Time-resolved Measurement of Quadrupole Wake?elds in Corrugated Structures
arxiv(2016)
Abstract
Corrugated structures have recently been widely used for manipulating electron beam longitudinal phase space and for producing THz radiation. Here we report on time-resolved measurements of the quadrupole wake?elds in planar corrugated structures. It is shown that while the time- dependent quadrupole wake?eld produced by a planar corrugated structure causes signi?cant growth in beam transverse emittance, it can be e?ectively canceled with a second corrugated structure with orthogonal orientation. The strengths of the time-dependent quadrupole wake?elds for various corrugated structure gaps are also measured and found to be in good agreement with theories. Our work should forward the applications of corrugated structures in many accelerator based scienti?c facilities.
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