INTERACTION OF INTENSE ULTRASHORT XUV PULSES WITH DIFFERENT SOLIDS - RESULTS FROM THE TESLA TEST FACILITY FEL PHASE I

Key results of a study of irreversible changes induced at surfaces of metals, semiconductors, and insulators by ultrashort XUV pulses generated at the TTF FEL facility are reported and discussed. Energy spectra of ions ejected from the irradiated surfaces are also reported. Special attention is paid to a difference in the ablation behavior of (semi)conductors and insulators that we have observed. The difference is dramatic while the absorption coefficients are similar for all materials at the TTF1 FEL wavelength.