3D magnetometer for a dilution refrigerator

Uchaikin, S.; Likhachev, A.G.; Cioata, Florentin; Perminov, I.; Sanghera, Hardeep; Singh, I.V.; Spear, Peter D.; Chavez, P.P.; Han, Xiaotao; Petroff, C; Rich, Chris

doi:10.1088/1742-6596/400/5/052037

Cited by 6 publications

(3 citation statements)

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“…For example, by creating appropriate sensors. Printed-circuit technique could be sufficient to create appropriate sensors for such tasks [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

An Approach to Monitoring of Magnetic Parameters of Cores of a Chain of Spheres. Diagnostics of Different Chain’s Length and Core’s Radius

Sandulyak

Gorpinenko

et al. 2022

Prib. metody izmer.

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The basic structural elements of the magnetized granular medium (effectively used, in particular, in apparatus of thin magnetic separation) are granule chains (according to channel-by-channel model), in connection with which there is a need to detail the features of their magnetization. The purpose of the work is to develop and implement an approach to measuring magnetic (micro)flows along the cores of different radius r in the chain of granules using a specially developed (by printed circuit board technology) sensor, with high radius R (15 and 20 mm) spheres available for such measurements.From the data of measuring magnetic (micro)flows data of average induction in each of the quasi-continuous cores of the spheres chain are obtained, as well as data of magnetic permeability and susceptibility of these cores, their magnetization for different values of the intensity of the magnetizing field. It is shown that dependences of mentioned magnetic parameters from number n spheres in a chain are generalized on r /R for different R.These relationships, increasing as n increases due to a decrease in the demagnetizing factor N of any of the cores and the chain as a whole, demonstrate the achievement of individually limiting values of magnetic parameters and corresponding auto-model regions where N→0. At the same time, the transition to each of these regions, manifesting almost independently of r /R and intensity, falls on the value of n = 10–12 = [n]. Thus, in fact, such a criterion value [n] distinguishes chains by sufficiently “long” – when n ≥ [n] and “short” – when 2 ≤ n ˂ [n]. Data of demagnetizing factor for different cores of “short” chains of spheres are obtained and phenomenologically described.

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“…For example, by creating appropriate sensors. Printed-circuit technique could be sufficient to create appropriate sensors for such tasks [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

An Approach to Monitoring of Magnetic Parameters of Cores of a Chain of Spheres. Diagnostics of Different Chain’s Length and Core’s Radius

Sandulyak

Gorpinenko

et al. 2022

Prib. metody izmer.

View full text Add to dashboard Cite

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“…The measurement of magnetic fields is among crucial problems in the fields of space and geophysical studies [1][2], systems for navigation, orientation and stabilization [3], in quantum computer shields [4][5][6], magnetic resonance imaging, visualization of brain functions, fault detection and non-destructive testing [7] and many other areas. One more example of magnetometer implementation is a magnetic vacuum system that allows minimizing the influence of external magnetic fields on electronics.…”

Section: Introductionmentioning

confidence: 99%

Designing a Planar Fluxgate Using the PCB Technology

Коломейцев

Zatonov

Пищанская

et al. 2021

Prib. metody izmer.

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The development of novel methods, scientific devices and means for measuring magnetic fields generated by ultra-low current is among promising directions in the development of medical equipment and instruments for geodetic surveys and space exploration. The present work is to develop a small sensor capable of detecting weak magnetic fields, which sources are biocurrents, radiation of far space objects and slight fluctuations of the geomagnetic field. Scientists estimate the strength of such magnetic fields as deciles of nanotesla. The key requirements for the sensors of ultra-low magnetic field are: resolution, noise level in the measurement channel, temperature stability, linearity and repeatability of the characteristics from one produced item to another. The aforementioned characteristics can be achieved by using planar technologies and microelectromechanical systems (MEMS) in such advanced sensors.The work describes a complete R&D cycle, from creating the computer model of the sensor under study to manufacturing of a working prototype. To assess the effect of the geometry and material properties, the Jiles–Atherton model is implemented which, unlike the majority of the models used, allows considering the non-linearity of the core, its hysteresis properties and influence of residual magnetization.The dimensions of the developed sensor are 40×20×5 mm, while the technology allows its further diminishment. The sensor has demonstrated the linearity of its properties in the range of magnetic field strength from 0.1 nT to 50 µT for a rms current of excitation of 1.25 mA at a frequency of 30 kHz. The average sensitivity for the second harmonic is 54 µV/nT.

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“…Weak magnetic field measurement (from 10 -11 to 10 -4 T) is a crucial objective in terms of space and geophysical research, attitude control [1][2][3][4][5][6], magnetic tomography, defectoscopy, non-destructive testing [7][8][9][10] …”

Section: Introductionmentioning

confidence: 99%