arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2412.03362physics.plasm-ph
收藏

激光直接驱动惯性约束聚变内爆的带电粒子图像中的畸变

Distortions in Charged-Particle Images of Laser Direct-Drive Inertial Confinement Fusion Implosions

P. V. Heuer, J. L. Peebles, J. Kunimune, H. G. Rinderknecht, J. R. Davies, V. Gopalaswamy, J. Frelier, M. Scott, J. Roberts, B. Brannon, H. McClow, R. Fairbanks… 展开作者

P. V. Heuer, J. L. Peebles, J. Kunimune, H. G. Rinderknecht, J. R. Davies, V. Gopalaswamy, J. Frelier, M. Scott, J. Roberts, B. Brannon, H. McClow, R. Fairbanks, S. P. Regan, J. A. Frenje, M. Gatu Johnson, F. H. Séguin, A. J. Crilly, B. D. Appelbe, M. Farrell, J. Stutz

AI总结:

本文研究了ICF内爆带电粒子图像畸变问题,提出丝状场散射模型并通过粒子追踪合成数据验证其最佳匹配观测畸变,同时探讨了该机制对其他诊断的影响。

摘要:

惯性约束聚变(ICF)内爆产生的高能带电粒子,编码了聚变反应峰值期间热点和致密燃料空间形态的信息。Knock-on deutron imager(KoDI)在Omega Laser Facility开发,用于对这些粒子成像,以诊断低温氘-氚ICF内爆热点和致密燃料层的低模不对称性。然而,收集到的图像在多个方面发生畸变,阻碍了氘源的重构。本文描述了这些畸变及一系列缓解或补偿它们的尝试。我们提出了几种畸变的潜在机制,包括一个关于内爆周围丝状电场或磁场中带电粒子散射的新模型。利用粒子追踪,基于丝状场模型生成了合成KoDI数据,该数据重现了主要实验观察到的图像畸变。我们得出结论,丝状散射模型最符合观察到的图像畸变。最后,我们讨论了丝状场对其他带电粒子诊断的潜在影响。

英文摘要:

Energetic charged particles generated by inertial confinement fusion (ICF) implosions encode information about the spatial morphology of the hot-spot and dense fuel during the time of peak fusion reactions. The knock-on deuteron imager (KoDI) was developed at the Omega Laser Facility to image these particles in order to diagnose low-mode asymmetries in the hot-spot and dense fuel layer of cryogenic deuterium--tritium ICF implosions. However, the images collected are distorted in several ways that prevent reconstruction of the deuteron source. In this paper we describe these distortions and a series of attempts to mitigate or compensate for them. We present several potential mechanisms for the distortions, including a new model for scattering of charged particles in filamentary electric or magnetic fields surrounding the implosion. Particle-tracing is used to create synthetic KoDI data based on the filamentary field model that reproduces the main experimentally observed image distortions. We conclude that the filamentary scattering model best matches the observed image distortions. Finally, we discuss potential impacts of filamentary fields on other charged-particle diagnostics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑