โ Scribed by Takataro Hamajima; A.K.M. Alamgir; Naoyuki Harada; Makoto Tsuda; Michitaka Ono; Hirohisa Takano
No coin nor oath required. For personal study only.
An imbalanced current distribution which is often observed in cable-in-conduit (CIC) superconductors composed of multistaged, triplet type sub-cables, can deteriorate the performance of the coils. It is, hence very important to analyze the current distribution in a superconductor and ยฎnd out methods to realize a homogeneous current distribution in the conductor. We apply magnetic ยฏux conservation in a loop contoured by electric center lines of ยฎlaments in two arbitrary strands located on adjacent layers in a coaxial multilayer superconductor, and thereby analyze the current distribution in the conductor. A generalized formula governing the current distribution can be described as explicit functions of the superconductor construction parameters, such as twist pitch, twist direction and radius of individual layer. We numerically analyze a homogeneous current distribution as a function of the twist pitches of layers, using the fundamental formula. Moreover, it is demonstrated that we can control current distribution in the coaxial superconductor.
๐ SIMILAR VOLUMES
The transport current distribution in a simple mono-core non-striated DyBCO tape in LN2 was measured by a contactless nondestructive method based on Hall probe magnetometry. Transport current was gradually increased to 150 A/cm, which is well under a critical current level of 250 A/cm. Nevertheless,