U.S. Particle Accelerator School

Basics of Superconductivity, Superconducting Accelerator Magnets and RF Cavities course

Sponsoring University:

SUNY Stony Brook


Basics of Superconductivity, Superconducting Accelerator Magnets and RF Cavities


Peter Schmueser, University of Hamburg and DESY; Ramesh Gupta, Lawrence Berkeley National Lab

Three major topics will be addressed in this course, i.e. basics of superconductivity, superconducting accelerator magnets, and superconducting rf cavities. The content of the basics of conductivity includes Meissner effect and London equations, distinction between Type I and Type II superconductors, ideas and important results of the BCS theory, vector potential in quantum theory, quantization of magnetic flux, hard superconductors, flux creep, results of the Ginzburg-Landau theory, Josephson effect, superconductors in microwave fields, and surface resistance. On the superconducting magnets, we discuss general principles, and have an overview of existing designs, practical superconductors for magnets, field calculations, mechanical accuracies and magnetic forces, persistent magnetization currents, eddy currents in sc magnets, time-dependent field distortions, quenches and magnet protection, impact of field errors on accelerator performance and correction methods, and techniques of field and multipoles measurements. On the superconducting rf cavities, we will discuss high-frequency systems for particle acceleration, cavity fundamentals, comparison of normal and superconducting cavities, cavity tests, performance limitations and experimental methods, materials for sc cavities, superconducting cavity designs for present and future high energy accelerators, production and preparation methods for sc cavities, cavity with beam loading, frequency tuning, higher order modes, and the quest for the highest gradient. Prerequisites: Some familiarity with electromagnetism.