Detector assembly, charged particle device, apparatus, and methods

The present application discloses detector assembly for a charged particle assessment apparatus, the detector assembly comprising a plurality of electrode elements, each electrode element having a major surface configured to be exposed to signal particles emitted from a sample, wherein between adjacent electrode elements is a recess that is recessed relative to the major surfaces of the electrode elements, and wherein at least one of the electrode elements is a detection element configured to detect signal particles and the recess extends laterally behind the detection element. Charged particle assessment devices and apparatus, and corresponding methods are also provided.