MCP:Bias Angle
The bias angle is a crucial geometric parameter that significantly affects the performance of Micro-Channel Plate (MCP) Photon Detectors by optimizing detection efficiency, sensitivity to incident particles, and performance in stacked configurations and magnetic fields.
Influence on Detection and Resolution The bias angle, defined as the angle between the channel axis and the axis perpendicular to the plate surface, is varied to optimize the strike angle for secondary electron creation. It is typically selected between 5° and 15° in consideration of the relative sensitivity to the incident angle and resolution.
Particle and Energy Specificity Varying the bias angle is used to optimize the angular dependency of UV and soft X-ray detection. Specific angles are often chosen for different particle types:
- Collimation and filtration primarily select 0° bias angles.
- Photons are optimized at 5°.
- High resolution analog detection applications are also optimal at 5°.
- Electrons are optimized at 8°.
- Ions are optimized at 12°.