Speaker
Description
About the lecture:
The course tries to summarise over 60 years of theory and experiments on AC losses in LTS and HTS magnets. The participants will learn definitions, where to find and how to use analytical tools for loss calculations. The course provides a list of references (past courses, publications and books) for deeper studies and further reading. Several examples for both low and high temperature superconductors are provided. The participants will find the tools to solve specific problems, but substantial amount of time should be then dedicated to master these tools.
Course plan:
• Definitions and historical development of AC loss research. Why AC losses matter in magnets design?
• Losses in superconducting magnets and losses in superconducting electro-technical devices (motors, cables, transformers,…).
• AC losses as magnetisation: M-H diagram and examples for hysteretic, coupling and eddy current losses
• Analytical models and example of application (LTS and HTS) for hysteretic, coupling and eddy current losses.
• Numerical methods to compute AC losses.
• AC losses in strands, cables and magnets: how to scale up in complexity?
• Loss map: a simple way to draw the complex landscape of hysteretic, coupling and eddy current losses in strand and cables.
• Survey of electrical and calorimetric methods for measuring AC losses.
About the speaker:
Two years as junior researcher at Pirelli — AC loss in Bi223 power cables
University of Geneva PhD in Physics — electromechanical characterization and microstructure of Nb3Sn
NIMS, Japan — development of high field magnet with coated conductors
EPLF — research on HTS (mainly coated conductor but also Bi2223 and Bi2212) for high field solenoids and cables for fusion magnets
