Abstract
Deep dielectric charging in ring structure irradiated by energetic electrons is one of the major factors causing spacecraft anomalies. In this paper, based on the physical processes of charge deposition, transport and accumulation, we establish a 2-D deep dielectric charging physical model of a ring structure consisting of insulating materials, electrodes and aluminum shield. Deep dielectric charging properties of insulating materials irradiated by electron energy spectra are simulated and analyzed under typical space environment and extreme space environment. Furthermore, the influences of aluminum shield, insulating material properties and thickness on deep dielectric charging are investigated. When the thickness of aluminum shield is larger than 3 mm, the maximum electron-beam density reduces to 10<sup>-10</sup> A/m<sup>2</sup>, which is so low that it can not induce high electric field within materials. Selected polyimide (PI), polytetrafluoroethylene (PTFE) and composite epoxy resin (FR4) as electrical insulating materials, space charge transport, accumulation and electric field in insulating material of the ring structure are analyzed. It is indicated that the maximum electric field obeys the sequence as follows: PTFE> FR4> PI. Finally, it is found that the electric field is obviously enhanced with the increasing thickness of insulating material. This work paves the way towards the mitigation of deep dielectric charging.
| Original language | English |
|---|---|
| Article number | 7179199 |
| Pages (from-to) | 2349-2358 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Dielectrics and Electrical Insulation |
| Volume | 22 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2015 Aug 1 |
| Externally published | Yes |
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Keywords
- 2-D electric field simulation
- Deep dielectric charging
- Energetic electron radiation
- Flux model for internal charging
ASJC Scopus subject areas
- Electrical and Electronic Engineering
Cite this
Deep dielectric charging characteristics of ring structure irradiated by energetic electrons. / Li, Guochang; Li, Shengtao; Min, Daomin; Zheng, Xiaoquan; Yang, Shengsheng; Tang, Daotan; Shi, Liang; Zhao, Chengxuan.
In: IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 22, No. 4, 7179199, 01.08.2015, p. 2349-2358.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Deep dielectric charging characteristics of ring structure irradiated by energetic electrons
AU - Li, Guochang
AU - Li, Shengtao
AU - Min, Daomin
AU - Zheng, Xiaoquan
AU - Yang, Shengsheng
AU - Tang, Daotan
AU - Shi, Liang
AU - Zhao, Chengxuan
PY - 2015/8/1
Y1 - 2015/8/1
N2 - Deep dielectric charging in ring structure irradiated by energetic electrons is one of the major factors causing spacecraft anomalies. In this paper, based on the physical processes of charge deposition, transport and accumulation, we establish a 2-D deep dielectric charging physical model of a ring structure consisting of insulating materials, electrodes and aluminum shield. Deep dielectric charging properties of insulating materials irradiated by electron energy spectra are simulated and analyzed under typical space environment and extreme space environment. Furthermore, the influences of aluminum shield, insulating material properties and thickness on deep dielectric charging are investigated. When the thickness of aluminum shield is larger than 3 mm, the maximum electron-beam density reduces to 10-10 A/m2, which is so low that it can not induce high electric field within materials. Selected polyimide (PI), polytetrafluoroethylene (PTFE) and composite epoxy resin (FR4) as electrical insulating materials, space charge transport, accumulation and electric field in insulating material of the ring structure are analyzed. It is indicated that the maximum electric field obeys the sequence as follows: PTFE> FR4> PI. Finally, it is found that the electric field is obviously enhanced with the increasing thickness of insulating material. This work paves the way towards the mitigation of deep dielectric charging.
AB - Deep dielectric charging in ring structure irradiated by energetic electrons is one of the major factors causing spacecraft anomalies. In this paper, based on the physical processes of charge deposition, transport and accumulation, we establish a 2-D deep dielectric charging physical model of a ring structure consisting of insulating materials, electrodes and aluminum shield. Deep dielectric charging properties of insulating materials irradiated by electron energy spectra are simulated and analyzed under typical space environment and extreme space environment. Furthermore, the influences of aluminum shield, insulating material properties and thickness on deep dielectric charging are investigated. When the thickness of aluminum shield is larger than 3 mm, the maximum electron-beam density reduces to 10-10 A/m2, which is so low that it can not induce high electric field within materials. Selected polyimide (PI), polytetrafluoroethylene (PTFE) and composite epoxy resin (FR4) as electrical insulating materials, space charge transport, accumulation and electric field in insulating material of the ring structure are analyzed. It is indicated that the maximum electric field obeys the sequence as follows: PTFE> FR4> PI. Finally, it is found that the electric field is obviously enhanced with the increasing thickness of insulating material. This work paves the way towards the mitigation of deep dielectric charging.
KW - 2-D electric field simulation
KW - Deep dielectric charging
KW - Energetic electron radiation
KW - Flux model for internal charging
UR - http://www.scopus.com/inward/record.url?scp=84939527607&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84939527607&partnerID=8YFLogxK
U2 - 10.1109/TDEI.2015.004840
DO - 10.1109/TDEI.2015.004840
M3 - Article
AN - SCOPUS:84939527607
VL - 22
SP - 2349
EP - 2358
JO - IEEE Transactions on Dielectrics and Electrical Insulation
JF - IEEE Transactions on Dielectrics and Electrical Insulation
SN - 1070-9878
IS - 4
M1 - 7179199
ER -