First demonstration of laser engagement of 1-Hz-injected flying pellets and neutron generation.

First demonstration of laser engagement of 1-Hz-injected flying pellets and neutron generation.
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DOI:
10.1038/srep02561
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Miura, Eisuke
Miura, Eisuke
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Komeda, Osamu;Nishimura, Yasuhiko;Mori, Yoshitaka;Hanayama, Ryohei;Ishii, Katsuhiro;Nakayama, Suisei;Kitagawa, Yoneyoshi;Sekine, Takashi;Sato, Nakahiro;Kurita, Takashi;Kawashima, Toshiyuki;Kan, Hirofumi;Nakamura, Naoki;Kondo, Takuya;Fujine, Manabu;Azuma, Hirozumi;Motohiro, Tomoyoshi;Hioki, Tatsumi;Kakeno, Mitsutaka;Sunahara, Atsushi;Sentoku, Yasuhiko;Miura, Eisuke

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颗粒注入和重复激光照明是实现惯性聚变能的关键技术。人们对目标供应商、注射器和飞行颗粒接合的跟踪系统进行了大量研究。在这里,我们首次演示了颗粒注射、反激光束的接合和中子的产生。氘化聚苯乙烯 (CD) 珠粒在 1 Hz 下自由落体 18 cm 的距离后,成功地与来自二极管泵浦超强激光 HAMA 的两束反激光束接合。激光能量、脉冲持续时间、波长和强度分别为每束 0.63 J、104 fs 和 811 nm、4.7 × 1018 W/cm2。辐照弹丸产生 D(d,n)3He 反应中子,最大产量为 9.5 × 104/4π sr/shot。此外,还发现激光通过1毫米直径的珠子钻出一条直径为10 μm的直通道。结果表明了下一步实现惯性聚变能的潜在有用技术和发现。
Pellet injection and repetitive laser illumination are key technologies for realizing inertial fusion energy. Numerous studies have been conducted on target suppliers, injectors, and tracking systems for flying pellet engagement. Here we for the first time demonstrate the pellet injection, counter laser beams' engagement and neutron generation. Deuterated polystyrene (CD) bead pellets, after free-falling for a distance of 18 cm at 1 Hz, are successfully engaged by two counter laser beams from a diode-pumped, ultra-intense laser HAMA. The laser energy, pulse duration, wavelength, and the intensity are 0.63 J per beam, 104 fs, and 811 nm, 4.7 × 1018 W/cm2, respectively. The irradiated pellets produce D(d,n)3He-reacted neutrons with a maximum yield of 9.5 × 104/4π sr/shot. Moreover, the laser is found out to bore a straight channel with 10 μm-diameter through the 1-mm-diameter beads. The results indicate potentially useful technologies and findings for the next step in realizing inertial fusion energy.
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