386 research outputs found
Self Field Measurements by Hall Sensors on the SeCRETS Long Sample CICCs in SULTAN
Get PDFThe aim of this work is to determine the existence and degree of the current unbalance of two types of cable-in-conduit conductors (CICC) of the SeCRETS long sample experiment, and its influence on the conductors' performance. The self-field measurements are performed by using six sets of annular Hall sensors, each containing six sensors, and two linear arrays with ten sensors. The change of the self-field is associated with the redistribution of the transport current between the strands inside the conductor during and after a ramp of current, due to changes of the applied magnetic field or temperature of the conductor. During the DC, AC losses and stability tests, the signals from the Hall sensors were recorded. In DC tests, a clear change of the self-field pattern is observed in the high field region when either current or temperature approached their critical (I/sub cs/ and T/sub cs/) values. No change in the self-field pattern is observed in the experiments with pulsed fields. The method requires improvements for a reasonable quantitative assessment of the current unbalance in the conductor
Superconducting magnet system for the ATLAS detector at CERN
No full textThe ATLAS Collaboration has started the construction of the superconducting magnet system of the ATLAS Experiment which will be installed in the ring of the new Large Hadron Collider at CERN, operational in year 2005. The ATLAS detectors require, for the particle separation, a specific distribution of magnetic field that will be generated by a system of superconducting coils. The system with overall dimensions of 20 meter diameter and 26 meter length consists of three toroidal magnets and a 2.5 m diameter central solenoid. The system is unique in size and complexity. In this paper, the various magnets are introduced as well as the common infrastructure and services required. The status of the project is also reviewed. (7 refs)
New devices for measuring the critical current in a tape as a function of the axial and transverse strain, the magnetic field and temperature
No full textDesign Opportunities of Nb3Sn Coils for Accelarator Magnets Wound from Monolithic Conductors
No full textThe strain dependence of ITER related Nb3Sn superconductors in the temperature range from 4 to 10 kelvin
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