| 超热电子的产生与输运背向辐射的实验研究 |
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| 引用本文： | 马春生,王光昶.超热电子的产生与输运背向辐射的实验研究[J].思茅师范高等专科学校学报,2010,26(6):25-28. |
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| 作者姓名： | 马春生 王光昶 |
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| 作者单位： | [1]思茅师范高等专科学校计算机科学系,云南普洱665000 [2]成都医学院物理教研室,四川成都610081 |
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| 摘 要： | 报道了在20TW fs激光器上,采用电子磁谱仪和光学CCD积分成像相机,分别对激光-固体靶的相互作用,在靶背方向产生的超热电子能谱及其光学渡越辐射进行的测量。能谱测量结果显示：超热电子能谱呈双温类-麦克斯韦分布,拟合的温度分别为90keV和280keV,平均温度为185keV,这与已知的温度定标率较好地吻合;光学渡越辐射测量结果显示：光学渡越辐射是由于超热电子输运穿越固体靶所致,而辐射区域呈圆盘状、有发散角、有光强分布;如果考虑超热电子的产生和加热机制,则占主导地位的加热机制是共振吸收对电子的加热。
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| 关 键 词： | fs激光 固体靶 超热电子 能谱 光学渡越辐射 |
A Measurement of Hot Electrons Generation and Transport in Targets at the Rear-side Radiation |
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| MA Chun-sheng,WANG Guang-chang.A Measurement of Hot Electrons Generation and Transport in Targets at the Rear-side Radiation[J].Journal of Simao Teachers' College,2010,26(6):25-28. |
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| Authors: | MA Chun-sheng WANG Guang-chang |
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| Institution: | 1.Departmant of Computer Science,Simao Teachers,College,Yunnan Simao 665000,China;2.Teaching and Research Section of Physics,Chengdu Medical College,Chengdu 610081,China.) |
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| Abstract: | This paper reports hot electron energy spectrum measured with electron spectrometer,and Optical Transition Radiation measured with optical time-integrated image of CCD during the interaction of laser-solid target in targets at the rear-side radiation of laser on 20 Terawatt femtosecond laser facility.It shows that hot electron energy spectrum fitted with two-temperature like-Maxwellian distribution,with temperature of hot electrons T 90keV and T 280keV,but average temperature of hot electrons T 185keV,which accorded with the known temperature scaling law.Due Optical Transition Radiation is produced by the hot electrons transport through solid targets,region of Optical Transition Radiation is have lager radiation angle and optical intensity distribution.If considering the generated and acceleration mechanism of hot electrons,the main acceleration of hot electron comes from resonance absorption. |
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| Keywords: | Femtosecond laser Solid targets Hot electron Energy spectrum Optical Transition Radiation |
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