Generation of uniform magnetic field using a spheroidal helical coil structure

9th International Conference on Magnetic and Superconducting Materials

Öztürk, Yavuz^1,2 ; Akta, Bekir^1

Gebze Technical University (GTU), Physics Department, Gebze/Kocaeli, Turkey^1

TBITAK BILGEM, Gebze/Kocaeli, Turkey^2

关键词: Axial direction;    Coil winding;    Eddy current probes;    Field uniformity;    Helical coil;    Magnetic trap;    Theoretical study;    Uniform magnetic fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/667/1/012009/pdf
DOI  :  10.1088/1742-6596/667/1/012009

来源: IOP

【 摘 要 】

Uniformity of magnetic fields are of great importance especially in magnetic resonance studies, namely in magnetic resonance spectroscopy applications (NMR, FMR, ESR, EPR etc.) and magnetic resonance imaging applications (MRI, FMRI). Field uniformity is also required in some other applications such as eddy current probes, magnetometers, magnetic traps, particle counters etc. Here we proposed a coil winding regime, which follows the surface of a spheroid (an ellipsoid of rotation); in light of previous theoretical studies suggesting perfect uniformity for a constant ampere per turn in the axial direction thereof. We demonstrated our theoretical results from finite element calculations suggesting 0.15% of field uniformity for the proposed structure, which we called a Spheroidal Helical Coil.