Prospects of measuring a metallicity trend and spread in globular clusters from low-resolution spectroscopy

Context. The metallicity spread, or the trend along evolutionary sequence of a globular cluster, is rich source information to help understand cluster physics (e.g., multiple populations) and stellar atomic diffusion). Low-resolution integral-field-unit spectroscopy in optical with MUSE spectrograph an attractive prospect if it can provide these diagnostics because allows us efficiently extract spectra large fraction stars only few telescope pointings.