High Tc monolithic helical magnets

Bromberg, L.; Sidorov, Maxim; Böck, J.; Pourrahimi, S.

doi:10.1109/20.511428

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…An accurate and complete analytical model of the magneto quasi-static (MQS) fields of solenoids is indispensable, given the long history of solenoids in a wide range of electrical applications; for example, magnets [1] and omni-directional electromagnets [2], permeameters [3], current sensors [4], magnetic heads for digital recording [5], displacement transducers [6], power system reactors [7], power regulation for in-package micro-electronics [8], through-the-wall MQS coupling [9]- [11], and magnetic induction [12], etc.…”

Section: Introductionmentioning

confidence: 99%

A Parametric Integral Formulation to Approximate the Magneto Quasi-Static Fields of 3-D Cylindrical Solenoids With Helical Winding

Zadehgol

2022

IEEE Trans. Magn.

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The solenoid has been used extensively in a wide range of electrical applications. In the present work, an analytical model is presented for estimating the 3-dimensional (3D) magneto quasi-static fields of the cylindrical solenoid with helix-shaped (helical) wire winding. The proposed integral formulation is based on the Schur (Hadamard) vector product of the current vector ⃗ I and the helical tangent vector ⃗ T , to express the magnetic vector potential ⃗ A. The model is used to estimate the magnetic flux density vector ⃗ B and the flux linkage Ψ anywhere in 3D space, excluding the (source) regions of conducting wire. A constant scaling coefficient, based on measured terminal inductance, is proposed for calibration of the model's magnetic field. Error analysis is presented on the numerical integration, based on truncated series expansion of complete elliptic integrals in terms of Chebychev polynomials. The model may be used to estimate all three cylindrical components of the magneto quasi-static fields of solenoids as a function of core diameter, wire radius, the number of wire turns per winding layer, the number of winding layers, and the complex permeability of frequency-dependent linear material. Several numerical examples are provided to validate the helical model against the superposition of circular loops, and an idealized circuit model.

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Section: Introductionmentioning

confidence: 99%

A Parametric Integral Formulation to Approximate the Magneto Quasi-Static Fields of 3-D Cylindrical Solenoids With Helical Winding

Zadehgol

2022

IEEE Trans. Magn.

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Options for the use of high temperature superconductor in tokamak fusion reactor designs

Bromberg

Tekula²,

El-Guebaly³

et al. 2001

Fusion Engineering and Design

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The application of high temperature superconductors in long term tokamak fusion reactors is analyzed in this paper. Properties of high temperature superconductors have been well documented that make them ideal for this application. Short-sample BSSCO wires and YBCO tapes approach their single-crystal performance limits. This provides a useful reference frame as well as a starting point of what may be possible in the future. In this paper, the design issues involved in the use of this technology for tokamak magnet applications will be investigated by extrapolating the properties of short sample YBCO thick films to longer lengths. The properties of YBCO operating at elevated temperatures (> 10 K) are also summarized. The limitations imposed on the performance and lifetime of the HTS materials because of the fusion environment are reviewed. The consequences of implementing the HTS design requirements in a fusion environment are then described. The HTS material may offer an opportunity for a fundamentally different magnet approach leading to either a lower cost or reduced maintenance. High field toroidal magnets with decreased shielding and with better access and easier maintenance may be feasible.3

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High Tc monolithic helical magnets

Cited by 2 publications

References 8 publications

A Parametric Integral Formulation to Approximate the Magneto Quasi-Static Fields of 3-D Cylindrical Solenoids With Helical Winding

A Parametric Integral Formulation to Approximate the Magneto Quasi-Static Fields of 3-D Cylindrical Solenoids With Helical Winding

Options for the use of high temperature superconductor in tokamak fusion reactor designs

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