| Interactions of a Femtosecond Intense Laser with Rare Gas Clusters in a Dense Jet |
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| 作者姓名： | 李邵辉 王成 刘建胜 朱频频 王向欣 倪国权 李儒新 徐至展 |
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| 作者单位： | LaboratoryforHighIntensityOptics,ShanghaiInstituteofOpticsandFineMechanics,ChineseAcademyofSciences,Shanghai201800,China |
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| 基金项目： | the National Basic Research Special Foundation of China，国家自然科学基金 |
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| 摘 要： | A study on the interactions of high intensity (- 10^16 W/cm^2) femtosecond laser pulses with rare gas clusters in a dense jet is performed. Energy absorption by Ar and Xe clusters is measured and it can be as high as 90%. Very energetic ions produced in the laser interaction with a dense cluster jet are detected by time-of-flight spectrometry and the maximum ion energy of Xe is up to 1.3 MeV. The average ion energies are found to increase with increasing cluster size and get saturated gradually. The average ion energies also show a strong directionality and the average ion energy in the direction parallel to the laser polarization vector is 40% higher than that perpendicular to it. The findings are discussed in terms of a model of charge-dependent ion acceleration.
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| 关 键 词： | 原子团 毫微微秒激光器 高能离子 能量吸收 稀有气体 |
Interactions of a Femtosecond Intense Laser with Rare Gas Clusters in a Dense Jet |
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| Li Shaohui,Wang Cheng,Liu JianshengZhu Pinpin,Wang Xiangxin,Ni GuoquanLi Ruxin Xu ZhizhanLaboratory for High Intensity Optics.Interactions of a Femtosecond Intense Laser with Rare Gas Clusters in a Dense Jet[J].Plasma Science & Technology,2005,7(1):2684-2686. |
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| Authors: | Li Shaohui Wang Cheng Liu JianshengZhu Pinpin Wang Xiangxin Ni GuoquanLi Ruxin Xu ZhizhanLaboratory for High Intensity Optics |
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| Affiliation: | Li Shaohui,Wang Cheng,Liu JianshengZhu Pinpin,Wang Xiangxin,Ni GuoquanLi Ruxin Xu ZhizhanLaboratory for High Intensity Optics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China |
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| Abstract: | A study on the interactions of high intensity (～ 1016 W/cm2) femtosecond laser pulses with rare gas clusters in a dense jet is performed. Energy absorption by Ar and Xe clusters is measured and it can be as high as 90%. Very energetic ions produced in the laser interaction with a dense cluster jet are detected by time-of-flight spectrometry and the maximum ion energy of Xe is up to 1.3 MeV. The average ion energies a1e found to increase with increasing cluster size and get saturated gradually. The average ion energies also show a strong directionality and the average ion energy in the direction parallel to the laser polarization vector is 40% higher than that perpendicular to it. The findings are discussed in terms of a model of charge-dependent ion acceleration. |
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| Keywords: | atomic clusters femtosecond laser energy absorption high energy ions |
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