The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
R.L. Fleming et al., “A Simple Variable Focus Lens for Field Emitter Cathodes”, in Proc. 9th Int. Particle Accelerator Conf. (IPAC'18), Vancouver, BC, Canada, Apr. 4,, pp. 3677-3679, doi:10.18429/JACoW-IPAC2018-THPAL024