TY - CPAPER
AU - Garcia, B.W.
AU - Dunning, M.P.
AU - Hast, C.
AU - Hemsing, E.
AU - Raubenheimer, T.O.
AU - Xiang, D.
TI - Facility Upgrades for the High Harmonic Echo Program at SLAC's NLCTA
J2 - Proc. of FEL2015
AB - The Echo program currently underway at SLAC's NLCTA test accelerator aims to use Echo-Enabled Harmonic Generation (EEHG) to produce considerable bunching in the electron beam at high harmonics of a 2.4um seed laser. The production of such high harmonics in the EUV wavelength range necessitates an efficient radiator and associated light diagnostics to accurately characterize and tune the echo effect. We have installed and commissioned the Visible to Infrared SASE Amplifier (VISA) undulator, a strong focusing two meter long planar undulator of Halbach array design with 1.8cm period length. To characterize the output radiation, we have designed, built, and calibrated a grazing incidence EUV spectrometer which operates between 12-120nm with resolution sufficient to resolve individual harmonics. An absolute wavelength calibration is achieved by using both EEHG and High Gain Harmonic Generation (HGHG) signals from the undulator.
PB - JACoW
CY - Geneva, Switzerland
SP - 422
EP - 426
KW - laser
KW - undulator
KW - radiation
KW - electron
KW - focusing
DA - 2015/12
PY - 2015
SN - 978-3-95450-134-2
DO - 10.18429/JACoW-FEL2015-TUP027
UR - http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/tup027.pdf
ER -