600 MHz spectrometer magnet

Williams, J.E.C.; Pourrahimi, S.; Iwasa, Y.; Neuringer, L. J.; Motowidlo, L. R.

doi:10.1109/20.92643

Cited by 21 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Spot welding (or resistive welding), a technique commonly employed to join sheet metal, has also been used to join NbTi filaments [25,37,43,46,47]. The technique involves pinching the workpieces between two electrodes (locally piercing the surface oxides) and passing a high current, short duration pulse.…”

Section: Spot Welded Jointsmentioning

confidence: 99%

See 1 more Smart Citation

Persistent current joints between technological superconductors

Brittles

Mousavi

Grovenor

et al. 2015

Supercond. Sci. Technol.

119

View full text Add to dashboard Cite

Persistent current joints are crucial components of superconducting magnets—enabling the production of the high and ultra-stable magnetic fields required, for instance, for magnetic resonance measurements. At this critical juncture when persistent mode magnets containing commercial high temperature superconductors may soon become a reality, it is of value to take stock and evaluate current challenges faced in the field of jointing. This paper provides a review of progress made to date on the production and characterization of joints between the five major technological superconductors—NbTi, Nb3Sn, MgB2, BiSCCO and REBCO, including the materials that are used to make these joints.

show abstract

Section: Spot Welded Jointsmentioning

confidence: 99%

“…This technique is therefore of interest for joining NbTi given the problems associated with oxidation. The irreversible phase changes that result from the high temperatures encountered in spot welding may mean this method is not appropriate for joining Nb 3 Sn/Al wires [47].…”

Section: Spot Welded Jointsmentioning

confidence: 99%

Persistent current joints between technological superconductors

Brittles

Mousavi

Grovenor

et al. 2015

Supercond. Sci. Technol.

119

View full text Add to dashboard Cite

show abstract

“…Some methods for fabricating SJ between the NbTi alloy conductors have been developed, such as soldering [5], [6], cold-pressing welding, diffusion welding [7], spot welding [8], [9], ultrasonic welding [10], diffusion bonding, and solder matrix replacement [2]. Among these methods, the solder matrix replacement method has the advantage of convenience.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of NbTi Superconducting Joints for 400-MHz NMR Application

Cheng

Liu

Zhang

et al. 2012

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

NbTi superconducting joints (SJs) for a 400-MHz nuclear magnetic resonance (NMR) magnet system were fabricated using the superconducting solder matrix replacement in an open-air condition. A detection device for testing the resistance of SJ has been established. The results show that the overall resistance of SJs is 9.58 × 10 −12 Ω under the background field of 1 T by summation of individual joint resistance. The resistance of SJs and the capability for current load should meet the demands of the NMR system. The SJs are placed inside the cylindrical vessel above the magnet. The magnetic flux inside the top of the vessel is no more than 0.3 T to assure performance of joints. As results, there is only 0.0001 ppm for homogeneity deviation caused by SJs on this NMR system, and therefore, the negative effect is negligible.

show abstract

“…The NbTi superconducting alloy multi-filament wire is the most widely used commercial superconductor. There are many exiting methods of fabricating NbTi superconducting joint, such as soldering [3], cold-pressing [4,5], diffusion welding [6], spot welding [7], ultrasonic welding [8], diffusion bonding and solder matrix replacement [9]. Among them, cold-pressing is comparatively convenience.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of NbTi superconducting joint by electromagnetic forming method

Cheng

Zhou

et al. 2015

2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD)

View full text Add to dashboard Cite

The electrical jointing of superconducting wires / tapes is a key issue for the construction of the scientific superconducting magnet that required high field stability, such as NMR, FTICR-MS and some inertial navigators. In this paper, the preliminary experiment of electromagnetic formed NbTi superconducting joint was done. The fabrication technique was researched by changing the parameters. The joint resistances were tested in liquid helium using coil current decay method. The contact resistance properties of the superconducting joint were investigated. The plastic deformation and the electrical contact characteristics of the NbTi superconducting joint were discussed. The results show that the electromagnetic formed NbTi superconducting joint has the excellent low-resistance property and good repeatability.

show abstract

600 MHz spectrometer magnet

Cited by 21 publications

References 2 publications

Persistent current joints between technological superconductors

Persistent current joints between technological superconductors

Fabrication of NbTi Superconducting Joints for 400-MHz NMR Application

Fabrication of NbTi superconducting joint by electromagnetic forming method

Contact Info

Product

Resources

About