Beam-Based Diagnostics

Sponsoring University:

Northern Illinois University

Course Name:

Beam-Based Diagnostics
This class is full. Please contact uspas@fnal.gov to add your name to the waiting list.

Instructors:

Christoph Steier and Thorsten Hellert, Lawrence Berkeley National Lab; Xiaobiao Huang, SLAC National Accelerator Lab

Purpose and Audience
The purpose of this graduate-level course is to give an overview of beam-based diagnostics (centered mostly on circular accelerators) including practical computer examples. The course is intended for graduate students, postdoctoral fellows, and other early-career scientists and engineers who want to get a start into this modern and advanced field. It is also appropriate for select accelerator operators that want to get a better understanding of advanced measurement methods.

Prerequisites
Working familiarity with basic accelerator physics, electrodynamics and classical mechanics as provided by the USPAS course "Fundamentals of Accelerator Physics and Technology with Simulations and Measurements Lab".

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

Objectives
Charged particle storage rings are used for a variety of science and technology applications -- for example as synchrotron radiation light sources for biology, chemistry, and materials science, as colliders for high-energy physics or as damping rings to reduce the beam emittance for linear colliders. The dynamic aperture limits the performance in many of these current accelerators. To optimize the performance, a good knowledge of the machine model is required. To achieve the required accuracy of the machine model, beam based measurements have proven to be essential. This course will start with the fundamental beam dynamics concepts and beam measurement methods and will describe more and more complex examples of beam-based diagnostics applications used to understand and optimize machine performance.  On successful completion of the course, students will be prepared to utilize a broad range of beam-based diagnostics in contemporary accelerator systems.

Instructional Method
The course will consist of approximately 15 lectures, mostly during morning sessions. In addition, there will be computer exercises every afternoon demonstrating concepts presented in the lectures as well as introducing software tools in Matlab, including AT and LOCO, to analyze beam-based diagnostics measurements (like orbit response matrices, phase advance data, etc.). The afternoons will also include some of the lectures plus some less formal discussion sessions. In addition there will be 4 homework sets to be solved in the evenings.

Course Content
We will present beam-based methods for characterizing and controlling the linear and nonlinear optics of a storage ring. We will cover tune, chromaticity, and dispersion measurement; beam-based alignment; orbit response matrix analysis; analysis of turn-by-turn orbit data; beam size measurement; methods of coupling correction; measurement of dynamic aperture; measurement of energy aperture; characterization of resonances; tune shift with amplitude; model independent analysis; and impedance characterization using turn-by-turn and closed orbit measurements.

Reading Requirements
(to be provided by USPAS) “Particle Accelerator Physics,” Springer-Verlag Publishers (third edition, 2007) by Helmut Wiedemann.

No previous reading is required, but basic familiarity with transverse beam dynamics as found in “Basic Course on Accelerator Optics” by J. Rossbach and P. Schmueser (CERN publication) and “An Introduction to the Physics of High Energy Accelerators”, Wiley & Sons Publishers (1993) by Donald A. Edwards and Michael J. Syphers or “Accelerator Physics” by S.Y. Lee. World Scientific, 1999 is advantageous.

Credit Requirements
Student grades will be evaluated based on performance as follows: final exam (25%), homework assignments (40%), class participation (25%), computer exercises (10%).

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.

Northern Illinois University course number: PHYS 790D Special Topics in Physics - Beam Physics
Indiana University course number: Physics 671, "Advanced Topics in Accelerator Physics"
Michigan State University course number: PHY 963, "U.S. Particle Accelerator School"
MIT course number: 8.790, "Accelerator Physics"