氩团簇高信噪比13—23nm软x射线辐射谱实验观察  

Soft-x-ray emission from Ar clusters irradiated by 150fs laser pulses

作　　者：程元丽[1] 赵永蓬[1] 肖亦凡[1] 夏元钦[1] 陈建新[1] 王骐[1] 

机构地区：[1]哈尔滨工业大学可调谐激光技术国家级重点实验室,哈尔滨150001

出　　处：《物理学报》2003年第10期2453-2456,共4页Acta Physica Sinica

基　　金：国家 8 6 3高技术资助的课题~~

摘　　要：用 1 50fs的掺钛蓝宝石激光系统 ,在功率密度约为 5× 1 0 1 5W cm2 时激励氩 (Ar)团簇 ,利用具有空间分辨能力的平场光栅谱仪观察到 1 3— 2 3nm波段Ar的软x射线谱 ,并观察到Ar的 1 1阶离子谱线 .在较宽的激光脉宽和较低的激光功率密度情况下 ,通过激励Ar团簇 ,获得了Ar的高阶电离度的实验结果 ,且谱线的信噪比明显好于光场感应电离的情况 。Soft x-ray emission from Ar clusters irradiated by intense 150 fs laser pulses at an intensity of similar to5 x 10(15) W/cm(2) has been measured with a flat field spectrometer. Strong transitions from ArVIII charge states have been observed, some spectral lines belong to ArXII and ArXIII. Compared with optical field ionization, the interaction of intense laser pulse with clusters enhances drastically the absorption of laser energy and higher charge states are obtained as well. The significant change in the spectrum is attributed to the collisinal heating of small-sized Ar clusters formed at on enough baking pressure of gas.

关 键 词：氩团簇 高信噪比 软X射线辐射谱 掺钛蓝宝石激光系统 Ar团簇 超短强激光 

分 类 号：O434.11[机械工程—光学工程]