Deitrick, K.E. Delayen, J.R. Krafft, G.A. Terzić, B. JACoW Publishing Geneva, Switzerland 2226-0366 978-3-95450-194-6 10.18429/JACoW-LINAC2018-MO2A04 English 19-23 MO2A04 electron laser brilliance emittance gun Contribution to a conference proceedings 2019 2019-01 https://doi.org/10.18429/JACoW-LINAC2018-MO2A04 http://jacow.org/linac2018/papers/mo2a04.pdf New designs for compact SRF linacs can produce micron-size electron beams. These can can be used for inverse Compton scattering light sources of exceptional flux and brilliance.