The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
S.M. Lynam, R.B. Agustsson, I.I. Gadjev, F.H. O'Shea, and A.Yu. Smirnov, “Fabrication Progress of a Superconducting Helical Undulator with Superimposed Focusing Gradient for High Efficiency Tapered X-Ray FELs”, in Proc. NAPAC'19, Lansing, MI, USA, Sep. 2019, pp. 509-511. doi:10.18429/JACoW-NAPAC2019-TUPLH10