Numerical study of neutron beam divergence in a beam-fusion scenario employing laser driven ions
Numerical study of neutron beam divergence in a beam-fusion scenario employing laser driven ions
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使用激光驱动离子的束聚变场景中中子束发散的数值研究
DOI:
10.1016/j.nima.2016.05.057
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Alejo A
中科院分区:
文献类型:
--
作者:
Alejo A
The most established route to create a laser-based neutron source is by employing laser accelerated, low atomic-number ions in fusion reactions. In addition to the high reaction cross-sections at moderate energies of the projectile ions, the anisotropy in neutron emission is another important feature of beam-fusion reactions. Using a simple numerical model based on neutron generation in a pitcher–catcher scenario, anisotropy in neutron emission was studied for the deuterium–deuterium fusion reaction. Simulation results are consistent with the narrow-divergence (∼ 70° full width at half maximum) neutron beam recently served in an experiment employing multi-MeV deuteron beams of narrow divergence (up to 30° FWHM, depending on the ion energy) accelerated by a sub-petawatt laser pulse from thin deuterated plastic foils via the Target Normal Sheath Acceleration mechanism. By varying the input ion beam parameters, simulations show that a further improvement in the neutron beam directionality (ie reduction in the beam divergence) can be obtained by increasing the projectile ion beam temperature and cut-off energy, as expected from interactions employing higher power lasers at upcoming facilities.
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影响因子:
19.7
作者:
R. Stone;J. C. Larkin
通讯作者:
J. C. Larkin
DOI:
10.1393/ncc/i2015-15188-8
发表时间:
2016
期刊:
Il Nuovo Cimento C
影响因子:
--
作者:
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8.6
作者:
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影响因子:
56.9
作者:
Toncian, T;Borghesi, M;Willi, O
通讯作者:
Willi, O