電子迴旋脈射之諧波作用研究

The Study of Harmonic Electron Cyclotron Maser Interaction

林語儂(Yu-Nung Lin)

指導教授 ： 朱國瑞

國立臺灣大學/理學院/物理研究所/碩士(2016年)

https://doi.org/10.6342/NTU201610445

摘要

無資料

關鍵字

電子迴旋脈射 ； 諧波作用 ； 線性靜磁場 ； 磁旋管 ； 繞軸旋轉電子束 ； 離軸旋轉電子束

並列摘要

The electron cyclotron maser (ECM) is an electron radiation mechanism that originates from the interaction between electrons and an electromagnetic wave with a relativistic effect involved. The synchronism condition for sustained interaction requires the electron cyclotron frequency multiplied by cyclotron harmonic number s to be close to the electromagnetic wave frequency. Hence, higher harmonic interactions are of critical importance to the generation of high frequency radiation with a manageable magnetic field. However, the coupling strength decreases as harmonic number increases, which may suggest greater beam power for building up efficient interactions. Also the efficiency in higher harmonic case is usually lower than what is obtainable in the fundamental harmonic case. In this thesis, the optimization conditions for ECM interactions by using both large-orbit electron beam and small-orbit electron beam are examined via fundamental to fourth harmonics, and the efficiency enhancement in a tapered magnetic field are observed through simulation works.

並列關鍵字

electron cyclotron maser ； harmonic interaction ； tapered magnetic field ； gyrotron ； large-orbit electron beam ； small-orbit electron beam

參考文獻

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