Microchannel plate fabrication using glass capillary arrays with Atomic Layer Deposition films for resistance and gain
Citation
Popecki, M. A., et al. (2016), Microchannel plate fabrication using glass capillary arrays with Atomic Layer Deposition films for resistance and gain, J. Geophys. Res. Space Physics, 121, 7449–7460, doi:10.1002/2016JA022580.
Keywords
- Atomic Layer Deposition (ALD)
- microchannel plates (MCPs)
- glass capillary arrays
- secondary electron emission (SEE)
- gain
- resistance
- lifetime
- spatial uniformity
- curved MCPs
- temperature dependence
Brief
Atomic Layer Deposition (ALD) Microchannel Plates (MCPs), which combine glass capillary array substrates with ALD films, offer several advantages over conventional MCPs for use in space instrumentation.
Summary
This article discusses the fabrication of microchannel plates (MCPs), which are used in a variety of applications like image intensification and UV detection. Atomic Layer Deposition (ALD) is a new method for fabricating MCPs using glass capillary arrays.
Here are some key advantages of ALD-fabricated MCPs over conventionally-fabricated MCPs:
- ALD MCPs allow the manufacturer to independently choose the glass, resistance, and emissive properties of the MCP.
- ALD MCPs can be easily made in curved or nonplanar shapes.
- The borosilicate glass used in ALD MCPs have low levels of radioactive material, which results in a lower background rate.
- The glass substrates used in ALD MCPs can be engineered to provide enhanced robustness.
- ALD MCPs exhibit sustained high gain over their lifetime.
- ALD MCPs have demonstrated a total extracted charge of 7 C/cm2.
This article also discusses the current state of the art of both ALD and conventional MCPs with regard to properties such as channel diameter, background counting, secondary electron yield, gain, and extracted charge.
Origin: https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2016JA022580