Bidirectional, Analog Current Source Benchmarked with Gray Molasses-Assisted Stray Magnetic Field Compensation

In ultracold-atom and ion experiments, flexible control of the direction and amplitude of a uniform magnetic field is necessary. It is achieved almost exclusively by controlling the current flowing through coils surrounding the experimental chamber. Here, we present the design and characterization o...

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Autores principales:	Jakub Dobosz, Mateusz Bocheński, Mariusz Semczuk
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	stray magnetic fields compensation coils sub-Doppler cooling bipolar current source bidirectional current source Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/c5c0a0ae66984bf2bcbfaa82c6692e16
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spelling	oai:doaj.org-article:c5c0a0ae66984bf2bcbfaa82c6692e162021-11-11T15:24:59ZBidirectional, Analog Current Source Benchmarked with Gray Molasses-Assisted Stray Magnetic Field Compensation10.3390/app1121104742076-3417https://doaj.org/article/c5c0a0ae66984bf2bcbfaa82c6692e162021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10474https://doaj.org/toc/2076-3417In ultracold-atom and ion experiments, flexible control of the direction and amplitude of a uniform magnetic field is necessary. It is achieved almost exclusively by controlling the current flowing through coils surrounding the experimental chamber. Here, we present the design and characterization of a modular, analog electronic circuit that enables three-dimensional control of a magnetic field via the amplitude and direction of a current flowing through three perpendicular pairs of coils. Each pair is controlled by one module, and we are able to continuously change the current flowing thorough the coils in the ±4 A range using analog waveforms such that smooth crossing through zero as the current’s direction changes is possible. With the electrical current stability at the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mrow><mo>−</mo><mn>5</mn></mrow></msup></semantics></math></inline-formula> level, the designed circuit enables state-of-the-art ultracold experiments. As a benchmark, we use the circuit to compensate stray magnetic fields that hinder efficient sub-Doppler cooling of alkali atoms in gray molasses. We demonstrate how such compensation can be achieved without actually measuring the stray fields present, thus speeding up the process of optimization of various laser cooling stages.Jakub DoboszMateusz BocheńskiMariusz SemczukMDPI AGarticlestray magnetic fieldscompensation coilssub-Doppler coolingbipolar current sourcebidirectional current sourceTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10474, p 10474 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	stray magnetic fields compensation coils sub-Doppler cooling bipolar current source bidirectional current source Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	stray magnetic fields compensation coils sub-Doppler cooling bipolar current source bidirectional current source Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Jakub Dobosz Mateusz Bocheński Mariusz Semczuk Bidirectional, Analog Current Source Benchmarked with Gray Molasses-Assisted Stray Magnetic Field Compensation
description	In ultracold-atom and ion experiments, flexible control of the direction and amplitude of a uniform magnetic field is necessary. It is achieved almost exclusively by controlling the current flowing through coils surrounding the experimental chamber. Here, we present the design and characterization of a modular, analog electronic circuit that enables three-dimensional control of a magnetic field via the amplitude and direction of a current flowing through three perpendicular pairs of coils. Each pair is controlled by one module, and we are able to continuously change the current flowing thorough the coils in the ±4 A range using analog waveforms such that smooth crossing through zero as the current’s direction changes is possible. With the electrical current stability at the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mrow><mo>−</mo><mn>5</mn></mrow></msup></semantics></math></inline-formula> level, the designed circuit enables state-of-the-art ultracold experiments. As a benchmark, we use the circuit to compensate stray magnetic fields that hinder efficient sub-Doppler cooling of alkali atoms in gray molasses. We demonstrate how such compensation can be achieved without actually measuring the stray fields present, thus speeding up the process of optimization of various laser cooling stages.
format	article
author	Jakub Dobosz Mateusz Bocheński Mariusz Semczuk
author_facet	Jakub Dobosz Mateusz Bocheński Mariusz Semczuk
author_sort	Jakub Dobosz
title	Bidirectional, Analog Current Source Benchmarked with Gray Molasses-Assisted Stray Magnetic Field Compensation
title_short	Bidirectional, Analog Current Source Benchmarked with Gray Molasses-Assisted Stray Magnetic Field Compensation
title_full	Bidirectional, Analog Current Source Benchmarked with Gray Molasses-Assisted Stray Magnetic Field Compensation
title_fullStr	Bidirectional, Analog Current Source Benchmarked with Gray Molasses-Assisted Stray Magnetic Field Compensation
title_full_unstemmed	Bidirectional, Analog Current Source Benchmarked with Gray Molasses-Assisted Stray Magnetic Field Compensation
title_sort	bidirectional, analog current source benchmarked with gray molasses-assisted stray magnetic field compensation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c5c0a0ae66984bf2bcbfaa82c6692e16
work_keys_str_mv	AT jakubdobosz bidirectionalanalogcurrentsourcebenchmarkedwithgraymolassesassistedstraymagneticfieldcompensation AT mateuszbochenski bidirectionalanalogcurrentsourcebenchmarkedwithgraymolassesassistedstraymagneticfieldcompensation AT mariuszsemczuk bidirectionalanalogcurrentsourcebenchmarkedwithgraymolassesassistedstraymagneticfieldcompensation
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Bidirectional, Analog Current Source Benchmarked with Gray Molasses-Assisted Stray Magnetic Field Compensation

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