Author/Authors :
Chung، نويسنده , , S.-C. and Chen، نويسنده , , J. and Huang، نويسنده , , L.-R. and Wu، نويسنده , , R.T and Chen، نويسنده , , C.-C. and Cheng، نويسنده , , N.-F. and Chuang، نويسنده , , J.M. and Tseng، نويسنده , , P.-C. and Huang، نويسنده , , D.J. and Chang، نويسنده , , C.F. and Perng، نويسنده , , S.-Y. and Chen، نويسنده , , C.T. and Tsang، نويسنده , , K.-L.، نويسنده ,
Abstract :
A high performance wide range elliptically polarized undulator beamline is under commissioning at SRRC. The dragon-type design with two independent entrance slits has been employed to cover photon energies from 60 to 1400 eV. The energy resolution of the beamline has been measured using Ar, N2, and Ne absorption spectra. The photon flux as a function of energy has been recorded by photodiode and gives an average of flux greater than 1×1012 photons/s/200 mA with both slits set at 10 μm. Based on spin polarized photoemission and magnetic circular dichroism results, the degree of polarization calculated from the spin-polarized resolved spectrum is estimated to be better than 95% in the first harmonic undulator radiation.
Keywords :
Dragon beamline , Circular polarization , spin polarization , MCD
