Extreme ultraviolet spectrometer based on a transmission electron microscopy grid
We performed extreme ultraviolet spectroscopy using an 80 lines/mm transmission electron microscope mesh as the dispersive element. We present the usefulness of this instrument for dispersing a high harmonic spectrum from the 13th to the 29th harmonic of a Ti:sapph laser, corresponding to a wavelength range from 60 to 27 nm. The resolution of the instrument is limited by the image size of the high harmonic generation region on the detector. The resolution in first order diffraction is under 2 nm over the entire spectral range with a resolving power around 30.