scholarly journals Effects of Crack Size Distribution and Voltage Probe Spacing on Variation of Critical Current and n-Value along the Longitudinal Direction in Superconducting Tape with Cracks

2018 ◽  
Vol 59 (8) ◽  
pp. 1380-1388 ◽  
Author(s):  
Shojiro Ochiai ◽  
Hiroshi Okuda ◽  
Noriyuki Fujii
Keyword(s):  
Size Distribution ◽  
Critical Current ◽  
Longitudinal Direction ◽  
Crack Size ◽  
Superconducting Tape ◽  
Voltage Probe ◽  
Probe Spacing

STUDY OF THE TEXTURING IN BSCCO-AG TAPES THROUGH MAGNETIC MEASUREMENTS

2000 ◽  
Vol 14 (25n27) ◽  
pp. 3159-3164
Author(s):  
C. FERDEGHINI ◽  
M. R. CIMBERLE ◽  
G. GRASSO ◽  
P. GUASCONI ◽  
A. MALAGOLI ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Magnetic Measurements ◽  
Texture Evolution ◽  
Rolling Direction ◽  
Longitudinal Direction ◽  
Magnetic Method ◽  
Superconducting Compounds

We have developed a method that allows, by a simple set of magnetic measurements, to study the texturing of the grains inside a BSCCO-Ag tape. Because the texture is anisotropic we define the angle ϑ L that identifies the mean grain misalignment angle with respect to the tape surface in longitudinal direction (i.e. rolling direction) and the angle ϑ T in transverse direction. The technique is based on the assumption that, because of the very high anisotropy of the critical current density in BSCCO superconducting compounds, the magnetic moment is essentially generated by the current circulating in the a-b planes of the BSCCO grains. The different magnetisation cycles, measured when the orientation of the magnetic field with respect to the tape surface is changed, depend only on the grain orientation inside the tape, which determines the effective magnetic field component normal to the a-b planes of the grains. Here we present the texture evolution of the BSCCO grains inside silver sheated multifilamentary tape starting from the initial steps of the mechanical deformation up to the final heating stage. The results obtained from the magnetic method are compared with those obtained with other methods, i.e. X-ray diffraction and critical current density anisotropy. Also results obtained on samples prepared in different way will be presented.

scholarly journals CRITICAL CURRENT PROPERTIES OF Bi2Sr2Ca1Cu2Ox/Ag SUPERCONDUCTING TAPE

1992 ◽  
Vol 4 (1) ◽  
pp. 34-39,f3
Author(s):  
K. Togano ◽  
H. Kumakura ◽  
H. Kitaguchi ◽  
H. Maeda ◽  
J. Shimoyama ◽  
...  
Keyword(s):  
Critical Current ◽  
Superconducting Tape

Sausaging Mechanism and Effect on Critical Current Density in Bi2223/Ag Superconducting Tape

1997 ◽  
pp. 843-846
Author(s):  
Kazutaka Yamamoto ◽  
Hiroko Onoda ◽  
Yutaka Yamada ◽  
Tsutomu Koizumi ◽  
Takayo Hasegawa ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Superconducting Tape

Sensitivity Analysis of Major Parameters on Piping Failure Probabilities

2004 ◽  
Vol 261-263 ◽  
pp. 821-826
Author(s):  
Sung Gyu Jung ◽  
Chang Soon Lee ◽  
In Gyu Park ◽  
Se Hwan Lee ◽  
Tae Eun Jin
Keyword(s):  
Sensitivity Analysis ◽  
Size Distribution ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Crack Size ◽  
Deterministic Approach ◽  
Inspection Interval ◽  
Different Types ◽  
Failure Probabilities

In-service inspections (ISI) of pipes in the nuclear power plants are currently performed based on mandated requirements in the ASME Section XI, which is based on deterministic approach of the critical welds. The 20 years of ISI experience in U.S.A. has revealed less correlation between the critical welds and actual failures, and much conservatism in current ISI requirements. To reduce those problems, risk-informed ISI technology has been developed and proved to be useful. This paper presented a method for predicting piping failure probabilities in an application of risk-informed ISI, and analyzed the effect of input parameters on piping failure probabilities. Results generated using this approach revealed that the calculated failure probabilities can be sensitive to the different types of stressors, crack size distribution, inspection interval, etc..

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