Abstract:
In this paper we present the result of the deep-UV lasing
with the OK-4/Duke storage ring FEL. The OK-4 FEL
was initially commissioned in the near-UV at Duke Free
Electron Laboratory in November, 1996 followed by a
year-long shutdown. After re-establishing the storage ring
operation in early 1998, the OK-4 FEL lasing was
demonstrated in the wavelength range of 217 to 256 nm in
1998. A number of lasing modes with electron energies
ranging from 300 to 750 MeV have been established to
accommodate application research. Starting September,
1998, the coherent deep-UV radiation is used for
applications in cornea surgery, cell biology, surface
physics, and nuclear physics. In this paper we report the
results of the deep-UV lasing with the OK-4/Duke storage
ring FEL as well as our plans to advance towards the
VUV.
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