{"title":"A simple magnetic field stabilization technique for atomic Bose-Einstein condensate experiments.","authors":"S Tiengo, R Eid, M Apfel, G Brulin, T Bourdel","doi":"10.1063/5.0258855","DOIUrl":null,"url":null,"abstract":"<p><p>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.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 6","pages":""},"PeriodicalIF":1.7000,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Review of Scientific Instruments","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1063/5.0258855","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"INSTRUMENTS & INSTRUMENTATION","Score":null,"Total":0}
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.
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.