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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