| 合肥光源单束团下束团长度和能散的测量 |
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| 引用本文： | 陈洪耀,张黎明,杨本永,徐伟伟. 合肥光源单束团下束团长度和能散的测量[J]. 强激光与粒子束, 2009, 21(10): 0 |
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| 作者姓名： | 陈洪耀 张黎明 杨本永 徐伟伟 |
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| 作者单位： | 1.中国科学技术大学 核科学技术学院 国家同步辐射实验室, 合肥 230029 |
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| 摘 要： | 根据同步光与储存环中的束流信号具有相同的时间结构的原理，测量同步光脉冲的半高全宽值可以计算出束团的长度。根据合肥光源的特点和实际需要，选择快速光电接收器搭配高速高带宽示波器作为在线测量束团长度和纵向分布等的主要手段。对单束团模式下束团长度随流强和高频腔腔压的变化趋势进行了测量。测量结果表明:束团长度与腔压的0.3次方成反比，比理论值0.5小；而束团长度随流强的增长率为2.0 ps/mA。通过测量纵向量子寿命进行了能散随流强变化的间接测量，结果表明，束团的拉伸是能散变化和势阱效应共同作用的结果。
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| 关 键 词： | 单束团 光电法 束团长度 束团纵向分布 能散 |
| 收稿时间： | 1900-01-01; |
Diffuser reflection method for measuring power/energy of far-field laser spot |
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| Chen Hongyao,Zhang Liming,Yang Benyong,Xu Weiwei. Diffuser reflection method for measuring power/energy of far-field laser spot[J]. High Power Laser and Particle Beams, 2009, 21(10): 0 |
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| Authors: | Chen Hongyao Zhang Liming Yang Benyong Xu Weiwei |
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| Affiliation: | 1.National Synchrotron Radiation Laboratory,School of Nuclear Science and Technology,University of Science and Technology of China,P.O.Box 6022,Hefei 230029,China |
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| Abstract: | A diffuser reflection method for laser beam power/energy measurement is proposed. Using the Lambert character of the diffuser, according to the definition of BRDF, through the reflect signal measurement, the power/energy of the laser incident on the diffuser can be achieved. In practice, on the basis of laboratory calibration, the power/energy standard is transferred into the diffuser-detector system, then the calibrated system is utilized to realized laser power/energy measurement in the field. The uncertainty analysis shows that uncertainty of the measurement is less than 10%, the method can greatly improve the accuracy of far-field spot power/energy measurement. |
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| Keywords: | infrared diffuser bidrectional reflectance distribution function calibration far-field laser spot |
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