A major advantage of the MCP/CCD and spin detection combination is that the parallel angular detection can be used to ensure that the spin-resolved measurement is performed at the desired point in k-space. In the previous analysers, this has been acheived by first recording a parallel ARPES spectrum with the MCP/CCD detector and then, without tilting the sample, recording a spin-resolved spectrum for the center of that spectrum.
With the new analyser concept deflectors have been added. This can be used to record spin-resolved spectra for all points of the recorded ARPES spectrum. Different lines can of course be combined to cover the whole plane in θx-E-space.