scholarly journals Investigation of Plasma Characteristics and Ion Beam Extraction for a Micro RF Ion Thruster

2014 ◽  
Vol 12 (ists29) ◽  
pp. Pb_13-Pb_18 ◽  
Author(s):  
Yoshinori TAKAO ◽  
Masataka SAKAMOTO ◽  
Koji ERIGUCHI ◽  
Kouichi ONO
Keyword(s):  
Ion Beam ◽  
Beam Extraction ◽  
Ion Thruster ◽  
Plasma Characteristics

Design and Testing of a Double-Sided Ion Thruster for Ion-Beam Shepherd

2020 ◽  
Vol 36 (2) ◽  
pp. 202-210 ◽  
Author(s):  
M. Dobkevicius ◽  
D. Feili ◽  
M. Smirnova ◽  
A. M. Perez
Keyword(s):  
Ion Beam ◽  
Ion Thruster ◽  
Design And Testing

Low‐energy ion beam extraction and transport: Experiment–computer comparison

1994 ◽  
Vol 65 (4) ◽  
pp. 1441-1443 ◽  
Author(s):  
Peter Spädtke ◽  
Ian Brown ◽  
Paul Fojas
Keyword(s):  
Ion Beam ◽  
Low Energy ◽  
Beam Extraction ◽  
Transport Experiment

Analysis of the Effect of Beam Divergence Angle on Back-Streaming Electron Region in Ion Source for EAST-Neutral Beam Injection

2018 ◽  
Vol 4 (3) ◽  
Author(s):  
Hu Chundong ◽  
Wu Mingshan ◽  
Xie Yahong ◽  
Wei Jianglong ◽  
Yu Ling
Keyword(s):  
Ion Beam ◽  
Ion Source ◽  
Neutral Beam Injection ◽  
Beam Divergence ◽  
Neutral Beam ◽  
Divergence Angle ◽  
Beam Extraction ◽  
Beam Injection ◽  
Back Plate ◽  
Beam Divergence Angle

During the process of beam extraction in positive ion source under high voltage region, a large number of electrons are produced in the gaps of grids. After back-streaming acceleration, these electrons go back to arc chamber or impinge grids and then heat back plate or grids, which are harmful for the safety of ion source. Under the situation of poor beam extraction optics, a large part of the primary beam ions bombard the surface of suppressor grid (SG). And this process produces a large number of electrons. Due to the huge extracted voltage, the secondary electron emission coefficient of the SG surface is also high. As a result, the grids' current grows. According to the measurement of the current of SG and the calculation of the perveance of the corresponding shoot, the effect of ion beam divergence angle on back-streaming electrons can be analyzed. When the beam divergence angle increases, the number of back-streaming electrons increases rapidly, and grids' current changes significantly, especially the current of gradient grid and SG. The results can guide the parameters operating on the ion source for Experimental Advanced Superconducting Tokamak-neutral beam injection (EAST-NBI) and find the reasonable operation interval of perveance and to ensure the safety and stable running of the ion source, which has great significance on the development of long pulse, high power ion source.

Ablation plasma characteristics of flyer acceleration using a multi-pulsed ion beam irradiation

Vacuum ◽  
2009 ◽  
Vol 84 (5) ◽  
pp. 540-543 ◽  
Author(s):  
Chainarong Buttapeng ◽  
Shogo Azuma ◽  
Nobuhiro Harada
Keyword(s):  
Ion Beam ◽  
Beam Irradiation ◽  
Ion Beam Irradiation ◽  
Ablation Plasma ◽  
Plasma Characteristics

Ion beam extraction with ion space‐charge compensation in beam‐plasma type ion source

1982 ◽  
Vol 53 (9) ◽  
pp. 6018-6028 ◽  
Author(s):  
Junzo Ishikawa ◽  
Fumimichi Sano ◽  
Toshinori Takagi
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Charge Compensation ◽  
Ion Source ◽  
Beam Extraction ◽  
Beam Plasma

A 3D particle model for the plume CEX simulation

2018 ◽  
Vol 122 (1255) ◽  
pp. 1425-1441 ◽  
Author(s):  
C. Lu ◽  
P. Qiu ◽  
Y. Cao ◽  
T.P. Zhang ◽  
J.J. Chen
Keyword(s):  
Monte Carlo ◽  
Analytical Model ◽  
Ion Beam ◽  
Direct Simulation Monte Carlo ◽  
Particle Model ◽  
Neutral Atoms ◽  
Ion Thruster ◽  
Technology Application ◽  
Particle In Cell ◽  
Ion Thrusters

ABSTRACTCharge Exchange (CEX) ion is the main factor causing the plume pollution. The distribution of CEX ions is determined by the distribution of beam ions and neutral atoms. Hence, the primary problem in the study of the plume is how to accurately simulate the distribution of beam ions and neutral atoms. At present, the most commonly used model utilised for the plume simulation is the analytical model proposed by Roy for the plume simulation of the NASA Solar Technology Application Readiness (NSTAR) ion thruster. However, this analytical model can only be applied to the ion beam with small divergence angles. In addition, the analytical model is no longer applicable to the simulation for the plume of a new type of ion thruster that appeared recently, which is called the annular ion thruster. In this paper, a 3D particle model is proposed for the plume simulation of ion thrusters consisting of the particle model for beam ions, the Direct Simulation Monte Carlo (DSMC) model for neutral atoms and the Immersed Finite Element-Particle In Cell-Monte Carlo Collision (IFE-PIC-MCC) model for CEX ions. Then, the plume of the NSTAR ion thruster is simulated by both Roy's model and the 3D particle model. The simulation results of both models are then compared with the experimental results. It is shown that the numerical results of the 3D particle model agree well with those of the analytical model and the experimental data. And this 3D particle model can also be used for other electric thrusters.

Sign in / Sign up

Export Citation Format

Share Document