A high-sensitivity angle and energy dipersive multichannel electron momentum spectrometer with 2π angle range

Area of Science:

• Atomic and Molecular Physics
• Electron Spectroscopy
• Quantum Chemistry

Background:

• Electron momentum spectroscopy is crucial for understanding electron dynamics in atoms and molecules.
• Existing spectrometers often have limitations in angular coverage and sensitivity.

Purpose of the Study:

• To present a novel high-sensitivity angle and energy dispersive multichannel electron momentum spectrometer.
• To demonstrate its capability for simultaneous detection over a wide angular range.

Main Methods:

• Development of a new double half wedge and strip anode position-sensitive detector.
• Integration with a 90° sector, 2π spherical electrostatic analyzer.
• Simultaneous electron detection over a 2π angle range and ~150° azimuthal angle range.

Main Results:

• The spectrometer achieves high sensitivity for electron momentum distribution measurements.
• Demonstrated performance in experimental studies using argon targets.
• Simultaneous data acquisition over a broad angular range.

Conclusions:

• The developed spectrometer is a powerful tool for advanced electron momentum spectroscopy.
• It enables detailed investigations of electron dynamics with enhanced angular resolution.
• The instrument shows significant potential for future atomic and molecular collision studies.