Full text loading...
Principle of pulsed infrared light AFM detection.
Oscilloscope trace of the cantilever oscillation triggered with an FEL wavelength of 20 μm with (right) and without (left) a graphite layer (the 2 cantilevers have different resonnant frequencies).
Comparison between the power meter and cantilever signals. Between 43 and 50 μm the power meter sensitive drops below its threshold level. This effect is due to a particular effect occurring in FELs using partial waveguiding (see Ref. 4).
Beam profile at 37 μm using the cantilever. RMS size is approximately 2 mm, for the focusing used here (f = 1 m)
Spectrum of the FEL at different wavelength. Holes at 62, 62.5, 63, and 63.5 μm on the spectra come from air absorption despite partial water purging.
Article metrics loading...