Experiment of electron's Fermi acceleration by an oscillating electrostatic potential well

振荡静电势阱电子费米加速实验

• 批准号: 12680474
• 负责人: TSUSHIMA Akira
• 金额: $ 1.28万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12680474/
• 关键词: Electrou Acceleration; Fermi Acceleration; Stochastic Acceleration; Electrostatic Potontial; Electror Cloud; Phase Space; Chaos; Island Structuro

The purpose of this work is to study the characteristics of Fermi acceleration, which is one of the basic acceleration mechanisms of space and laboratory plasmas. The followings are the main results :(1) Construction of a laboratory system.Electrons moving along magnetic field lines are confined by two electrostatic potential walls and were accelerated by the oscillation of one of the two potential walls. The conditions for the laboratory system are the vacuum less than 1 × 10^(-4) Pa and the accuracy of the magnetic field alignment with the electron trap less than 5 × l0^(-3).(2) Observation of resonant frequency for the acceleration of electrons reflected by an oscillating electrostatic potential wall.When the potential wail oscillated with a characteristic frequency associated with the spatial structure of the potential wall, strong electron acceleration was observed. The characteristic frequency is then expressed by f_0= 2eV_0/(πmS^2) when the potential wall is given by V = -V_0 (x/s)^2 for x < 0 and V = 0 for x 【greater than or equal】 0.

这项工作的目的是研究费米加速度的特征，这是太空和实验室等离子体的基本加速机制之一。以下是主要结果：（1）构建实验室系统。沿磁场线移动的电子被两个静电势壁限制，并通过两个电势壁之一的振荡加速。实验室系统的条件是真空小于1×10^（-4）PA，磁场对准与电子陷阱小于5×l0^（-3）的磁场对齐的准确性。（2）（2）在振动电位的旋转电位频率相关的频率与电位范围内相关的电子相互反射的电子加速的共振频率的观察。观察到加速度。然后，当电位壁由v = -v_0（x/s）^2给出x <0和v = 0时，特征频率由f_0 = 2ev_0/（πms^2）表示，x [大于或等于] 0。

项目成果

A.Tsushima, O.Ishihara, H.Takahashi, K.Miyahara: "Interaction of Electrons with an Oscillating Potential"Journal of Plasma and Fusion Research. S4. 591-594 (2001)

A.Tsushima、O.Ishihara、H.Takahashi、K.Miyahara：“电子与振荡势的相互作用”等离子体与聚变研究杂志。

A. Tsushima et al.: "Interaction of Electros with an Oscillating Potential"J. Plasma Fusion Res.. 4. 591-594 (2001)

A. Tsushima 等人：“电子与振荡电位的相互作用”J。

A.Tsushima et al.: "Interaction of Electrons with an Oscillating Potential"Journal of Plasma and Fusion Research. 4. 591-594 (2001)

A.Tsushima 等人：“电子与振荡电势的相互作用”等离子体与聚变研究杂志。