1. Jack Fowler Spain Workshop 2003 Faraday Shielding for Barrel TRT Jack Fowler Duke University Spain Workshop - 2003

2. Jack Fowler Spain Workshop 2003 Inner Cylinder Shielding Inner cylinder will be coated with copper (35 micron) clad kapton (25 micron) (Total thickness 100 microns) Due to the material width, there will be 3 separate wraps The wraps will not overlap

3. Jack Fowler Spain Workshop 2003 1 st Prototype of Cylinder Epoxy (AY 103 / HY 991) will be applied to the surface of the cylinder at an average thickness of 100 microns We have measured a total thickness of epoxy and shielding material of 250 to 300 microns

4. Jack Fowler Spain Workshop 2003 Epoxy Application

5. Jack Fowler Spain Workshop 2003 Applying Copper/Kapton

6. Jack Fowler Spain Workshop 2003 Seams between wraps 3M Copper EMI Shielding Tape 1181 will be used to cover the seams of the wraps (66 microns thick total and 35 micron copper) The tape will be spot soldered at the joint to the shield. This will be done approximately every 20 cm along the length.

7. Jack Fowler Spain Workshop 2003 Cylinder with Shield

8. Jack Fowler Spain Workshop 2003 Inner Cylinder Summary Kapton coated copper will be epoxied onto the cylinder The seams will be covered using copper tape. These joints will also be soldered. Maximum thickness should not exceed 350 to 400 microns. We have 1 mm.

9. Jack Fowler Spain Workshop 2003 Space Frame Shielding The complete outer surface of the space frame will be covered with 3M Embossed Copper Foil Shielding Tape 1245 without tin plating (shown is tin plated) 100 microns thick / 35 micron Cu The cooling tube corners will not be covered

10. Jack Fowler Spain Workshop 2003 Tape coverage ~18 mm of the space frame in Z will be covered. The edge of the tape and frame will be coated with epoxy (AY103 /HY991) to prevent peeling

11. Jack Fowler Spain Workshop 2003 Soldered Joints All of the intersection points of the tape pieces will be spot soldered to ensure a long term electrical connection

12. Jack Fowler Spain Workshop 2003 Joining the Inner Cylinder to Space Frame The cylinder shielding will be applied within 0.5 mm of the area the space frame will occupy. Soldered connection will be made for each 1/32

13. Jack Fowler Spain Workshop 2003 Space Frame Summary Embossed Bare Copper tape will be used to shield the space frame The inner cylinder will be connected to the space frames by soldered connections.

14. Jack Fowler Spain Workshop 2003 Outer Cylinders The outer cylinder will be covered with the same copper/kapton material on the outer surface. The connection to the will most likely be made using tape around the outer corner.