8” 40µm MCP Pair Photon Counting Test

Bottom MCP has corner Missing, 25 MΩ

XDL detector with pair, 0.003” spacer

Top MCP 100 MΩ in air~400MΩ in vacuum

8” 40µm MCP Pair Photon counting Tests

FIRST IMAGE - stripes due to anode/charge cloud too small –fix : have just rebuilt with 0.7mm biasable,spacer. Broken off corner on bottom MCP.

Zoom in – see multifibers

Anode – X, photon pulses

Gain ~106, <500µm resolution

8” 40µm MCP Pair Gain Map

Y gain slice

X gain slice

Y gain slice

FIRST Gain map – multifiber visible, lots of gain non-uniformity