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