Collaboration Meeting Argonne National Laboratory June 10-11, 2010

Mechanical Design of

Glass Tiles and Trays

Rich Northrop University of Chicago

Second Large Area Fast Photo-Detectors Collaboration Meeting

6.10.10

Inside-Out Glass Tile with Bottom Anode Exploded View

Signal is Differential on Traces – the ‘Ground’ is inside Vacuum

High Voltage Distribution on Inside of Window

The High Voltage is transmitted to the Photocathode and the four MCP Electrode surfaces by the metalized pattern

On the Bottom surface of the Tile Window

Top Anode Pattern on inside surface of Tile base - Version 1 Top Anode Pattern - Version 2

Smaller Strip inter-connect gives better RF characteristics

Anode Strips

2 x 3 Super-Module Tray and Tile Design

Super Module Concept Sketch and Full Scale Assembly

Recent Stress Analysis

New suggestion to change from a 5 x 5 spacer pattern to a 4 x 4 spacer pattern might be an improvement

Fabricated per unit cost estimates

30 1000 3000 10,000 100,000

Window (1@) $82 20 15 12 10

Side wall (1@) $35 30 25 22 20

Base plate (1@) $20 13 11 10 8

Rod Spacers (75@) $2 1.50 1 1 1

Total $287 $175.50 $126 $119 $113

The above prices are for water jet cut B33 glass, tol. +- 0.010, except rod spacers +000 -0.004

---------Quotations--------- -----------------------Cost estimates----------------------

Inside-Out Mechanical Component Costs

w/ Anode Pattern

w/ No-Hands HV pattern, No PC

Fabricated per unit cost estimates

30 1000 3000 10,000 100,000

FR4 PCB 27 x 8.66 $44 21 20 20 19

Glass Epoxy

Honeycomb Panel $45 40 39 38 37

---------Quotations--------- -----------------------Cost estimates----------------------

Super-Module Component Costs

Open Design Issues

1. Spacer tolerances

2. Getter Placement and Attachment

3. Cabling and Strain Relief

4. Mounting

5. ?