
The TESLA Test Facility (TTF) at
DESY
The TTF-FEL has shown first lasing
It is a pleasure to inform you that last night the shift crew succeeded to
observe first lasing of the TTF FEL. The observed wave length is 109 nm. The
increase in intensity compared to the spontaneous radiation is more than 2
orders of magnitude. The width of the radiation cone is
300 microradian as compared to 3 milliradian for the spontaneous radiation.
The intensity of the radiation shows a strong dependency on the bunch
charge. All observations are in agreement with what is expected for SASE.
We are looking forward to the coming experimental programme.
22.02.2000
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