Grid space coating-updates

05/01/2012

Anil Mane and Jeffrey Elam

Objective

2

Build a 8”x8” frugal tile MCPs based detector

Internal parts needed for a 8”x8” tile

Main internal parts: a) Two 8”x8” MCPsb) Two 2mm grid spacersc) One 4.45mm grid spacer

What we have for 8”x8” tile?

3

Layer Thickness (mm) R Layer(MOhm) V(V) I(μA)

grid A 2 1.7 170.0 100

MCP 1 1.2 8 800.0 100

grid B 2 2.0 200.0 100

MCP 2 1.2 10.0 1000.0 100

grid C 4.45 3.6 360.0 100

Total 10.85 25.3 2530.0 100

•Both MCP1 (8M) and MCP2 (10M) tested @ UCB and shows stable resistance

Photograph of Grid spacers:

4

GS 4.45mm GS 2mm

Note: Many thanks to Dean and his team for NiCr electrode deposition

Grid spacers I-V data:

5

•If needed we will make another set of grid spaces

Plan for demountable:

6

•Baking of all the demountable internal parts in vacuum @ 150C.

•Baking of top plate in new oven @ 100C.

•Assemble in clean room @ ALD lab (ready).

•Testing demountable at APS.

Good luck to LAPD group!!