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Note: Laser-cut molybdenum grids for a retarding field energy analyzer
K Landheer1, A A Kobelev2, A S Smirnov2
1Utrecht University, Debye Institute for Nanomaterials Science Physics of Devices, High Tech Campus 21, 5656 AE Eindhoven, The Netherlands.
The Review of Scientific Instruments
|July 3, 2017
Summary
This study introduces a novel retarding field energy analyzer (RFEA) using laser-cut molybdenum grids. These grids offer high transmission for precise energy measurements in scientific instruments.
Area of Science:
- Physics
- Materials Science
- Analytical Chemistry
Background:
- Retarding Field Energy Analyzers (RFEAs) are crucial for charged particle analysis.
- Existing RFEA grid fabrication methods can be complex and costly.
- Molybdenum is a suitable material for high-temperature and vacuum applications.
Purpose of the Study:
- To present a new method for fabricating RFEA grids using laser-cutting technology.
- To evaluate the performance of molybdenum grids in a 3-grid RFEA configuration.
- To demonstrate the high transmission capabilities of the novel grid design.
Main Methods:
- Laser-cutting a honeycomb mesh pattern into 50 μm thick molybdenum foil.
- Fabricating flat grids with a 1 cm² area.
- Testing the grids in a 3-grid RFEA with a 0.87 mm analyzer depth.
Main Results:
- Successfully created RFEA grids with a honeycomb mesh structure from molybdenum.
- Achieved high transmission grids with 20 μm wide walls and 150 μm wide meshes.
- Demonstrated the feasibility of using these grids in a functional RFEA.
Conclusions:
- Laser-cutting molybdenum foil is an effective method for producing high-transmission RFEA grids.
- The developed grids are suitable for use in 3-grid RFEA systems.
- This fabrication technique offers a promising approach for advancing RFEA technology.
