1. DC56 Bi-weekly Meeting: DC5 Modifications September 3, 2013 Robert Heitz University of Illinois

2. 64 More Channels per Layer Grey PCBs are not modified Red PCBs are modified on the edges Gold PCBs are new Color Coding G-10 -> Green PCBs -> Grey, Red, Gold

3. BeforeAfter PCB Modified Edges Straight Edge Slanted Edge Originally end PCBs had straight edges. Additional PCB require previous end boards to have a slant connection.

4. PCB Modified Edges Slanted Edge

5. Side View of Modified DC5 UU’ VV’ Modified Side

6. Copper Shielding Modifications Additional PCBs extend out past G-10 and require shielding to be modified. New PCBs and read out electronics require additional cuts on copper shielding.

7. Additional Soldering Cuts Soldering cuts must extend around G-10 frames. Original Soldering cuts More soldering cuts must be made here to account for new PCBs

8. Soldering Cuts Using the same soldering cuts as DC4 causes high voltage cuts to be through holes. This means high voltage cuts must be shallower. Gas cuts must also be modified in this region. Soldering Cut Beam killer cuts must not be as deep.