线形离子阱囚禁199Hg+实验的光学系统设计

何跃宏; 佘磊; 陈义和; 李交美

线形离子阱囚禁199Hg+实验的光学系统设计

何跃宏^1,2, ,,
佘磊¹,
陈义和¹,
李交美¹

1.
中国科学院武汉物理与数学研究所,湖北武汉 430071;
2.
中国科学院研究生院,北京 100049

基金项目:

国家自然科学基金 (11074282)

详细信息

通讯作者:
何跃宏（1987-），男，浙江淳安人，博士研究生，主要从事线形阱汞离子微波频标方面的研究。 Email：hyh19871201@126.com

中图分类号: TN202；TH703
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出版历程
- 刊出日期: 2014-11-15

Design of optical system for trapped 199Hg+ in linear ion trap

1.
Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences,Wuhan 430071,China;
2.
Graduate School,Chinese Academy of Sciences,Beijing 100049,China

摘要

摘要: 利用Zemax软件为线形离子阱囚禁199Hg+实验设计了一套光学系统，该系统包括两部分，即光学激发系统和荧光收集系统。光学激发系统由202Hg无极谱灯和激发透镜组组成。激发透镜组将202Hg无极谱灯的直径为15 mm的圆形面光源整形成23 mm4 mm的矩形光去激发199Hg+能级跃迁，从而使其辐射出荧光，再利用荧光收集系统去收集该荧光。荧光收集系统由收集透镜组、滤波片和光电倍增管组成。设计结果表明：该收集透镜组可以很好地将荧光发光面成像在直径为23 mm的光电倍增管上，具有较高的荧光收集效率,约3%。经物理系统实验，结果表明，该光学系统满足实验要求且具有较高的信噪比，其值约为20。这为高性能线形199Hg+微波频标的工程应用提供了基础。
- 原子与分子物理学 /
- 光学设计 /
- 光学激发系统 /
- 荧光收集系统
Abstract: An optical system for trapped 199Hg+ in linear ion trap was designed by the Zemax software. The optical system consists of two parts which are optical excitation system and fluorescence collection system. The optical excitation system is composed of 202Hg electrodeless lamp and excitation lens system. The diameter of 15 mm surface light which is produced by 202Hg electrodeless lamp is transformed into rectangular light of 23 mm4 mm by the excitation lens system. The rectangular light excites 199Hg+ atomic transition and then the 199Hg+ radiates fluorescence. The fluorescence is collected by the fluorescence collection system which is composed of collection lens system, filter and photomultiplier tube (PMT). The design results show that the fluorescence emitting surface is imaged well in the PMT whose diameter is 23 mm by the collection lens system. So the fluorescence collection is quite efficient and the collection efficiency is about 3%. Experimental results show that the optical system is completely satisfied for present experiment and it has a high signal to noise ratio (SNR) which is about 20. It makes necessary preparation for application of highperformance 199Hg+ microwave frequency standard.
- atomic and molecular physics /
- optical design /
- optical excitation system /
- fluorescence collection system

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参考文献(1)

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