Ion heating in a fast-flowing plasma for applying an advanced space propulsion

快速流动等离子体中的离子加热用于应用先进的空间推进

• 批准号: 15340196
• 负责人: ANDO Akira
• 金额: $ 10.62万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15340196/
• 关键词: Space thruster; Electric propulsion; Fast-flowing plasma; Plasma heating; Plasma acceleration; Magnetic nozzle; VASIMR; HITOP; 推力可変推進機; ヘリカルアンテナ; アルヴェン波

This research aims to establish the technique for heating the ions in a fast-flowing plasma efficiently and for converting the increased thermal energy into flow one by using a magnetic nozzle. Various technologies accumulated in plasma science and fusion researches help the development of the thruster with variable thrust, which is one of the representative in the advanced space transportation systems. We investigated in detail the ion heating method of a fast-flowing plasma and the energy conversion in a magnetic nozzle, and the following important results were obtained.1.Shear Alfven wave of m=-1 was excited efficiently with a helical-type antenna, and strong ion heating was observed in a fast-flowing plasma in the low density region.2.The effect of ion-ion collisions, the Doppler effect and the effect by the neutral gas were observed. These findings were useful for the efficient ion heating.3.We have observed experimentally that the thermal energy of ions heated nearly 100eV was converted to flow energy by passing through a divergent magnetic nozzle. It was demonstrated for the first time that the exhaust plasma flow energy could be controlled by changing an input RF power for the ion heating.4.It was also experimentally confirmed that an electric field was generated in the magnetic nozzle in the direction of the ion acceleration, and the ion velocity distribution function was measured. It was suggested that not only the energy conversion by the magnetic nozzle but also the effect of the electric field were important for the plasma acceleration.As a result, we have shown experimentally that the plasma acceleration could be controlled by the ion heating, which is a fundamental technology for the efficient space thruster, and clarified the plasma acceleration mechanism and its control methods. In this research, we have obtained a lot of important knowledge related to the establishment of the ion heating and the energy conversion technology.

本研究旨在建立一种利用磁性喷嘴有效加热快速流动等离子体中的离子，并将增加的热能转化为流动热能的技术。在等离子体科学和聚变研究中积累的各种技术为变推力器的发展提供了帮助，变推力推力器是先进空间运输系统的代表之一。本文详细研究了高速流动等离子体的离子加热方法和磁喷管中的能量转换，得到了以下重要结果：1.用螺旋天线有效地激发了m=-1的剪切Alfven波，并在低密度区观察到了高速流动等离子体中的强离子加热。2.离子-离子碰撞的影响，观察到多普勒效应和中性气体的影响。这些发现对于有效的离子加热是有用的。3.我们在实验上观察到加热到近100 eV的离子的热能通过发散的磁喷嘴被转换成流动能量。首次证明了通过改变离子加热的射频输入功率可以控制排气等离子体流的能量。4.实验证实了在磁性喷嘴中产生了沿离子加速方向的电场，并测量了离子速度分布函数。提出了在等离子体加速过程中，除了磁喷管的能量转换作用外，电场的作用也起着重要作用，并通过实验证明了离子加热对等离子体加速的控制作用，阐明了等离子体加速的机理及其控制方法。在本研究中，我们获得了许多与离子加热和能量转换技术的建立相关的重要知识。

项目成果

Improvements of Flow Characteristics for an Advanced Plasma Thruter

先进等离子推进器流动特性的改进

• 发表时间: 2005
• 期刊: Transactions of Fusion Science and Technology 47.8
• 作者: A.Ando;A.Ando;A.Ando;A.Ando;A.Ando;A.Ando;A.Ando;M.Ichimura;M.Inutake
• 通讯作者: M.Inutake

A.Ando: "Ion Heating Experiment in a Supersonic Plasma Flow for an Advanced Plasma Thruster"Bulletin of the Americal Physical Society,(DPP2003,45th, Albuquerque). RP1-137. 326-326 (2003)

A.Ando：“先进等离子推进器的超音速等离子流中的离子加热实验”美国物理学会公报，（DPP2003，第 45 期，阿尔伯克基）。

Alfven wave excitation and single- pass ion cyclotron heating in a fast- flowing plasma

快速流动等离子体中的阿尔芬波激发和单程离子回旋加速器加热

• 发表时间: 2006
• 期刊: Physics of Plasmas Vol.13
• 作者: Akira Ando;Masaaki Inutake;Motoi Hatanaka;Kunihiko Hattori;Hiroyuki Tobari and Tsuyoshi Yagai
• 通讯作者: Hiroyuki Tobari and Tsuyoshi Yagai

Spatial Distribution of Lorentz Forces in an applied Field Magneto-Plamsa-Dynamic Arcjet Plasma

外加场磁等离子体-动态电弧喷射等离子体中洛伦兹力的空间分布

• 发表时间: 2004
• 期刊: J. Plasma Fusion Research 80
• 作者: A.Ando;A.Ando;A.Ando;A.Ando;A.Ando;A.Ando;A.Ando;M.Ichimura;M.Inutake;A.Ando;A.Ando;M.Inutake;A.Ando;M.Inutake;A.Ando;M.Ichimura;M.Ichimura;M.Inutake;A.Ando;H.Tobari
• 通讯作者: H.Tobari

Development and Physics Issues of an Advanced Space Propulsion

先进空间推进装置的发展和物理问题

• 发表时间: 2004
• 期刊: Proc.of the 2^<nd> Int.School of Advanced Plasma Tech. 1
• 作者: A.Ando;A.Ando;A.Ando;A.Ando;A.Ando;A.Ando;A.Ando;M.Ichimura;M.Inutake;A.Ando;A.Ando;M.Inutake;A.Ando;M.Inutake;A.Ando;M.Ichimura;M.Ichimura;M.Inutake;A.Ando;H.Tobari;A.Ando;H.Tobari;A.Ando;A.Ando;M.Inutake;M.Inutake
• 通讯作者: M.Inutake