A 6 degree bias angle, low noise Galileo Electro-Optics Corporation MCP ( Ser. No. PAL-1) was coated with KBr and CsI.

1st coating: KBr (fiducial: II(2)) 16.66 +/-0.48 kAngstrom
2nd coating: CsI (fiducial: I(1)) 14.84 +/-0.24 kAngstrom

Coated MCP mounted in holder. The coatings were applied in 120 degree segments. The CsI coating is centered about the 'I" fiducial at 10 O'Clock; the KBr coating centered about the "II" fiducial at 2 O'Clock. The third segment is uncoated. The pores are aligned with the common boundary between the two coatings (the line joining 6 O'Clock and 12 O'Clock).

Image of coating mask and coated MCP.