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arXiv 1507.04511physics.plasm-phnucl-exphysics.acc-ph
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laser加速轻离子驱动的中子束发射

Beamed neutron emission driven by laser accelerated light ions

S. Kar, A. Green, H. Ahmed, A. Alejo, A. P. L. Robinson, M. Cerchez, R. Clarke, D. Doria, S. Dorkings, J. Fernandez, S. R. Mirfyazi, P. McKenna, K. Naughton, D.… 展开作者

S. Kar, A. Green, H. Ahmed, A. Alejo, A. P. L. Robinson, M. Cerchez, R. Clarke, D. Doria, S. Dorkings, J. Fernandez, S. R. Mirfyazi, P. McKenna, K. Naughton, D. Neely, P. Norreys, C. Peth, H. Powell, J. A. Ruiz, J. Swain, O. Willi, M. Borghesi

摘要:

本文报道了在强激光驱动下,利用MeV离子,在一个捕集器-捕集器方案中,从轻核反应中观测到峰值通量为10^9 n/sr的类束中子辐射。的中子束的空间分布,完全捕获的第一次通过采用CR 39核径迹探测器,示出了一个半高宽发散角为70度,与峰值通量近一个数量级高于各向同性组件的其他地方。所观察到的中子束流对于广泛的应用是非常有利的,并且确实对于进一步传输和缓和到热能是非常有利的。采用不同的捕集器-捕集器材料组合进行的系统研究表明,主要的反应是d(p,n+p)^1H和d(d,n)^3He。尽管没有足够的截面数据可用于建模,但在中子的空间和光谱分布中观察到的各向异性最有可能与射弹离子的方向性和高能量有关。

英文摘要:

We report on the experimental observation of beam-like neutron emission with peak flux of the order of 10^9 n/sr, from light nuclei reactions in a pitcher-catcher scenario, by employing MeV ions driven by high power laser. The spatial profile of the neutron beam, fully captured for the first time by employing a CR39 nuclear track detector, shows a FWHM divergence angle of 70 degrees, with a peak flux nearly an order of magnitude higher than the isotropic component elsewhere. The observed beamed flux of neutrons is highly favourable for a wide range of applications, and indeed for further transport and moderation to thermal energies. A systematic study employing various combinations of pitcher-catcher materials indicates the dominant reactions being d(p, n+p)^1H and d(d,n)^3He. Albeit insufficient cross-section data are available for modelling, the observed anisotropy in the neutrons' spatial and spectral profiles are most likely related to the directionality and high energy of the projectile ions.

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。

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