Academic Training - Pulsed SC Magnets

Lecture 1. Introduction to Superconducting Materials

Type 1,2 and high temperature superconductors; their critical temperature, field & current density. Persistent screening currents and the critical state model.

Lecture 2. Magnetization and AC Loss

How screening currents cause irreversible magnetization and hysteresis loops. Field errors caused by screening currents. Flux jumping. The general formulation of ac loss in terms of magnetization. AC losses caused by screening currents.

Lecture 3. Twisted Wires and Cables

Filamentary composite wires and the losses caused by coupling currents between filaments, the need for twisting. Why we need cables and how the coupling currents in cables contribute more ac loss. Field errors caused by coupling currents.

Lecture 4. AC Losses in Magnets, Cooling and Measurement

Summary of all loss mechanisms and calculation of total losses in the magnet. The need for cooling to minimize temperature rise in a magnet. Measuring ac losses in wires and in magnets.

Lecture 5. Stability and Quenching

The problem of training and the consequent need for a stability margin in the conductor. The quench process, methods of calculation and quench protection schemes

ENSEIGNEMENT ACADEMIQUE
ACADEMIC TRAINING
Françoise Benz 73127
academic.training@cern.ch

If you wish to participate in one of the following courses, please tell to your supervisor and apply electronically from the course description pages that can be found on the Web at: http://www.cern.ch/Training/ or fill in an 'application for training' form available from your Departmental Secretariat or from your DTO (Departmental Training Officer). Applications will be accepted in the order in which they are received.

by Françoise Benz