在球体冲击驱动的爆炸中,有非马克斯韦尔式离子速度分布的证据
O M Mannion1, W T Taitano2, B D Appelbe3
1Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.
Physical review. E
|October 18, 2023
概括
聚变中子的测量揭示了激光驱动的爆炸中非马克斯韦尔式离子速度分布. 更高的温度需要先进的Vlasov-Fokker-Planck模拟,而不是简单的水力动力学模型,以进行精确的等离子体分析.
科学领域:
- 血物理学的等离子体物理学
- 核聚变科学是核聚变的科学.
- 高能量密度物理学 高能量密度物理学
背景情况:
- 热核等离子体是使用球形激光直接驱动的爆破产生的.
- 离子速度分布函数对于理解等离子体行为至关重要.
研究的目的:
- 为了研究激光驱动的爆破等离子体中的离子速度分布函数.
- 将实验测量与理论等离子体模型进行比较.
主要方法:
- 分析-三 (DT) 和- (DD) 聚变中子能光谱.
- 使用水力动力学马克斯韦尔和弗拉索夫-福克-普朗克 (VFP) 等离子体模型.
主要成果:
- 一个水力动力学马克斯韦尔模型充分描述了低温等离子体 (<10 keV).
- 这种模型对于高温,运动性等离子体是失败的.
- 实验数据与预测高温下双模态离子速度分布的VFP模拟相一致.
结论:
- 直接的实验证据证实,在球体冲击驱动的爆炸中,非马克斯韦尔式的离子速度分布.
- 动态VFP模拟对于准确建模高温聚变等离子体至关重要.
- 这些发现为基准测试动力模拟提供了关键数据.
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