Design and Performance of the First Dual-Coil Magnet at the Wuhan National High Magnetic Field Center

Peng, Tao; Sun, Quqin; Zhang, X.; Xu, Qiang; Xiao, Houxiu; Herlach, F.; Pan, Yuan; Li, L.

doi:10.1007/s10909-012-0677-5

Cited by 23 publications

(3 citation statements)

References 9 publications

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“…Ultra-strong fibres are the preferred reinforcing material since they can easily be applied in tangential direction. An impressive number of record fields has been obtained with this method pioneered in Leuven [25][26][27][28][29]. However the unidirectional composite (fibre plus epoxy) produced in this way has the disadvantage of negligible strength in any other direction than the tangential direction.…”

Section: Reinforcementmentioning

confidence: 99%

State of the art and developments of high field magnets at the “Laboratoire National des Champs Magnétiques Intenses”

Debray

Frings

2013

Comptes Rendus. Physique

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Aimant pour champs intenses Aimant pour champs pulsés Aimant pour champs continus Champ magnétique intenseThe "Laboratoire National des Champs Magnétiques Intenses" (LNCMI) is the result of the merger of the "Laboratoire des Champs Magnétiques Intenses" in Grenoble specialised in the generation of DC magnetic fields and the "Laboratoire National des Champs Pulsés" in Toulouse specialised in the generation of pulsed magnet fields. DC fields of up to 35 T, pulsed fields up to 80 T and single-shot pulsed fields up to 170 T are provided to an international community of users. In the present paper we present the current state of our installations and the developments which are pursued in the context of an increasing international competition.

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Section: Reinforcementmentioning

confidence: 99%

State of the art and developments of high field magnets at the “Laboratoire National des Champs Magnétiques Intenses”

Debray

Frings

2013

Comptes Rendus. Physique

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“…After satisfying the therapeutic demands, the practical possibility of realizing the MQS array is considered and discussed based on our previous experience in developing coils and the advanced coil manufacturing technology in the State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Wuhan Nation High Magnetic Field Center (WHMFC) [36][38] [39]. The quadrantal coil in this paper can be wound by copper wires with a cross-section of 3mm×4mm and conductivity of 5.998×10 7 S/m.…”

Section: B Comparison Of the Intracranial Induced E-fields Between Th...mentioning

confidence: 99%

Design and Optimization of a Novel Multi-Quadrant Spatial Array for Non-Invasive Focalized Magnetic Stimulation of the Deep Brain

Fang,

Xiang Li,

Lian Jing

et al. 2024

IEEE Access

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As a non-invasive neuromodulation technique, transcranial magnetic stimulation (TMS) has shown great potential in scientific research and clinical application. Using TMS to stimulate the deep brain is important for enhancing the therapeutic effects of mental disorders and explaining the causes of mental disorders. However, the intracranial induced electric field (E-field) generated by conventional magnetic stimulation coils dissipates severely with increasing stimulation depth and the focalized stimulation is limited to superficial areas. In this paper, we first propose a novel multi-quadrant spatial array (MQS array) based on curved-shaped coils. Each coil in the MQS array is tangent to the head and bent away from the human head, which is conducive to reducing the accumulation of non-longitudinal induced E-field components and improving the stimulation focalization in the deep brain. Then, we propose a new spatial magnetic array optimization method based on the BP-NSGA-II algorithm. The predictive models of deep brain transcranial magnetic stimulation characteristics of the spatial array are obtained by the BP neural network and the multi-objective optimization of the stimulation currents applied in the spatial array is performed with the NSGA-II algorithm. Results show that the MQS array can produce an obvious focusing area at 10 cm below the scalp which satisfies the depth requirement of deep brain transcranial magnetic stimulation. Under the same constraint of Joule loss, the optimized MQS array can enhance intracranial stimulation intensity by 131%, increase the longitudinal attenuation ratio to 4.5 times, and reduce the focusing area by 76% compared to the conventional planar magnetic stimulation array. The proposed MQS array has significant advantages in deep brain focalized stimulation, and the spatial array optimization method described in this study may provide a valuable reference for coil or array optimization processes in other application contexts.

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“…A lot of work has already been done on this subject [22], [24]- [29]. A simplified model of a solenoid with infinite length was firstly presented [24], but the axial stress is not included and the accuracy is not enough.…”

Section: Introductionmentioning

confidence: 99%

A Modified Mechanical Model for the Optimization of High Field Solenoid Magnets

Chen

Xiao

et al. 2020

IEEE Access

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A modified mechanical model for the stress analysis of solenoid pulsed magnets is presented, which includes the influence of bending on the plane stress analysis. The bending effect in the axial direction is included by introducing the discrete axial strain with the assumption of the uniform distribution of the axial force load. The modified model improves the accuracy remarkably compared to the classical Generalized Plane Strain (GPS) analysis. The results are verified with the FEA software. The algorithm of identifying the optimum positions of the separations between windings is also proposed. This model achieves both high efficiency and high precision, which are of great significance to optimize high field solenoid pulsed magnets and explore the existing potential for higher magnetic fields. INDEX TERMS Bending, high magnetic field, pulsed magnet, separation, stress analysis.

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Design and Performance of the First Dual-Coil Magnet at the Wuhan National High Magnetic Field Center

Cited by 23 publications

References 9 publications

State of the art and developments of high field magnets at the “Laboratoire National des Champs Magnétiques Intenses”

State of the art and developments of high field magnets at the “Laboratoire National des Champs Magnétiques Intenses”

Design and Optimization of a Novel Multi-Quadrant Spatial Array for Non-Invasive Focalized Magnetic Stimulation of the Deep Brain

A Modified Mechanical Model for the Optimization of High Field Solenoid Magnets

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