Repetitive Solid Spherical Pellet Injection and Irradiation toward the Repetitive-mode Fast-Ignition Fusion mini-Reactor CANDY.
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Authors
Hanayama, Ryohei
Komeda, Osamu
Nishimura, Yasuhiko
Mori, Yoshitaka
Ishii, Katsuhiro
Nakayama, Suisei
Okihara, Shinichiro
Fujita, Kazuhisa
Sekine, Takashi
Sato, Nakahiro
Issue Date
2016
Type
Article
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Abstract
Pellet injection and repetitive laser illumination are key technologies for realizing inertial fusion energy[1-4]. Neutron generator using lasers also requires a repeating pellet target supplier. Here we present the first demonstration of target injection and neutron generation[5]. We injected more than 1300 spherical deuterated polystyrene(C8D8) bead pellet targets during 23 minutes at 1 Hz(Fig. 1). After the pellet targets fell for a distance of 18 cm, we applied the synchronized laser-diode-pumped ultra-intense laser HAMA. The laser intensity at the focal point is 5 x 10(18) W/cm(2), which is high enough to generate neutrons. As a result of the irradiation, we produced 2.45-MeV DD neutrons. Figure 2 shows the neutron time-of-flight signals detected by plastic scintillators coupled to photomultipliers. The neutron energy was calculated by the time-of-flight method. The maximum neutron yield was 9.5 x 10(4)/4 pi sr. The result is a step toward fusion power and also suggests possible industrial neutron sources.
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Citation
Ryohei HANAYAMA et al 2016 J. Phys.: Conf. Ser. 688 012026
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Creative Commons Attribution 3.0 Unported
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ISSN
1742-6588