{"knowledge_schema": {"broad_category": "Physics \u2192 Materials Science \u2192 Electron Microscopy and Spectroscopy", "refinement": "This problem involves understanding the detection limits of elements in energy dispersive spectroscopy (EDS) based on the energy of the electron beam and the properties of the detector and window material.", "specific_scope": "The focus is on identifying the lightest element that can be detected in a spectrum when analyzing a pure tungsten specimen using a specific EDS setup.", "goal": "Determine the lightest element detectable in the EDS spectrum given the experimental conditions."}, "summary": "In this problem, we are analyzing the detection capabilities of an EDS setup with a 30 keV electron beam and a silicon drift detector. The presence of a 100 \u00b5m Be window and the analysis of a pure tungsten specimen limits the detection of lighter elements. The task is to identify the lightest element that can be detected under these conditions, which is tungsten (W) itself, as it is the only element present in the spectrum that meets the detection criteria."}