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| 冷原子束在线检测系统 | |
| 引用本文： | 王晓佳,焱颖,薛洪波.冷原子束在线检测系统[J].中国激光,2012,39(5):508004-211. |
| 作者姓名： | 王晓佳 焱颖 薛洪波 |
| 作者单位： | 王晓佳:中北大学， 仪器科学与动态测试教育部重点实验室， 山西 太原 030051清华大学精密仪器与机械学系， 精密测试技术及仪器国家重点实验室， 北京 100084 焱颖:清华大学精密仪器与机械学系， 精密测试技术及仪器国家重点实验室， 北京 100084中国计量科学研究院清华大学精密测量联合实验室， 北京 100084 薛洪波:清华大学精密仪器与机械学系， 精密测试技术及仪器国家重点实验室， 北京 100084 |
| 基金项目： | 国家973计划(2010CB922901)、国家自然科学基金(50775127)和清华大学校内自主科研计划(2009THZ06)资助课题。 |
| 摘 要： | 应用荧光法和飞行时间(TOF)法实现了冷原子束纵向速度谱、通量及原子能态分布的在线检测。设计用于荧光收集的光学系统和机械结构,实现了焦距可微调的即插即用式荧光检测装置,实现了冷原子束检测系统的集成性和检测结果的高信噪比(SNR)。利用LabView软件实现对光电倍增管(PMT)、飞行时间法检测时序及检测激光的扫频范围等的控制,可在线得到原子束性能参数,并对数据进行平滑处理。检测结果表明,检测系统检测信号的信噪比为57:1(在20ms内)。 |
| 关 键 词： | 原子与分子物理学 冷原子束 飞行时间法 荧光法 能态检测 |
| 收稿时间： | 2012/1/9 |
An Online Detection System for Atomic Beam |
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| Wang Xiaojia,Feng Yanying,Xue Hongbo.An Online Detection System for Atomic Beam[J].Chinese Journal of Lasers,2012,39(5):508004-211. | |
| Authors: | Wang Xiaojia Feng Yanying Xue Hongbo |
| Affiliation: | 1Key Laboratory of Instrumentation Science and Dynamic Measurement,Ministry of Education,North University of China,Taiyuan,Shanxi 030051,China2State Key Laboratory of Precision Measurement Technology and Instruments,Department of PrecisionInstruments and Mechanology,Tsinghua University,Beijing 100084,China3Joint Institute of Measurement Science,National Institute of Metrology-Tsinghua University,Beijing 100084,China) |
| Abstract: | An online detection system is developed for measuring the longitudinal velocity spectrum, flux and populations in specific states of an atomic beam, through the fluorescence and the time of flight (TOF) method. A fluorescence collection optical system with a plug and play and focal length adjustable mechanical structure is designed to improve the system integration and the signal to noise ratio (SNR). The system is used to measure and analyze on-line performance of an atomic beam, with a program based on LabView for the control of the photomultiplier tubes (PMT), the timing of TOF, the sweep range of the probe laser, and smoothing the results. The experimental results show that the SNR up to 571 (in 20 ms) can be obtained in this system. |
| Keywords: | atomic and molecular physics cold atomic beam time of flight fluorescence state detection |
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