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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.}, }