Beam Diagnostics in Superconducting Accelerating Cavities: The Extraction of Transverse Beam Position from Beam-Excited Higher Order Modes by Pei ZhangBeam Diagnostics in Superconducting Accelerating Cavities: The Extraction of Transverse Beam Position from Beam-Excited Higher Order Modes by Pei Zhang

Beam Diagnostics in Superconducting Accelerating Cavities: The Extraction of Transverse Beam…

byPei Zhang

Hardcover | August 5, 2013

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An energetic charged particle beam introduced to an rf cavity excites a wakefield therein. This wakefield can be decomposed into a series of higher order modes and multipoles, which for sufficiently small beam offsets are dominated by the dipole component. This work focuses on using these dipole modes to detect the beam position in third harmonic superconducting S-band cavities for light source applications. A rigorous examination of several means of analysing the beam position based on signals radiated to higher order modes ports is presented. Experimental results indicate a position resolution, based on this technique, of 20 microns over a complete module of 4 cavities. Methods are also indicated for improving the resolution and for applying this method to other cavity configurations. This work is distinguished by its clarity and potential for application to several other international facilities. The material is presented in a didactic style and is recommended both for students new to the field, and for scientists well-versed in the field of rf diagnostics.
The author read physics at the University of Science and Technology of China (USTC) in Hefei from 2002 to 2006. After graduating with a BSc in applied physics, he worked at CERN in Geneva for one year as a visiting scholar employed by the University of Michigan (Ann Arbor). In 2009, he was awarded a MSc in Particle Physics from USTC. S...
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Title:Beam Diagnostics in Superconducting Accelerating Cavities: The Extraction of Transverse Beam…Format:HardcoverDimensions:118 pagesPublished:August 5, 2013Publisher:Springer-Verlag/Sci-Tech/TradeLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:3319007580

ISBN - 13:9783319007588

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Table of Contents

Introduction.- Electromagnetic Eigenmode Simulations of the Third Harmonic Cavity.- Measurements of HOM Spectra.- Analysis Methods for Beam Position Extraction from HOM.- Dependencies of HOM on Transverse Beam Offsets.- HOM-Based Beam Position Diagnostics.- Conclusions.- Bibliography.- Mathematics.- Eigenmodes of an Ideal Third Harmonic Cavity.- Technical Details of the HOM Measurements.