The Collection Efficiency of a Large Area PMT Based on the Coated MCPs

The electron collection efficiency (CE) of the photomultiplier tube based on microchannel plates (MCP-PMT) is limited by the MCP open area fraction. Coating MCP with a high secondary yield material is supposed to be an effective approach to improve CE. Both typical and coated MCP-PMTs are developed. A relative measurement method is proposed to characterize the collection efficiency performance. Results show that the PMT based on the coated MCPs has a significant improvement on CE, a good gain uniformity and a high precise energy resolution.

Automated summary

This article investigates the electron collection efficiency of a photomultiplier tube based on microchannel plates (MCP-PMT) and proposes a method to improve it by coating the MCP with a high secondary yield material. The performance of both coated and uncoated MCP-PMTs is compared using a relative measurement method. The results show that the PMT based on the coated MCPs has a significant improvement in electron collection efficiency, gain uniformity, and energy resolution.