http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Eisuke Miura,Shin-ichi Masuda,Takanori Ooyama,Satoshi Ishii 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.56 No.1
The generation of quasi-monoenergetic electron beams containing more than 3 × 108 electrons in a monoenergetic peak for energies from 40 to 60 MeV has been demonstrated. The quasimonoenergetic electron beams have been obtained from a plasma with an electron density of 1.6 × 1019 cm−3 produced by an 8-TW, 50-fs Ti:sapphire laser pulse. It is necessary to control the plasma density precisely and to suppress the nanosecond prepulse with the main pulse for stable generation of quasi-monoenergetic beams. Two-dimensional particle-in-cell simulation results are also shown. The simulation result suggests that quasi-monoenergetic beam generation is brought about by matching the laser propagation length with the gas jet length.