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Numerical Simulation of the SGEMP Inside a Target Chamber of a Laser Inertial Confinement Facility.

Authors :
Cui, Meng
Zhiqian, Xu
Yunsheng, Jiang
Wanguo, Zheng
Zhao, Dang
Source :
IEEE Transactions on Nuclear Science. Oct2017, Vol. 64 Issue 10, p2618-2625. 8p.
Publication Year :
2017

Abstract

After X-ray irradiate a metal cavity, a large number of photoelectrons are emitted into the internal space, thereby producing a very strong system-generated electromagnetic pulse (SGEMP). The X-ray environment inside a laser inertial confinement device is very complex. Even if the diagnostic equipment working inside the target chamber has a good electromagnetic shielding capability, it would still face severe SGEMP interference. In this paper, the X-ray environments inside target chambers of National Ignition Facility, optimized method for estimated guidance accuracy (OMEGA), and Shenguang-III (SG-III) facility were obtained through a survey of the literature. In light of the survey results, the time-biased finite-difference time-domain method and the particle-in-cell method were used to numerically simulate SGEMP inside a 2-D cylindrical cavity model. Besides, the relationships between the SGEMP in the cavity and parameters such as X-ray fluence, energy spectrum, pulsewidth, and spatial size of the model were studied. The fluence and pulsewidth of the X-ray were found to have a more significant effect on the time-domain waveform of the electromagnetic field. Finally, based on the calculation results, the SGEMP of the SG-III facility in the target chamber was calculated to approximately be 0.75 MV/m. [ABSTRACT FROM PUBLISHER]

Details

Language :
English
ISSN :
00189499
Volume :
64
Issue :
10
Database :
Academic Search Index
Journal :
IEEE Transactions on Nuclear Science
Publication Type :
Academic Journal
Accession number :
125813438
Full Text :
https://doi.org/10.1109/TNS.2017.2740930