In-Situ Measurement of Electrical-Heating-Induced Magnetic Field for an Atomic Magnetometer

Lu, Jixi; Wang, Jing; Yang, Ke; Zhao, Jiheng; Quan, Wei; Han, Bangcheng; Ding, M. D.

doi:10.3390/s20071826

Cited by 24 publications

(14 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The magnetic remanence of the boron nitride oven was very small but the resistance wires in the polyimide film heaters, which are made of non-magnetic constantan, still had a small magnetic field (about 1.1 nT in three directions). In addition, the amplitude of the electric-heating-induced magnetic field for an atomic magnetometer was estimated in our group and described in a previous report [34,35]. The magnetic field, which was produced by electric heating in DC mode at 180 • C, is shown in figure 3.…”

Section: Resultsmentioning

confidence: 89%

Ultra-sensitive all-optical comagnetometer with laser heating

Zhao¹,

Liu²,

Wei³

et al. 2022

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Ultra-sensitive comagnetometers, which are designed to detect nuclear-and electron-spin-dependent interaction, have important applications ranging from basic research to inertial navigation systems (INSs). Unfortunately, electric heating, which is typically used in comagnetometers, introduces systematic errors because of the unavoidable generation of a modulated magnetic field. In this study, we investigate and introduce K-Rb-21Ne comagnetometer that uses laser heating for the first time, when operated in the spin-exchange relaxation free (SERF) regime. The performance of the comagnetometer, which is equipped with both laser heating and electric heating, is investigated, and the two heating modes are compared. The temperature characteristics of the comagnetometer are studied theoretically and experimentally. By optimizing the operating temperature and power density of the pump-light, an equivalent rotation sensitivity of 2.5×10^(-7) rad/s/√Hz@1Hz is achieved in laser heating mode. The improvement of laser-heating technology could prove essential to reduce electron relaxation and increase the low-frequency sensitivity of comagnetometers. Our results indicate that laser heating can make comagnetometers more suitable for applications in basic research (fifth force, dark matter, etc.), INSs, and other accurate measurements of electronic and nuclear precession.

show abstract

Section: Resultsmentioning

confidence: 89%

Ultra-sensitive all-optical comagnetometer with laser heating

Zhao¹,

Liu²,

Wei³

et al. 2022

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…The heating module needs to be installed with the vapor cell for low-power dissipation. [35][36][37] Quspin Inc. utilized resistive heaters generating AC electrical currents to heat the vapor cells without inducing magnetic noise. 38 The feedback…”

Section: Heating Operation Of Alkali Vapor Cellsmentioning

confidence: 99%

“…Coil implements of fiber‐coupled atomic magnetometer of NIST. (A) Photograph of a microfabricated sensor head; (B) photograph of the vacuum package; and (c) a laser for both pump and probe 37 …”

Section: The Current Development Of Fiber‐coupled Ammentioning

confidence: 99%

“…As the magnetometer was sensitive to the field along the direction of the modulation field, F I G U R E 3 Scheme of fiber-coupled magnetometer of NIST 36 F I G U R E 4 Coil implements of fibercoupled atomic magnetometer of NIST. (A) Photograph of a microfabricated sensor head; (B) photograph of the vacuum package; and (c) a laser for both pump and probe 37 simultaneous modulation of two orthogonal axes was considered by degrading the performance by 30%. When magnetometers operated in the multichannel form, the cross-talk could be picked up by adjacent sensors.…”

Section: Magnetic Shielding Systemmentioning

confidence: 99%

See 1 more Smart Citation

A review of fiber‐coupled atomic magnetometer

Liu

Yang

et al. 2022

Micro & Optical Tech Letters

View full text Add to dashboard Cite

Fiber-coupled atomic magnetometer (AM) based on a spin-exchange relaxation-free (SERF) regime has been a promising candidate for cryogenic devices for traditional magnetoencephalography (MEG) systems, as it has a flexible structure and a small lateral section for biomedical applications. The principles, key technologies, and applications of fiber-coupled AM based on the atomic spin effect are reviewed in this paper. The principle of fibercoupled AM is introduced, the characteristics of conventional and fibercoupled AMs are compared, and the development history and current situation are reviewed. In addition, according to the demands for MEG applications, the key technologies of fiber-coupled AM are summarized, and the bottleneck problems and future development directions for weak magnetic measurement are analyzed.

show abstract

“…The vector OPM, diagrammed in figure 1(b), is built around a cubic glass cell containing rubidium, 1 atm of N 2 to slow atomic diffusion and quenching [29]. The cell is electrically heated by an electronic heater using AC currents at 300 kHz to achieve optimum alkali vapour density [30]. The sensor includes three electromagnetic coils which can be used to null any static field around the cell.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

The influence of temperature and modulated magnetic field on the transmission intensity of atomic magnetometer

Yin¹,

Zhou²,

Yin³

et al. 2021

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

The single-beam miniaturized atomic magnetometer with modulated magnetic field is one of the most capable approaches to biomagnetic measurements. The transmission intensity of the pumping beam is critical to the sensitivity of the magnetometer, which is affected by the density of alkali metal and the polarization of atomic spin. In this study, we investigated into the influence of three variables: the temperature of atomic vapour; the amplitude of the modulated magnetic field; the frequency of modulated magnetic field on the transmission intensity of pumping beam. We have defined their relationship into a function, and the calculated values through theoretical analysis have a high degree of fit with the measured values of numerous experiments. It is discovered that the transmission intensity decreases with the increase in temperature, and this effect is modified by the modulation index. A compact magnetometer is developed as a proof of concept based on single-beam scheme. The volume of this magnetometer is 10 cm 3 , and its dual axis sensitivity are both 30 fT/Hz 1/2 . Based on this relationship we find that two major improvements are achieved by separating the DC and AC components of transmission intensity: 1. Realizing closed-loop temperature control for atomic vapour which improved the stability of the magnetometer. 2. Achieving closed-loop dual axis magnetic measurements under a single-beam scheme, which extends the magnetometer's scope of application.

show abstract

In-Situ Measurement of Electrical-Heating-Induced Magnetic Field for an Atomic Magnetometer

Cited by 24 publications

References 35 publications

Ultra-sensitive all-optical comagnetometer with laser heating

Ultra-sensitive all-optical comagnetometer with laser heating

A review of fiber‐coupled atomic magnetometer

The influence of temperature and modulated magnetic field on the transmission intensity of atomic magnetometer

Contact Info

Product

Resources

About