Interaction of intense laser pulses with hydrogen atomic clusters |
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Authors: | Du Hong-Chuan Wang Hui-Qiao Liu Zuo-Ye Sun Shao-Hu Li Lu Ma Ling-Ling and Hu Bi-Tao |
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Institution: | School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China; Institute of Theoretical Physics, Lanzhou University, Lanzhou 730000, China |
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Abstract: | The interaction between intense femtosecond laser pulses
and hydrogen atomic clusters is studied by a simplified Coulomb
explosion model. The dependences of average proton kinetic energy on
cluster size, pulse duration, laser intensity and wavelength are
studied respectively. The calculated results indicate that the
irradiation of a femtosecond laser of longer wavelength on hydrogen
atomic clusters may be a simple, economical way to produce highly
kinetic hydrogen ions. The phenomenon suggests that the irradiation
of femtosecond laser of longer wavelength on deuterium atomic
clusters may be easier than that of shorter wavelength to drive
nuclear fusion reactions. The product of the laser intensity and the
squared laser wavelength needed to make proton energy saturated as a
function of the squared cluster radius is also investigated. The
proton energy distribution calculated is also shown and compared
with the experimental data. Our results are in agreement with the
experimental results fairly well. |
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Keywords: | femtosecond laser pulse Coulomb explosion hydrogen
atomic cluster |
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