A stable ac current source for magnetic traps

A stable ac current source for magnetic traps
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用于磁阱的稳定交流电流源

DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
C. Sackett
C. Sackett
中科院分区：
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文献类型：
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作者：
K. Baranowski;C. Sackett

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提出了一种能够提供幅度高达50 A和频率接近10 kHz的交流电流的电源。电流放大是主动稳定的，并表现出优于105分之一的分数电流噪声。该源是为与基于磁捕获凝聚原子的原子干涉仪一起使用而开发的。电流噪声和干涉仪噪声之间的关系的开发，它示出的演示精度应允许干涉与相干时间为1秒或更长。
A power source is presented capable of providing ac currents with amplitudes of up to 50 A and frequencies near 10 kHz. The current amplification is actively stabilized and exhibits fractional current noise better than one part in 105. The source was developed for use with an atom interferometer based on magnetically trapped condensate atoms. The relationship between current noise and interferometer noise is developed, and it is shown that the demonstrated precision should permit interferometry with coherence times of 1 s or more.