共 33 条
Direct observation of particles with energy >10 MeV/u from laser-induced processes with energy gain in ultra-dense deuterium
被引:21
作者:
Holmlid, Leif
[1
]
机构:
[1] Univ Gothenburg, Dept Chem & Mol Biol, SE-41296 Gothenburg, Sweden
关键词:
Laser-induced fusion;
MeV particles;
Ultra-dense deuterium;
SECONDARY-ELECTRON YIELD;
COULOMB EXPLOSIONS;
RYDBERG MATTER;
NUCLEAR-REACTIONS;
CLUSTERS;
FUSION;
D(-1);
EMISSION;
IGNITION;
CATALYST;
D O I:
10.1017/S0263034613000414
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
Nuclear fusion in ultra-dense deuterium D(-1) was reported previously to be induced by 0.2 J pulses with 5 ns pulse length, ejecting particles with energies in the MeV range. The ns-resolved signal from D(-1) to two in-line collectors at up to 1 m distance can be observed directly on an oscilloscope, showing particles with energies in the range 1-20 MeV u(-1). They are probably mainly protons and deuterons in the form of neutral ultra-dense hydrogen H(-1) fragments. Electrons and photons give only small contributions to the fast signal. The observed signal at several mA peak current corresponds to 1 x 10(13) particles released per laser shot and to an energy release >4 J assuming isotropic formation and average particle energy of 3 MeV. This corresponds to an energy gain of 30 in the process. A movable slit close to the laser target gives lateral resolution of the signal generation, showing almost only fast particles from the point of laser impact and penetrating photons from the plasma outside the laser impact point. The observation of multi-MeV particles indicates nuclear fusion, either as a source or as a result.
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页码:715 / 722
页数:8
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