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@InProceedings{duncan:napac2019-tuplm18,
author = {C.J.R. Duncan and P. Cueva and J.M. Maxson and D.A. Muller},
title = {{Improving Energy Resolution and Compensating Chromatic Aberration With a TM010 Microwave Cavity}},
booktitle = {Proc. NAPAC'19},
pages = {411--413},
paper = {TUPLM18},
language = {english},
keywords = {cavity, electron, gun, simulation, laser},
venue = {Lansing, MI, USA},
series = {North American Particle Accelerator Conference},
number = {4},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {10},
year = {2019},
issn = {2673-7000},
isbn = {978-3-95450-223-3},
doi = {10.18429/JACoW-NAPAC2019-TUPLM18},
url = {http://jacow.org/napac2019/papers/tuplm18.pdf},
note = {https://doi.org/10.18429/JACoW-NAPAC2019-TUPLM18},
abstract = {The intrinsic energy spread of electron sources limits the achievable resolution of electron microscopes in both spectroscopic and spatially resolved measurements. We propose that the TM010 mode of a single radio frequency (RF) cavity be used to dramatically reduce this energy spread in a pulsed beam. We show with analytic approximations, confirmed in simulations, that the non-linear time-energy correlations that develop in an electron gun can be undone by the RF cavity running near-crest. We derive an expression that gives the required RF field strength as a function of accelerating voltage. We explore multiple applications, including EELS and SEM. By pulsing a photocathode with commercially available, high repetition-rate lasers, our scheme could yield competitive energy spread reduction at higher currents when compared with monochromated continuous-wave sources for electron microscopes.},
}