A simple magnetic field stabilization technique for atomic Bose-Einstein condensate experiments.

IF 1.7 4区 工程技术 Q3 INSTRUMENTS & INSTRUMENTATION
S Tiengo, R Eid, M Apfel, G Brulin, T Bourdel
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引用次数: 0

Abstract

We demonstrate a simple magnetic field stabilization technique in a Bose-Einstein condensate experiment. Our technique is based on the precise measurement of the current fluctuations in the main magnetic field coils and amounts to their feedforward compensation using an auxiliary coil. It has the advantage of simplicity as the auxiliary coils can be straightforwardly driven at the relevant frequencies (<1 kHz). The performances of the different components (power supply, current transducer, electronics…) are precisely characterized. In addition, for optimal stability, the ambient magnetic field is also measured and compensated. The magnetic field stability around 57 G is measured by Ramsey spectroscopy of a magnetic field sensitive radio frequency transition between two spin states of potassium 39, and the shot-to-shot fluctuations are reduced to 64(7) μG rms, i.e., at the 1 × 10-6 level. In the context of our experiment, this result opens interesting prospects for the study of three-body interactions in Bose-Einstein condensate potassium spin mixtures.

原子玻色-爱因斯坦凝聚实验中一种简单的磁场稳定技术。
我们在玻色-爱因斯坦凝聚实验中演示了一种简单的磁场稳定技术。我们的技术是基于对主磁场线圈中电流波动的精确测量,并使用辅助线圈进行前馈补偿。它具有简单的优点,因为辅助线圈可以直接在相关频率上驱动(
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来源期刊
Review of Scientific Instruments
Review of Scientific Instruments 工程技术-物理:应用
CiteScore
3.00
自引率
12.50%
发文量
758
审稿时长
2.6 months
期刊介绍: Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.
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