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Updated: Aug 29, 2025
06:58
Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization
Published on: July 12, 2016
9.6K
High-Performance Compact Pre-Lens Retarding Field Energy Analyzer for Energy Distribution Measurements of an Electron
Ha Rim Lee1, Junhyeok Hwang1,2, Takashi Ogawa1,2
1Scientific Instruments Performance Evaluation Team, Advanced Instrumentation Institute, Korea Research Institute of Standards and Science (KRISS), 267 Gajeong-ro, Yuseong-gu, Daejeon 34113, South Korea.
Summary
A novel retarding field energy analyzer (RFEA) with an integrated pre-lens improves electron gun energy distribution measurements. This compact device enhances energy resolution and signal acquisition efficiency for electron microscopy and spectroscopy.
Area of Science:
- Physics
- Materials Science
- Instrumentation
Background:
- Electron gun energy distribution is critical for electron beam instruments.
- Accurate measurement requires advanced analytical tools.
Purpose of the Study:
- To present a novel retarding field energy analyzer (RFEA) with an integrated pre-lens.
- To improve electron beam trajectory control and energy measurement accuracy.
Main Methods:
- Developed a compact RFEA with an integrated pre-lens.
- Utilized trajectory simulation theories for optimal focusing.
- Compared performance with and without the pre-lens using I-V curves.
- Characterized a Schottky electron gun under varying conditions.
Main Results:
- The integrated pre-lens significantly enhances energy resolution and signal acquisition efficiency.
- Demonstrated precise measurement of energy distribution broadening (13.8 meV for a 50 K temperature increase).
- Achieved a low relative standard deviation of 0.7% for energy distribution.
Conclusions:
- The pre-lens RFEA offers a compact and efficient solution for characterizing electron energy distributions.
- The device enables accurate performance analysis of electron guns under various operational parameters.
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