Augmentation of field uniformity and strength in spherical and cylindrical magnetic field sources

1991 ◽  
Vol 70 (10) ◽  
pp. 6621-6623 ◽  
Author(s):  
H. A. Leupold ◽  
E. Potenziani
Keyword(s):  
Magnetic Field ◽  
Field Uniformity

scholarly journals High-Field Pulsed ENDOR with Intra-cavity Radiofrequency Coil

2020 ◽  
Vol 51 (11) ◽  
pp. 1433-1449
Author(s):  
G. Annino ◽  
H. Moons ◽  
M. Fittipaldi ◽  
S. Van Doorslaer ◽  
E. Goovaerts
Keyword(s):  
Magnetic Field ◽  
High Field ◽  
Conversion Factor ◽  
Signal To Noise Ratio ◽  
Model Systems ◽  
Signal To Noise ◽  
Radiofrequency Coil ◽  
W Band ◽  
Radiofrequency Current ◽  
Field Uniformity

AbstractThis study compares the performance of two coil configurations for W-band pulsed ENDOR using a setup with both a radiofrequency ‘hairpin’ coil internal to a microwave non-radiative resonator and Helmholtz-like coils external to the resonator. Evaluation of the different coil performances is achieved via the ENDOR study of two model systems. The efficiencies of the coil configurations are first investigated numerically, showing that a higher radiofrequency current-to-magnetic field conversion factor can be achieved with the intra-cavity coil, with a similar radiofrequency magnetic field uniformity. This result is then confirmed by the broadband ENDOR spectra acquired with the two coil arrangements. A gain in the signal-to-noise ratio enabled by the internal coil of about a factor 10 was observed. In some cases, the high conversion factor of the intra-cavity coil led to a saturation of the ENDOR transitions. The possibility to implement a similar intra-cavity radiofrequency coil configuration in higher field spectrometers is finally discussed.

Electric Resistance Welded Seam Inspection Using Circumferential Flux

2008 ◽  
Author(s):  
Natalia K. Nikolova ◽  
Duane Cronin ◽  
Sabir M. Pasha ◽  
Reza K. Amineh ◽  
Ian Smith ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Crack Detection ◽  
Axial Direction ◽  
Metal Loss ◽  
Electric Resistance ◽  
Field Uniformity ◽  
Axial Crack ◽  
Resistance Weld ◽  
Sensor Density ◽  
Welded Seam

For conventional magnetic flux leakage (MFL) inspection where an excitation magnetic field is generated in the axial direction of a pipeline, axially oriented crack detection is impossible [1][2]. A new MFL tool design is presented that creates an excitation field in the circumferential or transverse direction, allowing for axial crack detection, as well as the more conventional metal loss detection. Design criteria that ensure detection include sufficient sensor density and magnetic field uniformity at sensor locations. The result is a new type of circumferential MFL inspection tool that can not only detect corrosion and other metal losses, but also axially oriented cracks. Based on the results of a series of inspection runs 22 crack-like features in the electric resistance weld (ERW) were investigated with 19 of those being verified as linear long seam features and were subsequently permanently repaired. Further information on the efficacy of this design is clarified in [2].

Test Results of Central Magnetic Field and Field Uniformity of a High Temperature Superconducting Magnet With Gap

2012 ◽  
Vol 22 (3) ◽  
pp. 9501905-9501905
Author(s):  
Youngmin Kim ◽  
Myunghun Kang ◽  
Myunghwan Ku ◽  
Gueesoo Cha ◽  
Kyoungho Paik ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Superconducting Magnet ◽  
Test Results ◽  
High Temperature Superconducting ◽  
Field Uniformity

Erratum: “Magnetic Field Uniformity Across the GF 9-2 YSO, L1082C Dense Core, and GF 9 Filamentary Dark Cloud” (2018, ApJ, 867, 79)

2018 ◽  
Vol 869 (1) ◽  
pp. 86
Author(s):  
Dan P. Clemens ◽  
A. M. El Batal ◽  
C. Cerny ◽  
S. Kressy ◽  
G. Schroeder ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dense Core ◽  
Dark Cloud ◽  
Field Uniformity

scholarly journals Magnetic Field Uniformity Across the GF 9-2 YSO, L1082C Dense Core, and GF 9 Filamentary Dark Cloud

2018 ◽  
Vol 867 (1) ◽  
pp. 79 ◽  
Author(s):  
Dan P. Clemens ◽  
A. M. El-Batal ◽  
C. Cerny ◽  
S. Kressy ◽  
G. Schroeder ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dense Core ◽  
Dark Cloud ◽  
Field Uniformity
Sign in / Sign up

Export Citation Format

Share Document