A low energy monochromator beamline at ELETTRA: conceptual design and scientific aims

A beamline using a Low Energy Monochromator Optimized at Normal incidence (LEMON) has been designed to match the bending magnet radiation characteristics of ELETTRA, the third generation source in Trieste. The beamline will use 4×6 mrad2 of the emitted radiation cone and will be equipped with two interchangeable monochromators: one Normal Incidence Monchromator (NIM) and one Toroidal Grating Monochromator (TGM), both sharing the same focusing optics, entrance and exit slits. The expected performance of the beamline will be a photon energy range from 5 to 200 eV, a resolving power ranging from 100 000 to 500 and a photon flux up to 1×1011 ph/s/0.1BW on the sample.