1. 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

2. 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.

3. 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

4. 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

5. 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