Chevron MCP
Most modern MCP detectors consist of two microchannel plates with angled channels rotated 90° from each other producing a chevron (v-like) shape. The angle between the channels reduces ion feedback in the device. In a chevron MCP the electrons that exit the first plate start the cascade in the next plate. The advantage of the chevron MCP over the straight channel MCP is significantly more gain at a given voltage. The two MCPs can either be pressed together or have a small gap between them to spread the charge across multiple channels.
Read more about this topic: Microchannel Plate Detector