1. Electrostatic FEA on Field Cage Profile Configurations Bo Yu

2. Outer Edges Aligned 2 180kV on CPA, 3kV between profiles, 50mm CPA tube, 20cm ground plane clearance at top and 30cm on left. Ground: 20cm Ground: 30cm

3. Small Field Cage Test 3 80kV on electrodes, 6.6cm profile to ground clearance

4. Top Edges Aligned, Left CPA Edge Offset 4cm 4 Shift the CPA edge to one side by 4cm such that the inner edge of the field cage matches the inner edge of the CPA tube. The ground plane on this side is 26cm away from the outer edge of the CPA. The other ground plane is still 20cm away from the CPA/FCA. CPA at -180000V. Ground: 20cm Ground: 26cm

5. CPA Up 2cm, Left CPA Edge Offset 4cm 5 Keep the 4cm offset on the CPA left edge, move the CPA up by 2cm. The ground plane on left side is 26cm away from the outer edge of the CPA. The top ground plane is 18cm away from the CPA top edge. CPA at -180000V. Ground: 18cm Ground: 26cm Peak E field ~28kV/cm on the CPA corner.

6. Summary 6 Ground: 18cm Ground: 26cm Ground: 20cm Ground: 26cm Ground: 20cm Ground: 30cm E cap ~ 25kV/cm E cpa ~ 18kV/cm E cap ~ 21kV/cm E cpa ~ 25kV/cm E cap ~ 20kV/cm E cpa ~ 28kV/cm