Measurement of the Ratio between <i>g</i>‐Factors of the Ground States of 87Rb and 85Rb

Mora, J. Castroviejo; Cobos, Aracely; Fuentes, Dominic; Kimball, Derek F. Jackson

doi:10.1002/andp.201800281

Cited by 12 publications

(7 citation statements)

References 50 publications

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“…In essence, magnetometers measure frequencies which must be converted to corresponding magnetic-field values. For some applications, such as precise mapping of the geomagnetic field and other coarse magnetic structures, or precise measurement of physical constants, accuracy is paramount and may outrank sensitivity as the dominant figure of merit [29,66]. Since atoms form the heart of the magnetometers under consideration here, these can be used as an absolute reference during magnetometer calibration, in order to improve accuracy.…”

Section: Stability and Accuracymentioning

confidence: 99%

How to build a magnetometer with thermal atomic vapors: A tutorial

Fabricant¹,

Novikova²,

Bison³

2022

Preprint

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This manuscript is designed as a step-by-step guide to optically pumped magnetometers based on alkali atomic vapor cells. We begin with a general introduction to atomic magneto-optical response, as well as expected magnetometer performance merits and how they are affected by main sources of noise. This is followed by a brief comparison of different magnetometer realizations and an overview of current research, with the aim of helping readers to identify the most suitable magnetometer type for specific applications. Next, we discuss some practical considerations for experimental implementations, using the case of an M z magnetometer as an example of the design process. Finally, an interactive workbook with real magnetometer data is provided to illustrate magnetometer-performance analysis.

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Section: Stability and Accuracymentioning

confidence: 99%

How to build a magnetometer with thermal atomic vapors: A tutorial

Fabricant¹,

Novikova²,

Bison³

2022

Preprint

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“…Other transit time limited experiments involving the configuration in Fig. 1 have been utilized for precise measurements of atomic g-factor ratios [28,29]. However, this type of magnetometer is not ideally suited for diffusion measurements since the signal decay must be mod-elled by a complex function which is sensitive to various mechanisms of spin-depolarization in addition to diffusion.…”

Section: Population and Coherence Magnetometrymentioning

confidence: 99%

Accurate Determination of an alkali-inert gas diffusion coefficient using coherent transient emission from a density grating

Pouliot,

Carlse,

Vacheresse

et al. 2021

Preprint

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We demonstrate a new technique for the accurate measurement of diffusion coefficients for alkali vapor in an inert buffer gas. The measurement was performed by establishing a spatially periodic density grating in isotopically pure 87 Rb vapor and observing the decaying coherent emission from the grating due to the diffusive motion of the vapor through N2 buffer gas. We obtain a diffusion coefficient of 0.245 ± 0.002 cm 2 /s at 50 • C and 564 Torr. Scaling to atmospheric pressure, we obtain D0 = 0.1819 ± 0.0024 cm 2 /s. To the best of our knowledge, this represents the most accurate determination of the Rb-N2 diffusion coefficient to date. Our measurements can be extended to different buffer gases and alkali vapors used for magnetometry and can be used to constrain theoretical diffusion models for these systems.

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“…Implementation of the spin maser concept helps to overcome some of the important technological challenges in NDT with rf atomic magnetometers, in particular the stability of the bias field in the presence of a ferromagnetic object and the image acquisition time [17][18][19][20]. The latter is demonstrated through the Larmor frequency ratio measurement between the two hyperfine ground-state levels, which has applications in the measurement of the g i /g j ratio [21] or for the possible detection of dark-matter candidates, i.e., axion wind, through interaction with the atomic spins [15,16,22]. The dark-matter searches are the focus of many theoretical and experimental efforts, and ultrasensitive atomic magnetometers are one of the systems being used in this pursuit [23,24].…”

Section: Introductionmentioning

confidence: 99%

Dual-frequency cesium spin maser

et al. 2020

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Comagnetometers have been validated as valuable components of the atomic physics toolbox in fundamental and applied physics. So far, the explorations have been focused on systems involving nuclear spins. Presented here is a demonstration of an active alkali-metal (electronic) system, i.e., a dual-frequency spin maser operating with the collective cesium F = 3 and F = 4 spins. The experiments have been conducted in both magnetically shielded and unshielded environments. In addition to the discussion of the system's positive-feedback mechanism, the implementation of the dual-frequency spin maser for industrial nondestructive testing is shown. The stability of the F = 3 and F = 4 spin precession frequency ratio measurement is limited at the 3 × 10 −8 level by the laser frequency drift, corresponding to a frequency stability of 1.2 mHz for 10 4 s integration time. We discuss measurement strategies that could improve this stability to nHz, enabling measurements with sensitivities to the axion-nucleon and axion-electron interactions at the levels of f a /C N ∼ 10 9 and f a /C e ∼ 10 8 GeV, respectively.

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Measurement of the Ratio between g‐Factors of the Ground States of 87Rb and 85Rb

Cited by 12 publications

References 50 publications

How to build a magnetometer with thermal atomic vapors: A tutorial

How to build a magnetometer with thermal atomic vapors: A tutorial

Accurate Determination of an alkali-inert gas diffusion coefficient using coherent transient emission from a density grating

Dual-frequency cesium spin maser

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