  Imaging spectroscopy is intended to be coupled with adaptive optics (AO) on
large solar telescopes, in order to produce high spatial and temporal
resolution measurements of velocities and magnetic fields on a 2D target. We
present the theoretical capabilities of a new generation 24-channel MSDP slicer
for 8-meter class spectrographs which are common in solar astronomy. The aim is
to produce 24-channel spectra-images providing cubes of instantaneous data (x,
y, $\lambda$) allowing the study of the plasma dynamics and magnetic fields. We
investigate the possibility of doubling the spectral resolution using two
interlaced spectra-images, delivering together 48 channels. Two polarimetric
methods are also explored providing simultaneous measurements of Stokes
combinations with a dual beam; one of them could provide 48 sub-channels (or 96
with wavelength interlaced observations).
