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Permanent multipole magets, such as quadrupole, sextupole and octupole are examined. The high order multipoles made from permanent magnets have achieved higher strengths, for a given bore radius, than the superconducting magnets.

The test results of a 500 m High Temperature Superconducting (HTS) power cable are discussed. Results suggest the observation of local degradation in the HTS shield due to less thickness of the protective layer.

The short circuit testing of High Temperature Superconducting (HTS) power cable is discussed. Results suggest non-variation of critical current before and after each fault.

The quench properties of a 500-m High Temperature Superconducting (HTS) power cable are discussed. Findings reveal the correlation of the quench propagation with the phase difference of the conductor current and the leakage field.

Reporting the results of experimental study of Bi-2223 thick films on a MgO substrate prepared by a coating method and CIP technique is discussed. It is found that the J(sub c) and T(sub c) of the prepared thick film depend on its thickness and the compositional deviation is caused by volatilization of Pb during sintering process.

Research involving fault current limiters for electric power systems is described and discussed.

A magnetic shielding type of superconducting fault current limiter was investigated to determine thermal and magnetic properties of bulk superconductor.

A study was conducted on high temperature superconducting (HTS) fault current limiters (FCLs) for electric power system applications. A magnetic shielding type FCL consisting of a superconducting cylinder, iron core, control coil and a copper primary winding was developed. The superconducting cylinder employs a Bi-2212 thick film on a MgO substrate while the control coil is made up of metallic rings.

The fabrication of semiconducting Sr(1-x)NdxCuOy thin films on SrTiO3 substrates via radio-frequency magnetron sputtering and laser pulse deposition was reported. The sputtered-grown films had an infinite-layer lattice structure and exhibited both single and complex phases. The laser-ablated films whose x

We have been developing an inductive type superconducting fault current limiter with a superconducting cylinder. For practical use, a high critical current density (Jc) is needed in a large diameter. To achieve these items, we have developed a Bi-2223 thick film on a MgO substrate, with a Bi-2212 buffer layer. This cylinder was 450 mm in diameter and 120 mm in length. We describe the superconductive characteristics of this cylinder, and the limiting properties of the fault current limiter using these cylinders. [ABSTRACT FROM AUTHOR]

A 500-m single-core high temperature superconducting (HTS) cable system has been constructed and tested in Yokosuka area, CRIEPI, by CRIEPI, The Furukawa Electric and Super-GM. In the actual power grid, the HTS cable distance extends sometimes several km. And has to be cooled down from about room temperature to liquid nitrogen temperature. As, the HTS cable is contracted and suffers mechanical stress. In the case of the tong distance HTS cable, it remains a major development issue. The FITS cable constructed in this test system has an offset section for absorbing the thermal contraction. In this paper, we describe the validity of that offset section and the thermomechanical characteristics on the cooldown and warm-up test. The offset functioned successfully as designed. [ABSTRACT FROM AUTHOR]

A high-temperature superconducting (HTS) power transmission cable is considered as one of the next-generation power transmission technologies. The introduction of HTS cables into the actual power grid requires a long-distance cooling tube, due to the location of the cooling stations at intervals of several kilometers along the cable length. Therefore, it is essential to understand the flow property of the liquid nitrogen as a coolant for the HTS cable, the current flow properties, electrical insulation characteristics, thermal insulation properties and mechanical behavior for the HTS cable taking into account its long length. This paper provides a brief summary of the HTS cable test system with a length of 500 m constructed in the Yokosuka area of CRIEPI. [ABSTRACT FROM AUTHOR]

The 500-m high temperature superconducting (HTS) cable has been constructed in the Yokosuka area, CRIEPI, by CRIEPI, The Furukawa Electric Co. and Super-GM. Its design voltage is 77 kY and the thickness of the electrical insulation layer should be 8 mm made of semi-synthetic paper (polypropylene laminated paper). During cooling, the capacitance and dielectric loss tangent were measured periodically. After cooling, which means that the HTS cable was fully filled with liquid nitrogen (LN2), the initial voltage withstand test was carried out. This paper describes the design method of the electrical insulation layer including determination of the testing voltage and the result of the initial voltage withstand test, and the permittivity calculated from the capacitance, and dielectric loss tangent. [ABSTRACT FROM AUTHOR]