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Proceedings Paper

Numerical simulation of the influence of cylindric electrode length on double-probe spaceborne electric field sensor
Author(s): Xian-xiang Chen; Ji Yang; Ren Ren; Dong-min Fang; Shan-hong Xia
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Paper Abstract

Double-probe spaceborne electric field sensor (DSEFS) was used to detect the ionospheric electric field abnormal of earthquake precursor. The DSEFS is comprised of four probes and four booms outside the satellite and one signal acquisition and processing system inside the satellite. Four cylindric electrodes called C2 of the probes were used to connect the booms and the probes. The length of C2 is one of the most important geometric parameter need to be optimized to ensure the detecting precision of DSEFS. In order to understand the operation of the electric field probes and optimize its performance, Spacecraft Plasma Interaction System (SPIS) software and DEMETER detected data were used to study the influence of C2 length on the DSEFS detection precision. The simulation results showed that when the C2 length is bigger than 2 Debye lengths, the influence of the boom potential had almost no disturbance on the DSEFS probes. In the case of short C2 length, when the boom had a potential which is positive with respect to the probes, the local electric field between the boom and the probe was the dominant factor, the probe collected currents monotonously increased with the increasing of C2 length. When the boom has a negative potential with respect to the probe, the probe collected current did not monotonously increased with the increasing of C2 length, when the length of C2 is relatively short (less than 20cm), the effect of boom sheath was the dominant factor, the probe collected current increased with the increasing of C2 length; when the length of C2 is larger than 20cm, the local electric field became the dominant factor, the probed colleted current decreased with the increasing of C2 length. The computer simulation result provided good guidance on optimization design of the C2 length of DSEFS.

Paper Details

Date Published: 16 August 2011
PDF: 7 pages
Proc. SPIE 8196, International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, 81960J (16 August 2011); doi: 10.1117/12.899583
Show Author Affiliations
Xian-xiang Chen, Institute of Electronics (China)
Ji Yang, China Academy of Engineering Physics (China)
Ren Ren, Institute of Electronics (China)
Dong-min Fang, Institute of Electronics (China)
Shan-hong Xia, Institute of Electronics (China)


Published in SPIE Proceedings Vol. 8196:
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications

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