Normal domains in Rutherford-type superconducting cables

Normal zone propagation in Rutherford-type superconducting cables

We study the formation and propagation of a normal zone in Rutherford-type superconducting cables. We use a rectangular conductor model to account for the electric current redistribution process between the multifilamentary strands in the presence of a normal zone. We obtain and integrate numerically the diffusion equations for the temperature and the current density distributions. Our simulati...

Current redistribution around the superconducting-to-normal transition in superconducting Nb-Ti Rutherford cables

Abstract. Sufficient thermal-electromagnetic stability against external heat sources is an essential design criterion for superconducting Rutherford cables, especially if operated close to the critical current. Due to the complex phenomena contributing to stability such as helium cooling, inter-strand current and heat transfer, its level is difficult to quantify. In order to improve our underst...

EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH Laboratory for Particle Physics (MAS) CUDI: A MODEL FOR CALCULATION OF ELECTRODYNAMIC AND THERMAL BEHAVIOUR OF SUPERCONDUCTING RUTHERFORD CABLES

Analysis of the quench propagation along Nb3Sn Rutherford cables with the THELMA code. Part I: Geometric and thermal models

The paper describes the new lumped thermal model recently implemented in THELMA code for the coupled electromagnetic–thermal analysis of superconducting cables. A new geometrical model is also presented, which describes the Rutherford cables used for the accelerator magnets. A first validation of these models has been given by the analysis of the quench longitudinal propagation velocity in the ...

Inter-Strand Resistance Measurements in Cored Nb-Ti Rutherford Cables

Cored Nb-Ti Rutherford cables with high crossover resistance R, a re being investigated to minimize ac losses in a set of superconducting dipole magnets for the proposed rapid cycling heavy ion synchrotron facility a t the Gesellschaft fiir Schwerionenforschung (GSI) in Darmstadt, Germany. This ring of magnets is based on the Relativistic Heavy Ion Collider (RHIC) design. R, in cored cables is ...