The MCES150 is a collimated and monochromatic electron source with an extremely narrow energy distribution. This type of source forms the base for a high resolution electron energy loss spectroscopy (HREELS). The combination with a Scienta Omicron high resolution ARPES analyser creates an efficient platform for vibrational spectroscopy and phonon dispersion measurements. The analyser 2D detector system enables massive parallel readout and reduces the measurement time by orders of magnitude compared to the traditional approaches.
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Integration with the ARPES Lab
The MCES150 is easily integrated with the ARPES Lab. It requires an additional flange orthogonal to the analyser port and is compatible with low temperature manipulators used in the ARPES-Lab system. It can be equipped with DA30-L, DA20, or R3000 analyser.
Specifications
< 5 meV (*)
< 3 meV at 200 pA
3 - 150 eV
0.04 x 1 mm2
54 mm
DN100CF (6" O.D.)
< 130 °C
(*) Experimental energy resolution of the MCES150 source and analyser with 3.3 meV resolution. An overall resolution of 3.9 meV is achievable [Ibach et al, Review of Scientific Instruments, 88(2017)033903].
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HREELS: Measuring Phonon Dispersion
MCES150 is a highly collimated and monochromatic electron source with an extremely narrow energy distribution. The combination of this source with Scienta Omicron high resolution ARPES analysers creates a platform for vibrational spectroscopy and phonon dispersion measurements. Using the 2D detector system of the analyser enables massive parallelisation and reduces the measurement time by orders of magnitude compared to the traditional approach.