Deceleration and trapping of heavy diatomic molecules using a ring-decelerator
Deceleration and trapping of heavy diatomic molecules using a ring-decelerator
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DOI：
10.1140/epjd/e2012-30017-5
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发表时间：
2011-04
期刊：
影响因子：
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通讯作者：
J. V. D. Berg;S. H. Turkesteen;E. Prinsen;S. Hoekstra
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文献类型：
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作者：
J. V. D. Berg;S. H. Turkesteen;E. Prinsen;S. Hoekstra
本文分析了运动电势对处于低场寻道态的重双原子分子的减速和囚禁。这种移动的电势是由一个“环形减速器”产生的，该环形减速器由一系列环形电极组成，向这些电极施加振荡的高电压。粒子轨迹模拟已被用来分析一组分子的减速和捕获效率，这是特别感兴趣的基本离散对称性的精确测量。对于SrF分子在（N，M）=（2，0）状态的典型情况，环减速器被示出为优于传统和交替梯度斯塔克减速器至少一个数量级。如果通过激光冷却的阶段进一步冷却，则减速的分子允许与低温分子束实验相比，在宇称违反测量中的灵敏度增益几乎为两个数量级。
We present an analysis of the deceleration and trapping of heavy diatomic molecules in low-field seeking states by a moving electric potential. This moving potential is created by a “ring-decelerator”, which consists of a series of ring-shaped electrodes to which oscillating high voltages are applied. Particle trajectory simulations have been used to analyze the deceleration and trapping efficiency for a group of molecules that is of special interest for precision measurements of fundamental discrete symmetries. For the typical case of the SrF molecule in the (N, M) = (2, 0) state, the ring-decelerator is shown to outperform traditional and alternate-gradient Stark decelerators by at least an order of magnitude. If further cooled by a stage of laser cooling, the decelerated molecules allow for a sensitivity gain in a parity violation measurement, compared to a cryogenic molecular beam experiment, of almost two orders of magnitude.