Source: wikibot/hemispherical-electron-energy-analyzer

= Hemispherical electron energy analyzer
{wiki=Hemispherical_electron_energy_analyzer}

A Hemispherical Electron Energy Analyzer (HEEA) is an analytical instrument used in surface science and materials characterization to analyze the energy distribution of electrons emitted from a sample. It is particularly useful in techniques like photoelectron spectroscopy (PES) and Auger electron spectroscopy (AES). \#\#\# Key Features of Hemispherical Electron Energy Analyzers: 1. **Design**: The analyzer typically consists of two hemispherical electrodes that create an electric field.