TEST OF LORENTZ INVARIANCE WITH A RB-<sup>21</sup>NE COMAGNETOMETER AT THE SOUTH POLE

Smiciklas, Marc; Romalis, M. V.

doi:10.1142/9789814566438_0024

Cited by 13 publications

(16 citation statements)

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“…Finally, this review would be incomplete without mentioning the high-precision Lorentz-invariance tests carried out with atomic sensors at the South Pole [281], as an example of a challenging measurement in more than one sense.…”

Section: Discussionmentioning

confidence: 99%

Sensitive magnetometry in challenging environments

Fu¹,

Iwata²,

Wickenbrock³

et al. 2020

Preprint

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State-of-the-art magnetic field measurements performed in shielded environments with carefully controlled conditions rarely reflect the realities of those applications envisioned in the introductions of peer-reviewed publications. Nevertheless, significant advances in magnetometer sensitivity have been accompanied by serious attempts to bring these magnetometers into the challenging working environments in which they are often required. In this review, we cover the ways in which various magnetometer technologies have been adapted for use in challenging environments.

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Section: Discussionmentioning

confidence: 99%

Sensitive magnetometry in challenging environments

Fu¹,

Iwata²,

Wickenbrock³

et al. 2020

Preprint

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“…The alkali-metal-noble-gas comagnetometer based on SERF magnetometer is used in the research regarding fundamental physics and inertial navigations. Due to the suppression of spin exchange relaxation, the SERF comagnetometers have the potential to realize ultra-sensitive measurements and are widely used in charge-parity-time (CPT) violation, Lorenz symmetry experiments [8][9][10], and spin interaction force [11][12][13]. Furthermore, the SERF comagnetometers are also deemed as promising high-precision rotation sensors in long endurance and high precision inertial navigation [14,15].…”

Section: Introductionmentioning

confidence: 99%

Design of real time magnetic field compensation system based on fuzzy PI control algorithm for comagnetometer

Tang¹,

Liu²,

Prado³

et al. 2022

J. Phys. D: Appl. Phys.

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Alkali-metal-noble-gas comagnetometers operating in the spin exchange relaxation free (SERF) regime have been widely used in frontier science research and navigation technology. Under normal circumstances, the comagnetometer operates at the compensation point so that any interfering external magnetic field is tracked and suppressed by the nuclear spin. This in turn can greatly diminish the comagnetometer's sensitivity to the magnetic field; however, its sensitivity to rotations and to anomalous fields is still maintained. The compensation point is typically adjusted manually, which leads to low accuracy and compensation speed, in addition to only allowing short-term magnetic field stability. In order to account for these problems, we designed a three-axis magnetic field compensation system in real time based on LabVIEW, and employed it to a K-Rb-21Ne comagnetometer. Our study shows that by using a fuzzy-proportional-integral (Fuzzy-PI) controller, the compensation point can be tracked in real time and with higher precision when compared with manually adjusted methods, therefore improving the magnetic field stability and sensitivity of the comagnetometer. In addition, the real-time magnetic compensation system can also be widely used in magnetometers.

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“…With the rapid development of quantum manipulation techniques, an alkali metal-noble gas co-magnetometer operating in the spin-exchange-relaxation-free (SERF) regime has been widely used in navigation field [1][2][3][4], general relativity research [5] and CPT violation measurement [6,7]. When the valence electron of alkali metals works in the SERF regime, the spin-exchange relaxation rate is much faster than the Larmor precession frequency of atomic spins.…”

Section: Introductionmentioning

confidence: 99%

Optical rotation detection method based on acousto-optic modulation in an atomic spin co-magnetometer

Xing¹,

Zhai²,

Fu³

et al. 2020

Meas. Sci. Technol.

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A new concept for probe light intensity stability control and high-frequency modulation based on an acousto-optic modulation in a K-Rb-21Ne co-magnetometer is reported. The structure and optical path are ingeniously designed to avoid the interference of zero-order diffraction light. The average rotation rate sensitivity of 7 .9 × 1 0 - 7 rad s − 1 Hz − 1 / 2 is achieved under the light intensity closed-loop control condition and the bias instability calculated by the Allan deviation is improved from 0.13 deg h−1 to 0.06 deg h−1 comparing with open-loop scheme. A square wave modulation with a wide range of frequencies is applied to the probe light intensity and the appropriate modulation frequency for the co-magnetometer is tested to be 10 kHz to 300 kHz and megahertz scale. Finally, the closed-loop control of light intensity has been combined with the high-frequency modulation, which could suppress the low-frequency noise contained in the probe system and improve the long-term stability of the angular velocity measurement.

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TEST OF LORENTZ INVARIANCE WITH A RB-²¹NE COMAGNETOMETER AT THE SOUTH POLE

Cited by 13 publications

References 0 publications

Sensitive magnetometry in challenging environments

Sensitive magnetometry in challenging environments

Design of real time magnetic field compensation system based on fuzzy PI control algorithm for comagnetometer

Optical rotation detection method based on acousto-optic modulation in an atomic spin co-magnetometer

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TEST OF LORENTZ INVARIANCE WITH A RB-21NE COMAGNETOMETER AT THE SOUTH POLE

Cited by 13 publications

References 0 publications

Sensitive magnetometry in challenging environments

Sensitive magnetometry in challenging environments

Design of real time magnetic field compensation system based on fuzzy PI control algorithm for comagnetometer

Optical rotation detection method based on acousto-optic modulation in an atomic spin co-magnetometer

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TEST OF LORENTZ INVARIANCE WITH A RB-²¹NE COMAGNETOMETER AT THE SOUTH POLE