Abstract:
We propose to develop a CW X-ray femtosecond (fsec) source
at 1.2 GeV Duke storage ring with the X-ray energy tuneable
from 1.4 KeV to 75 keV, the average flux from 10 12 to 10 13
ph/sec, and the average spectral brightness up to 0.5 . 10
15 ph/sec/mm 2 /mrad 2 /0.1%BW. A novel RF system with
strong longitudinal focusing will compress and to sustain
the electron bunches circulating in the ring to a RMS
duration from 15 to 85 fsec. The CW fsec electron bunches
will generate the Compton hard-X-ray beams and the photon
beams from the existing light sources ranging form IR to
VUV. Beams of all colours will be synchronised by the e-beam
without jitter, making this configuration perfectly suites
for pump-probe experiments. The proposed approach promises
to outperform the popular slicing technique by at least
three orders of magnitude. Duke s approach can be
implemented at existing light source facilities at modest
cost.