Non-equilibrium between ions and electrons inside hot spots from National Ignition Facility experiments

Fan Zhengfeng; Liu Yuanyuan; Liu Bin; Yu Chengxin; Lan Ke; Liu Jie

doi:10.1016/j.mre.2016.11.003

Volume 2 Issue 1

Jan. 2017

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Fan Zhengfeng, Liu Yuanyuan, Liu Bin, Yu Chengxin, Lan Ke, Liu Jie. Non-equilibrium between ions and electrons inside hot spots from National Ignition Facility experiments[J]. Matter and Radiation at Extremes, 2017, 2(1). doi: 10.1016/j.mre.2016.11.003

Citation:

Fan Zhengfeng, Liu Yuanyuan, Liu Bin, Yu Chengxin, Lan Ke, Liu Jie. Non-equilibrium between ions and electrons inside hot spots from National Ignition Facility experiments[J]. Matter and Radiation at Extremes, 2017, 2(1). doi: 10.1016/j.mre.2016.11.003

Citation:

Fan Zhengfeng, Liu Yuanyuan, Liu Bin, Yu Chengxin, Lan Ke, Liu Jie. Non-equilibrium between ions and electrons inside hot spots from National Ignition Facility experiments[J]. Matter and Radiation at Extremes, 2017, 2(1). doi: 10.1016/j.mre.2016.11.003

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Non-equilibrium between ions and electrons inside hot spots from National Ignition Facility experiments

doi: 10.1016/j.mre.2016.11.003

Fan Zhengfeng¹,
Liu Yuanyuan¹,
Liu Bin¹,
Yu Chengxin^{1
,
,},
Lan Ke¹,
Liu Jie^{1, 2}

1.
aInstitute of Applied Physics and Computational Mathematics, Beijing 100088, China
2.
bCenter for Applied Physics and Technology, Peking University, Beijing 100871, China

More Information

Corresponding author: *Corresponding author. E-mail address: cx_yu2013@163.com (C.X. Yu).
Received Date: 2016-08-22
Accepted Date: 2016-11-10

Available Online: 2021-12-07

Publish Date: 2017-01-15

Abstract

Abstract

The non-equilibrium between ions and electrons in the hot spot can relax the ignition conditions in inertial confinement fusion [Fan et al., Phys. Plasmas 23, 010703 (2016)], and obvious ion-electron non-equilibrium could be observed by our simulations of high-foot implosions when the ion-electron relaxation is enlarged by a factor of 2. On the other hand, in many shots of high-foot implosions on the National Ignition Facility, the observed X-ray enhancement factors due to ablator mixing into the hot spot are less than unity assuming electrons and ions have the same temperature [Meezan et al., Phys. Plasmas 22, 062703 (2015)], which is not self-consistent because it can lead to negative ablator mixing into the hot spot. Actually, this non-consistency implies ion-electron non-equilibrium within the hot spot. From our study, we can infer that ion-electron non-equilibrium exists in high-foot implosions and the ion temperature could be ∼9% larger than the equilibrium temperature in some NIF shots.
- Ion-electron non-equilibrium,
- Hot-spot ignition conditions relaxation,
- High-foot experiments

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References(22)

References

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