Table 1. Contributions to the energy resolution of the high-resolution spectrometer using a 50 µm-thick PMMA sample.

The different contributions are defined by Huotari et al. (2005 ▸) and Moretti Sala et al. (2018 ▸).

Contribution	ΔE (meV)
Analyser Darwin width	14
Source size	8
Pixel size	10
Johann aberration	5
Spectrometer	20
Incident bandwidth	11
Total	22