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Graduate Student Seminar - 12/02/2011

"Preliminary Study of Beam Halo in UMER"

by Hao Zhang

Friday, December 2, 2011 -- 12:00 p.m.
Large Conference Room, 1207 Energy Research Facility

Advisors:  Professor Patrick O'Shea, Research Professor Rami Kishek, and Dr. Ralph Fiorito

In accelerator physics, beam halo is the low density tail of the particle beams which is a common phenomenon occurring in most intense particle accelerators. The halo is associated with many negative effects which will reduce the beam quality, damage the system, and increase the error to the detection. There are many theories describing the dynamics of the halo particles. In this talk, I will concentrate on the particle core model and give a solution to minimize halo by matching the beam through the injection section in the University of Maryland Electron Ring (UMER). Experimentally, halo is very hard to characterize because of its low intensity, which requires a measurement system with high dynamic range (≥10sup>5). We also introduce a possible halo monitor with high dynamic range using a device called digital micro-mirror array, which will help the research of the beam halo dynamic in UMER in the future.

For additional information about the IREAP Graduate Student Seminars, contact Kevin Schoeffler.

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