A Smoothly-Connected Crescent Transverse Gradient Coil Design for 50mT MRI System

Xuan, Liang; Kong, Xiaohan; Wu, Jiamin; He, Yucheng; Xu, Zheng

doi:10.1007/s00723-021-01330-5

Cited by 15 publications

(5 citation statements)

References 22 publications

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“…By applying current to it, a spatial linear magnetic field can be generated, which meets the requirements that the MFS on different plasma layers are precise and different. [ 44 ] When EWs propagate in the 1D JMS, the EWs under TM polarization are affected by Lorentz's force. Nevertheless, under TE polarization, the propagating EWs in the structure are unacted on the magnetic fields B 1 and B 2 .…”

Section: Design and Discussionmentioning

confidence: 99%

Janus Metastructure Based on Magnetized Plasma Material with and Logic Gate and Multiple Physical Quantity Detection

et al. 2023

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In this paper, a Janus metastructure (JMS) is proposed that can act both as a logic gate and detect multiple physical quantities. By adjusting the incident angle of electromagnetic waves, arranging the dielectrics asymmetrically, and using the anisotropy of the plasma, the Janus function can be obtained, which gives the metastructure a multiscale property. Sharp transmission peak (TP) is generated by located defect mode resonance. The AND logic gate on the positive and negative scales can be realized by judging the TP value. By locking the point frequency of the TP, the refractive index, magnetic field strength, incident angle, and plasma density can be detected simultaneously on the two scales in the GHz range, which is rarely studied. Good sensing performances are also owned, and the corresponding optimal sensitivities are 0.095 (2πc/d)/RIU, 9.42 × 10−3 (2πc/d)/T, 1.48 × 10−3 (2πc/d)/°, and 0.035 (2πc/d) m3/1019, respectively. Compared with the traditional sensors, the proposed JMS equipped with two scales not only can realize the logic gate but also measure multiple physical quantities, which has a certain application potential.

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Section: Design and Discussionmentioning

confidence: 99%

Janus Metastructure Based on Magnetized Plasma Material with and Logic Gate and Multiple Physical Quantity Detection

et al. 2023

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“…It means that, without changing the structure or materials, the function can be switched by optical phase modulation, and then the single function that is operating can perform better via magnetic field modulation, a non-contact mean. If considering the actual operation, the magnetic field can be generated by an energized gradient coil [36], which is a spatial linear magnetic field suitable for use in this proposed structure. A spatial linear magnetic field can be generated with gradient magnetic field coils.…”

Section: The Sensing Performancementioning

confidence: 99%

A functionality-switchable device based on coherent perfect absorption with narrowband absorbing performance and sensing function

Zhang¹,

Zhang²,

Zhang³

2023

Phys. Scr.

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An optical structure containing the ferrite defects and Fabry-Pérot cavity with a narrowband absorption feature and a sensing performance is proposed and modeled in theoretical scope. These two features appear alternately on adjacent frequency ranges with modulation of the coherent perfect absorption by altering the phase difference between the two coherent incident lights. For the absorption band, the relative bandwidth reaches 9.7%. Benefiting from the modulation of the magnetic field applied in the ferrite layers, the quality value of the absorption peak is 494.85, which indicates the potential for use as a sensor. There are highly linear relationships between the refractive index values of dielectric layers and the spike absorption frequencies. The accurate analysis of the RI from 2.7 to 3.4 can be realized. The sensitivity and the average detection limit are 1.287 THz/RIU and 7.46 × 10-4 RIU. The figure of merit is up to 83.03 RIU−1. Similarly, the structure is also competent to detect RI of another kind of dielectric layer from 2.2 to 2.85. The corresponding parameters are 1.241 THz/RIU, 7.12 × 10-4 RIU, and 77.53 RIU−1, respectively. Meanwhile, the effects of the incident angle and machining inaccuracies are also discussed.

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“…As a result of the thin thickness of the InSb layers and the lack of external magnetic fields, the ordinary dielectrics in this model are not affected. For experimental applications, gradient magnetic field coils were designed by Xuan et al 34 since the magnetic field area exerted on a particular InSb layer is relatively small, while other dielectric layers are not affected. As can be seen from the results presented in this paper, an electric current can be used to generate a spatial linear magnetic field that is in compliance with the requirements of this paper by isolating the influence of magnetic fields adjacent to different layers of InSb.…”

Section: Theoretical Modelmentioning

confidence: 99%

The multiple physical quantity sensor based on cylindrical photonic crystals with XOR logic gates

Zhang¹,

Sui²,

Liu³

et al. 2023

Phys. Chem. Chem. Phys.

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A Smoothly-Connected Crescent Transverse Gradient Coil Design for 50mT MRI System

Cited by 15 publications

References 22 publications

Janus Metastructure Based on Magnetized Plasma Material with and Logic Gate and Multiple Physical Quantity Detection

Janus Metastructure Based on Magnetized Plasma Material with and Logic Gate and Multiple Physical Quantity Detection

A functionality-switchable device based on coherent perfect absorption with narrowband absorbing performance and sensing function

The multiple physical quantity sensor based on cylindrical photonic crystals with XOR logic gates

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