1986. [26] A. T. Lin, Z. H. Yang, and K. R. Chu, IEEE Trans. Plasma Sci. 16, 129, 1988. [27] S. Y. Parker, R. H. Kyser, C. M. Armstrong, R. K. Parker and V.L. Granatstein, IEEE Trans. Plasma Sci. 18, 321, 1990. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/56682 | - |
| dc.description.abstract | 諧波震盪交互作用已經被發現可以降低磁場的需求s倍。然而諧波藕合係數會隨著s降低並且隨著rL增加，這代表著需要更高的功率及電子能量，才可以產生足以和電子進行諧波藕合的場強。可以利用這樣的趨勢來產生超越一次諧波的功率。本研究試圖找尋磁旋震盪器在二次諧波環境下的最佳條件，並探討線性磁場對一次即二次諧波產生的效率提升效果。 | zh_TW |
| dc.description.abstract | It is shown that harmonic cyclotron interaction can alleviate the magnetic-field requirement by a factor of s
. However, the harmonic coupling coefficient decreases with s and increases with rL, which suggests that greater beam power and higher electron energy are required to generate the required field strength for efficient harmonic interaction. This trend may be exploited for the generation of high peak power beyond that obtainable in the fundamental harmonic interaction. In this study, we try to find the optimum working condition for a gyrotron oscillator at second harmonic mode. We also investigate the advantage of taper magnetic field in the enhancement of efficiency. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-16T05:41:54Z (GMT). No. of bitstreams: 1 ntu-103-R01222041-1.pdf: 1357404 bytes, checksum: 52cccb279375979b42dd364d48461fce (MD5) Previous issue date: 2014 | en |
| dc.description.tableofcontents | 誌謝i
中文摘要ii Abstract iii Chapter 1 Introduction 1 Chapter 2 Theory of Electron Cyclotron Maser 3 2.1 Basic Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2 Bunching Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2.1 Azimuthal Bunching . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2.2 Axial Bunching . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3 Linear Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3.1 Equations of Motion . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3.2 Linear Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.3.3 Energy-Transfer Mechanisms . . . . . . . . . . . . . . . . . . . 13 2.3.4 Cyclotron Emission and Absorption . . . . . . . . . . . . . . . . 15 2.4 Nonlinear Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2.4.1 Normalized Equations . . . . . . . . . . . . . . . . . . . . . . . 20 2.4.2 Nonlinear Interaction . . . . . . . . . . . . . . . . . . . . . . . . 22 2.4.3 Saturated Efficiency and its Limitation . . . . . . . . . . . . . . 24 2.5 Harmonic Interaction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 2.5.1 Harmonic Fields . . . . . . . . . . . . . . . . . . . . . . . . . . 27 2.5.2 Physical Interpretation and Significance of Harmonic Interaction . 29 2.5.3 Optimum Conditions for Harmonic Interaction . . . . . . . . . . 31 Chapter 3 Physical Model and Numerical Simulation 32 3.1 Basic Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 3.2 Simplification and Normalization of Equation of Motion . . . . . . . . . 32 3.3 Electromagnetic Field in a Closed Cilyndrical Ideal Cavity . . . . . . . . 35 3.4 Specification of the Initial Condition of a Single Electron . . . . . . . . . 37 3.5 Specification of Applied Magnetic Field . . . . . . . . . . . . . . . . . . 38 3.6 Power Balance in a Cavity . . . . . . . . . . . . . . . . . . . . . . . . . 39 Chapter 4 Simulation Result 41 4.1 Selecting Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 4.2 Optimum Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 4.3 Dynamical Behavior of Electron . . . . . . . . . . . . . . . . . . . . . . 45 4.3.1 Constant Magnetic Field . . . . . . . . . . . . . . . . . . . . . . 45 4.3.2 Taper Magnetic Field . . . . . . . . . . . . . . . . . . . . . . . . 48 Chapter 5 Conclusion 53 | |
| dc.language.iso | en | |
| dc.subject | 線性磁場 | zh_TW |
| dc.subject | 電子迴旋脈射 | zh_TW |
| dc.subject | 諧波震盪 | zh_TW |
| dc.subject | 諧波藕合係數 | zh_TW |
| dc.subject | harmonic coupling coefficient | en |
| dc.subject | taper magnetic field | en |
| dc.subject | harmonic interaction | en |
| dc.subject | electron cyclotron maser | en |
| dc.title | 二次諧波磁旋震盪器之效率提升研究 | zh_TW |
| dc.title | Efficiency Enhancement of Gyrotron Oscilator at Second Harmonic Mode | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 102-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 張存續,陳寬任,陳仕宏 | |
| dc.subject.keyword | 諧波震盪,電子迴旋脈射,諧波藕合係數,線性磁場, | zh_TW |
| dc.subject.keyword | harmonic interaction,electron cyclotron maser,harmonic coupling coefficient,taper magnetic field, | en |
| dc.relation.page | 55 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2014-08-12 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 物理研究所 | zh_TW |
| Appears in Collections: | 物理學系 | |
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| File | Size | Format | |
|---|---|---|---|
| ntu-103-1.pdf Restricted Access | 1.33 MB | Adobe PDF |
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