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Lu ZHANG, Liling LI, Zhiwei LIN, Yunsong DONG, Longfei JING, Jianhua ZHENG, Longyu KUANG, Hang LI, Jinhua ZHENG, Jiyan ZHANG, Tianming SONG, Zhiyu ZHANG, Yang ZHAO, Gao NIU, Dong YANG, Jiamin YANG, Yongkun DING. Tamping the movement of the laser absorption cutoff position using gold foam hohlraum[J]. Plasma Science and Technology, 2024, 26(5): 055201. DOI: 10.1088/2058-6272/ad1f42
Citation: Lu ZHANG, Liling LI, Zhiwei LIN, Yunsong DONG, Longfei JING, Jianhua ZHENG, Longyu KUANG, Hang LI, Jinhua ZHENG, Jiyan ZHANG, Tianming SONG, Zhiyu ZHANG, Yang ZHAO, Gao NIU, Dong YANG, Jiamin YANG, Yongkun DING. Tamping the movement of the laser absorption cutoff position using gold foam hohlraum[J]. Plasma Science and Technology, 2024, 26(5): 055201. DOI: 10.1088/2058-6272/ad1f42

Tamping the movement of the laser absorption cutoff position using gold foam hohlraum

  • In indirect-driven laser fusion experiments, the movement of the laser absorption layer will distort the radiation uniformity on the capsule. The gold foam has advantages in symmetry control and lowering wall plasma blowoff when used in an inertial confinement fusion (ICF) hohlraum. This work investigates the motion of the laser absorption cutoff position using low-density foam gold walls. It is found that the motion of the laser absorption cutoff position can be significantly mitigated through optimal initial low density, tailored to a specific laser shape. For a short square laser pulse, the laser absorption cutoff position remains almost stationary at an initial density of approximately 0.6 g cm−3. For a long-shaped laser pulse, the minimal motion of the laser absorption cutoff position is observed at an initial density of about 0.1 g cm−3. This approach allows for the adjustment of the symmetry of the hohlraum radiation source. The insights gained from this study serve as a crucial reference for optimizing the hohlraum wall density.
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