TY - CPAPER AU - Campbell, L.T. AU - Maier, A.R. TI - Dispersion of Correlated Energy Spread Electron Beams in the Free Electron Laser J2 - Proc. of FEL2015 AB - The effect of a correlated linear energy chirp in the electron beam in the FEL, and how to compensate for its effects by using an appropriate linear taper of the undulator magnetic field have previously been investigated considering relatively small chirps. In the following, it is shown that larger linear energy chirps, such as those found in beams produced by laser-plasma accelerators, exhibit dispersive effects in the undulator, and require a non-linear taper on the undulator field to properly optimise. PB - JACoW CY - Geneva, Switzerland SP - 718 EP - 721 KW - electron KW - undulator KW - FEL KW - radiation KW - plasma DA - 2015/12 PY - 2015 SN - 978-3-95450-134-2 DO - 10.18429/JACoW-FEL2015-WEP073 UR - http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/wep073.pdf ER -