Electric Field Dependence on Charge Collection of CdZnTe X-Ray Detectors
G C Giakos1, B Pillai, S Vedantham
1Department of Biomedical Engineering, University of Akron, Akron, Ohio 44325.
Journal of X-Ray Science and Technology
|February 11, 2011
Summary
Increasing bias voltage improves charge collection in cadmium zinc telluride (CdZnTe) detectors, enhancing contrast for digital radiography. This ensures efficient operation and high spatial resolution for diagnostic imaging.
Area of Science:
- Materials Science
- Medical Physics
- Detector Physics
Background:
- CdZnTe detectors are crucial for X-ray imaging.
- Understanding charge collection efficiency is key for performance.
Purpose of the Study:
- Investigate electric field effects on CdZnTe detector charge collection.
- Determine detector contrast under varying X-ray and bias conditions.
Main Methods:
- Experimental analysis of CdZnTe detectors.
- Varying X-ray tube settings and applied bias voltages.
- Measuring detector contrast and charge collection efficiency.
Main Results:
- Higher bias voltage leads to more efficient charge collection.
- Complete charge collection and saturation are achieved at sufficient voltages.
- Detector contrast significantly improves with increased bias voltage.
Conclusions:
- Optimized bias voltage is essential for CdZnTe detector performance.
- CdZnTe detectors demonstrate potential for advanced digital radiography.
- Efficient charge collection directly correlates with enhanced contrast and resolution.
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