A high-power pulsed laser is focused onto a solid-hydrogen target to accelerate forward a collimated stream of protons in the range 0.1–1?MeV, carrying a very high energy of about 30?J ( ～ 5 % laser-ion conversion efficiency) and extremely large charge of about ～ 0.1 mC per laser pulse. This result is achieved for the first time through the combination of a sophisticated target system ( H 2 thin ribbon) operating at cryogenic temperature ( ～ 10 K ) and a very hot H plasma ( ～ 300 keV “hot electron” temperature) generated by a subnanosecond laser with an intensity of ～ 3 × 10 16 W / cm 2 . Both the H plasma and the accelerated proton beam are fully characterized by in?situ and ex?situ diagnostics. Results obtained using the ELISE (experiments on laser interaction with solid hydrogen) H 2 target delivery system at PALS (Prague) kJ-class laser facility are presented and discussed along with potential multidisciplinary applications.
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机译：高功率脉冲激光聚焦到固 - 氢靶上，以加速在0.1-1〜1的范围内的固定物质的准直的质子流，承载大约30μm的非常高（激光离子转换效率）每个激光脉冲的大约约0.1mc的极大电荷。该结果是首次通过在低温温度（〜10 k）的复杂的目标系统（H 2薄带）的组合来实现，并且由A产生的非常热的H等离子体（〜300keV“热电子”温度）的组合来实现亚基癸辛激光强度为〜3×10 16 W / cm 2。 H等离子体和加速质子束都充分地表征了？原位和前线诊断。使用ELISE获得的结果（与固体氢气的激光相互作用的实验）H 2靶输送系统在PALS（布拉格）KJ-Class激光设施中呈现和讨论，以及潜在的多学科应用。
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