Feshbach共振磁场线圈及大电流稳定控制驱动的设计

doi:10.3969/j.issn.0253-2778.2012.01.005

中国科学技术大学学报 ›› 2012, Vol. 42 ›› Issue (1): 31-36.DOI: 10.3969/j.issn.0253-2778.2012.01.005

Feshbach共振磁场线圈及大电流稳定控制驱动的设计

韩鸣飞

中国科学技术大学近代物理系，合肥230026

收稿日期:2011-05-05 修回日期:2011-06-10 出版日期:2012-01-31 发布日期:2012-01-31
通讯作者: 陈帅
作者简介:韩鸣飞，男，1986年生，硕士. 研究方向：冷原子实验. E-mail: atom.hanmf@gmail.com
基金资助:
国家重点基础研究发展（973）计划（2011CD921303）资助.

Design of compact coils and a big stable current driver for Feshbach resonance researches

HAN Mingfei

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

Received:2011-05-05 Revised:2011-06-10 Online:2012-01-31 Published:2012-01-31

摘要/Abstract

摘要： Feshbach共振已成为冷原子研究领域的一种重要实验手段.碱金属原子的Feshbach共振点磁场通常在几百高斯的水平，并且有一定的线宽Δ，这就要求产生的外部调制磁场具有一定的稳定度.设计制作了可以通大电流的亥姆霍兹线圈，用它可以产生需要的强磁场.通过控制线圈电流的稳定度来提高磁场的稳定度.利用一个负积分反馈电路来对电流进行控制，测试得到电流的稳定度达到了1×10-5.

关键词: 玻色-爱因斯坦凝聚, Feshbach共振, 电流源

Abstract: Atomic Feshbach resonance is one of the important tools in quantum gases experiments. The position of a resonance, B0, typically occurs at a few hundred gauss for alkali atoms. The width of a resonance Δ can be relatively smaller, thus requires a stable magnetic field. A set of compact Helmholtz coils were designed, which are capable of carrying a high current for the strong magnetic field while maintaining the required stability. The negative integral feedback loop was used to regulate a current stability up to 10-5.

Key words: Bose-Einstein condensates, Feshbach resonance, current source

韩鸣飞，张进一，颜波，陈帅. Feshbach共振磁场线圈及大电流稳定控制驱动的设计[J]. 中国科学技术大学学报, 2012, 42(1): 31-36.

HAN Mingfei, ZHANG Jinyi, YAN Bo, CHEN Shuai. Design of compact coils and a big stable current driver for Feshbach resonance researches[J]. Journal of University of Science and Technology of China, 2012, 42(1): 31-36.

Feshbach共振磁场线圈及大电流稳定控制驱动的设计

Design of compact coils and a big stable current driver for Feshbach resonance researches

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