Analyzing implosion symmetry based on fringe shifts of wide-angle velocity interferometer system for any reflector

Wu Yuji; Zhang Qing; Wang Feng; Li Yulong

doi:10.11884/HPLPB202234.220238

Volume 34 Issue 12

Nov. 2022

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Wu Yuji, Zhang Qing, Wang Feng, et al. Analyzing implosion symmetry based on fringe shifts of wide-angle velocity interferometer system for any reflector[J]. High Power Laser and Particle Beams, 2022, 34: 122002. doi: 10.11884/HPLPB202234.220238

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Analyzing implosion symmetry based on fringe shifts of wide-angle velocity interferometer system for any reflector

doi: 10.11884/HPLPB202234.220238

Wu Yuji^1
,,
Zhang Qing¹,
Wang Feng^{2
,
,},
Li Yulong²

1.
School of Nuclear Engineering, Rocket Force University of Engineering, Xi’an 710025, China
2.
Laser Fusion Research Center, CAEP, P. O. Box 919-988, Mianyang 621900, China

Received Date: 2022-08-03
Rev Recd Date: 2022-08-23

Available Online: 2022-11-02

Publish Date: 2022-11-02

Abstract

Abstract

A recording design of wide-angle velocity interferometer system for any reflector (VISAR) fringe that loading shaped optical fiber panel or ring-to-line fiber bundle in front of the streak camera is presented, and the coordinates of recording position are located at a certain circle on pellet. To realize implosion symmetry analysis, the phase of wide-angle VISAR fringes is obtained by using coordinate transformation, Fourier transformation and Legendre expansion, and its feasibility is verified by examples. The diagnostic characteristics, optical design, equipment development and data processing of the method are discussed, and the development direction of implosion symmetry diagnosis based on wide-angle VISAR is introduced. Using this method to record and analyze the wide-angle VISAR fringe data can make implosion symmetry diagnosis accurate, intuitive and vivid, and can provide support for studying laser plasma instability and fluid instability in inertial confinement fusion research.
- velocity interferometer system for any reflector,
- wide-angle diagnosis,
- implosion symmetry,
- Legendre expansion,
- inertial confinement fusion

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References

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