Enseignement académique - Pulsed SC Magnets
2005-2006 ACADEMIC TRAINING PROGRAMME
LECTURE SERIES 2, 3, June
29, 30, 31 May, 1, 2 June
11:00-12:00 - Auditorium, bldg 500
Pulsed SC Magnets
by M. Wilson
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
Si vous désirez participer à l'un des cours suivants, veuillez en discuter avec votre superviseur et vous inscrire électroniquement en direct depuis les pages de description des cours dans le Web que vous trouvez à l'adresse : http://www.cern.ch/Training/ ou remplissez une «demande de formation» disponible auprès du Secrétariat de votre Département ou de votre DTO (Délégué du département à la formation). Les places seront attribuées dans l'ordre de réception des inscriptions.
par Françoise Benz