Three-dimensional PIC Simulation of Three-grid Ion Thruster Optics SystemChinese Full Text
CHEN Maolin;XIA Guangqing;YANG Zhengyan;ZHANG Bin;XU Zongqi;MAO Genwang;Science and Technology on Combustion, Internal Flow and Thermo-Structure Laboratory, Northwestern Polytechnical University;State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology;The Ninth System Design Department of China Aerospace Science and Industry Corporation;
Abstract: To optimize the optics systems of ion thrusters, we simulated a plasma transport process in three-grid system using the 3-D particle in cell（PIC） method, compared the results with the simulation of two-grid systems, and discussed the impact of decelerator grid on the ion distribution, electron reflux threshold, cut-off current threshold, crossover current threshold, ion through rate, and divergence loss. Based on the results, the main effects of introducing decelerator grid into the system were summarized. It is found that introducing decelerator grid does not affect the ion rate but affects the cut-off current, and it greatly reduces or even eliminates the limitation of cross current. Moreover, introducing decelerator grid inhibits the corrosion of accelerator grid through reducing the current in accelerator grid current in operating range by about 50%, and greatly enhances the radial electric field of downstream, which makes ions to deviate from the main beam region and hence lead to a higher divergence loss. Therefore, the potential distribution around the accelerator grid hole is improved and the electron backstream threshold is remarkably affected: for a beam current of 1~4 A, a negative bias voltage of only-60-50 V can realize the suppression of electron backstream.
- DOI：
10.13336/j.1003-6520.hve.2014.10.010
- Series：
- Subject：
- Classification Code：
V439.2
- Mobile Reading
Read on your phone instantly
Step 1Scan QR Codes
"Mobile CNKI-CNKI Express" App
Step 2Open“CNKI Express”
and click the scan icon in the upper left corner of the homepage.
Step 3
Scan QR Codes
Read this article on your phone.
- CAJ Download
- PDF Download
Download the mobile appuse the app to scan this coderead the article.
Tips: Please download CAJViewer to view CAJ format full text.
Download: 218 Page: 3012-3017 Pagecount: 6 Size: 420K
Citation Network
Related Literature
- Similar Article
- Reader Recommendation
- Associated Author