Experimental study on the hydrodynamic instability of the decelerated inner interface in indirect-driven cylindrical implosions

Tu Shaoyong; Jiang Wei; Yin Chuansheng; Yu Chengxin; Fan Zhengfeng; Yuan Yongteng; Pu Yudong; Miao Wenyong; Hu Xin; Li Jin; Yang Yimeng; Che Xingsen; Dong Yunsong; Yang Dong; Yang Jiamin

doi:10.11884/HPLPB202436.240379

Volume 36 Issue 12

Nov. 2024

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Tu Shaoyong, Jiang Wei, Yin Chuansheng, et al. Experimental study on the hydrodynamic instability of the decelerated inner interface in indirect-driven cylindrical implosions[J]. High Power Laser and Particle Beams, 2024, 36: 122001. doi: 10.11884/HPLPB202436.240379

Citation:

Tu Shaoyong, Jiang Wei, Yin Chuansheng, et al. Experimental study on the hydrodynamic instability of the decelerated inner interface in indirect-driven cylindrical implosions[J]. High Power Laser and Particle Beams, 2024, 36: 122001. doi: 10.11884/HPLPB202436.240379

Citation:

Tu Shaoyong, Jiang Wei, Yin Chuansheng, et al. Experimental study on the hydrodynamic instability of the decelerated inner interface in indirect-driven cylindrical implosions[J]. High Power Laser and Particle Beams, 2024, 36: 122001. doi: 10.11884/HPLPB202436.240379

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Experimental study on the hydrodynamic instability of the decelerated inner interface in indirect-driven cylindrical implosions

doi: 10.11884/HPLPB202436.240379

1.
Laser Fusion Research Center, CAEP, Mianyang 621900, China
2.
Institute of Applied Physics and Computational Mathematics, Beijing 100094, China

Received Date: 2024-10-08
Accepted Date: 2024-11-04
Rev Recd Date: 2024-11-15

Available Online: 2024-11-07

Publish Date: 2024-11-08

Abstract

Abstract

The investigation of hydrodynamic instability growth in convergent geometry is crucial for optimizing the design of inertial confinement fusion capsules, which aims to mitigate the growth of hydrodynamic instability and mixing. Experiments about the hydrodynamic instability of the decelerated inner interface in radiation-driven cylindrical implosions were conducted at 100 kJ laser facility. Mode coupling of perturbations and the Bell-Plesset (BP) effect unique to convergent geometry were observed. The theoretical predictions of the growth induced by the BP effect are consistent with the experimental results. Additionally, these experiments identified a second-order mode introduced by an M2 drive asymmetry. The drive asymmetry is about 11%. To mitigate the drive asymmetry, a method of extending the length of the hohlraum was proposed. Researches of the hydrodynamic instability in cylindrical geometry contribute to a better understanding of how convergent geometry affects hydrodynamic instability growth at high energy density, thereby aiding in optimizing the design of inertial confinement fusion capsules.
- cylindrical implosions,
- deceleration,
- hydrodynamic instability,
- indirect-driven,
- inertial confinement fusion

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References(32)

References

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