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Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
Published on: May 10, 2021
Self-scanned anode array with a microchannel plate electron multiplier: the SSANACON
Applied Optics
|February 20, 2010
Summary
This study introduces a novel photoelectron counting detector for space spectroscopy. It features a 128-element anode array and microchannel plates, enabling low-noise, high-dynamic-range measurements of faint cosmic signals.
Area of Science:
- Space instrumentation
- Detector physics
- Ultraviolet spectroscopy
Background:
- Development of advanced detectors is crucial for space missions.
- Microchannel plates (MCPs) are essential for sensitive signal detection.
- Previous anode array technologies informed new detector designs.
Purpose of the Study:
- To develop a unique photoelectron counting detector for the Mariner Jupiter/Saturn Ultraviolet Spectrometer.
- To achieve low noise and a large dynamic range for spectral measurements.
- To enable simultaneous measurement of signals with vastly different intensities.
Main Methods:
- Utilized a 128-element linear self-scanned anode array coupled with a dual microchannel plate (MCP) electron multiplier.
- Employed proximity focusing and a rectangular MCP active area.
- Investigated microchannel plate gain degradation concerning extracted charge.
Main Results:
- Achieved a dark count rate of approximately 3 x 10(-3) (anode-sec)(-1).
- Demonstrated simultaneous measurement of signals differing by over six orders of magnitude.
- Spatial resolution allowed spectral line determination to a fraction of an anode width.
Conclusions:
- The developed detector offers superior performance for space-based ultraviolet spectroscopy.
- The design successfully integrates advanced anode array and MCP technologies.
- Understanding MCP gain degradation is vital for long-term detector stability.
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