Interaction of intense laser pulses with hydrogen atomic clusters

doi:10.1088/1674-1056/19/3/035202

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.

Keywords: femtosecond laser pulse Coulomb explosion hydrogen atomic cluster

Received: 06 May 2009
Revised: 24 July 2009
Accepted manuscript online:

PACS:	36.40.Wa	(Charged clusters)
	33.80.-b	(Photon interactions with molecules)
	42.60.Jf	(Beam characteristics: profile, intensity, and power; spatial pattern formation)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos.~10575046 and 10775062).

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Du Hong-Chuan(杜洪川), Wang Hui-Qiao(王慧巧), Liu Zuo-Ye(刘作业), Sun Shao-Hua(孙少华), Li Lu(李露), Ma Ling-Ling(马玲玲), and Hu Bi-Tao(胡碧涛) Interaction of intense laser pulses with hydrogen atomic clusters 2010 Chin. Phys. B 19 035202

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Interaction of intense laser pulses with hydrogen atomic clusters

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