The briefing
A Nature study details a thermionic S-band standing-wave linac delivering a 12.4 MeV beam with a dominant-peak relative FWHM energy spread of about 0.48%. The design uses acceptance-guided longitudinal phase-space shaping and achieves sub-millimeter optical transition radiation focal spots.
Original headline
Design of a low-energy-spread 12 MeV S-band thermionic electron linac based on longitudinal phase-space shaping