U.S. Particle Accelerator School

Magnetic Systems course

Sponsoring University:

University of California, Santa Cruz


Magnetic Systems: Insertion Device Design


Ross Schlueter and Soren Prestemon, Lawrence Berkeley National Lab

Purpose and Audience
The course will focus on various theoretical and practical topics of magnetics as applicable to accelerator magnets and more specifically insertion devices, which are the high performance radiation sources for synchrotron and FEL facilities.

Undergraduate Classical Mechanics and Electromagnetism course.

Instructional Method
The course consists of lectures in both morning (3 hrs. per class day) and afternoon sessions (minimum of 2 hrs. per class day). In addition, afternoon exercise sessions are planned to assign and explain homework each day.

Course Content
This course introduces the fundamentals of the design of electromagnet, pure permanent magnet, superconducting, and hybrid iron/permanent magnet systems with special attention and application to insertion devices for synchrotron storage rings and FELs. Emphasis is on practical engineering and magnetics issues, emphasizing underlying physical and mathematical principles. The stage is first set with magnetics fundamentals, beginning with a review of Maxwell’s Equations and then progresses to cover both the design of and practical implementation issues associated with wiggler and undulator insertion devices.

Topics covered include: (1) theory of electromagnet, pure permanent magnet, superconducting, and hybrid magnet design, (2) wiggler and undulator requirements and performance, (3) field strength and quality issues, (4) polarization, (5) magnetic forces, (6) coil construction and cooling; (7) permanent magnet sorting and quality, (8) field errors in insertion devices, (9) pitfalls in design and construction, (10) radiation codes and radiation characteristics, (11) novel insertion devices.

Reading Requirements
Instructor class notes "Magnetics Systems/ Insertion Devices" to be provided by the USPAS.

Credit Requirements
Students will be evaluated based on performance: final exam (40 % of final grade), homework assignments (60 % of final grade).