SSL-UCB, ALD MCP Test Progress The sensitivity of the activated photocathode is considerably higher, with a quantum efficiency of as high as 37% at about 450 Å and a sensitivity cut off energy of about 6.2 eV. The observed decrease of sensitivity at 988 and 520 Å (and probably not observed at ~670 Å) is likely to correspond to 2xEgap+Eaff,, 4xEgap+Eaff,, and 3xEgap+Eaff,, respectively. A much better spectral continuity of the illumination source is required in order to study the UV absorption fine structure. Sent two MCPs for Al2O3 ALD coating of half surface Both MCPs standard glass MCPs ~ 90Meg Ω

SSL-UCB, ALD MCP Test Progress The sensitivity of the activated photocathode is considerably higher, with a quantum efficiency of as high as 37% at about 450 Å and a sensitivity cut off energy of about 6.2 eV. The observed decrease of sensitivity at 988 and 520 Å (and probably not observed at ~670 Å) is likely to correspond to 2xEgap+Eaff,, 4xEgap+Eaff,, and 3xEgap+Eaff,, respectively. A much better spectral continuity of the illumination source is required in order to study the UV absorption fine structure. The two MCP assemblies were tightened differently, the 12nm sample (left) shows a shadow where the MCP was clamped in, the 6nm (right) sample shows no deposits at all. The 12nm MCP was a bit loose, and the 6nm was tight.

SSL-UCB, ALD MCP Test Progress ML201-B-2 12nm ALD shows some debris and smudging that was removed in cleaning Before cleaning The sensitivity of the activated photocathode is considerably higher, with a quantum efficiency of as high as 37% at about 450 Å and a sensitivity cut off energy of about 6.2 eV. The observed decrease of sensitivity at 988 and 520 Å (and probably not observed at ~670 Å) is likely to correspond to 2xEgap+Eaff,, 4xEgap+Eaff,, and 3xEgap+Eaff,, respectively. A much better spectral continuity of the illumination source is required in order to study the UV absorption fine structure. After cleaning

SSL-UCB, ALD MCP Test Progress ML201-B-1 6nm ALD shows less debris and smudging, - was removed in cleaning Before cleaning The sensitivity of the activated photocathode is considerably higher, with a quantum efficiency of as high as 37% at about 450 Å and a sensitivity cut off energy of about 6.2 eV. The observed decrease of sensitivity at 988 and 520 Å (and probably not observed at ~670 Å) is likely to correspond to 2xEgap+Eaff,, 4xEgap+Eaff,, and 3xEgap+Eaff,, respectively. A much better spectral continuity of the illumination source is required in order to study the UV absorption fine structure. After cleaning

Initial Imaging Results on Standard MCPs with 6nm ALD coating Shows definite enhancement of brightness in ALD area No degradation of image quality, except at the boundary zone for coating 1150v MCP, 2800v Screen, UV flood Photonis ML201-B-1 MCP, 86MΩ 1050v MCP, 2900v Screen, UV flood Photonis ML201-B-1 MCP, 86MΩ