U.S. Particle Accelerator School
U.S. Particle Accelerator School
Education in Beam Physics and Accelerator Technology

Injection and Extraction of Beams

Sponsoring University:

UC Davis Continuing and Professional Education

Course Name:

Injection and Extraction of Beams
This class is full. Please contact uspas@fnal.gov to have your name added to the waiting list.


Uli Wienands and Joseph Calvey, Argonne National Lab

Purpose and Audience
This course provides an introduction to the physics and design of ring injection and extraction systems. Proton, ion, and electron systems will be covered. The course is appropriate for anyone with some background in accelerator physics and technology and with an interest in injection and extraction of beams, including operational staff.

Students should have basic knowledge of accelerator physics. Matrix optics, closed orbit and dispersion should be familiar to the student. The student should have some idea about transverse and longitudinal beam motion in a circular accelerator or storage ring. The introductory or advanced USPAS general accelerator physics courses will in general provide the necessary foundation.

It is the responsibility of the student to ensure that they meet the course prerequisites or have equivalent experience.

The students are expected to learn the fundamental concepts for designing ring injection and extraction systems. Upon completion of this course, they will be able to apply this knowledge to real-life ring design and operation.

Instructional Method
The course includes four series of lectures in the morning. The afternoon will be spent solving real-life problems, in computer lab as provided & applicable and/or in lectures. Homework problem sets will be assigned every day and students are expected to work on them after scheduled class sessions and return them by the next day, when the homework solutions will be reviewed. There will be an open-book exam during the last day. The instructors will be available at all times.

Course Content
The principles of injection and extraction will be introduced first and the student will gain an appreciation for the wide variety of details concerning injection and extraction. Examples drawn from existing rings will be presented along with the particular strengths of those designs. In-depth coverage of specific topics will include:
* Fundamentals of beam transfer
* Matching of beam to machine acceptance
* Emittance preservation
* On-axis injection
* Stripping injection of H– ion beams
* Off-axis injection of electron beams
* Extraction of beams including resonant slow extraction
* Bunch-current equalization
* Compensation of pulsed-magnet ringing
* Practical tuning strategies for injection & extraction systems.
* Examples of injection systems for colliders and synchrotron light sources.
* Advanced schemes (non-linear magnets, crystals)

Reading Requirements
(to be provided by the USPAS) "Handbook of Accelerator Physics and Engineering" (second edition) by Alexander Chao and Maury Tigner, World Scientific (2013). Students are also encouraged to bring along their favorite accelerator physics and technology books.

Credit Requirements
Students will be evaluated based on performance as follows: final exam (30% of final grade), and homework assignments (70% of final grade).

USPAS Computer Requirements
There will be no Computer Lab and all participants are required to bring their own portable computer to access online course notes and computer resources. This can be a laptop or a tablet with a sufficiently large screen and keyboard. Windows, Mac, and Linux-based systems that are wifi capable and have a standard web browser and mouse are all acceptable. You should have privileges for software installs. If you are unable to bring a computer, please contact uspas@fnal.gov ASAP to request a laptop loan. Very limited IT support and spare loaner laptops will be available during the session.

Indiana University course number: Physics 671 "Advanced Topics in Accelerator Physics"
Michigan State University course number: PHY 963
MIT course number: 8.790 "Accelerator Physics"