1. ANSYS Calculations: DC Distortions Sense Wires with Varying Tension Shortest wire (m)0.3 Longest wire (m)4 Difference between short and long wires3.7 Division Average wire location along end plate Average Length per Division % of full wire tension Wire sag (microns) Sense wire tension (g) Operating stress (Mpa) % of Yield Strength Stretch (mm) 10.070.5620013.640555.1335.780.78 20.211.0916761.033.4463.5429.881.27 30.361.62133168.526.6369.1623.801.50 40.502.15100394.120277.5717.891.49 50.642.68133460.026.6369.1623.802.47 60.793.21167525.233.4463.5429.883.72 70.933.74200595.040555.1335.785.18

2. Region 1 Distortions Summary Division (1 at nose, 7 at backplate) Total wire tension (lb) Total wire tension (N) Wire Sag (horizontal wire) (micron) End Plate Deflection due to wire load (micron) Wire end displacement (microns up from nose) 1192.685933014 2160.871712368171 3128.1571331074498 496.3429781463678 5128.1571921217564 6160.8717105435202 7192.68591193516 1059.44723.9

3. Region 2 Distortions Summary Division (1 at nose, 7 at backplate) Total wire tension (lb) Total wire tension (N) Wire Sag (micron) End Plate Deflection due to wire load (micron) Wire end displacement (microns up from nose) 1192.6859613663 2160.871729919426 3128.1571841344623 496.34292011252580 5128.1571238780362 6160.871727420394 7192.68593127434 1059.44723.9

4. Region 3 Distortions Summary Division (1 at nose, 7 at backplate) Total wire tension (lb) Total wire tension (N) Wire Sag (micron) End Plate Deflection due to wire load (with posts) (micron) Wire end displacement (microns up from nose) 1192.68591400 2160.871761209 3128.15711694019 496.34293945023 5128.15714604019 6160.8717525209 7192.685959500 1059.44723.9

5. “Pre-bow” or “build-flat” ? - how large are the corrections? “Pre-bow”“Build-flat” Endplate deflection Reg 1,2,3: 680, 620, 25  m Reg 1,2,3: ~ +/-250  m Maximum wire sag 1 Reg 1,2,3: 120, 310, 595  m Middle wire sag Reg 1,2,3: 80, 200, 400  m Middle wire total 2 Reg 1,2,3: 690, 650, 400  m Reg 1,2,3: 260, 320, 470  m 1.“wire sag” is for a horizontal wire; ~ half that for top/bottom sectors ~ zero for sectors 1 & 4 2.“wire total” is the quadratic sum of endplate deflection and wire sag

6. “Pre-bow” or “build-flat” ? “Pre-bow”“Build-flat” Pro smaller deflection  smaller correction to wire position simpler, more accurate, construction simpler final shape Con harder to model shape must still do wire-sag correction less accurate layup (chamber to chamber) larger correction to wire position (in general, a larger correction gives a larger systematic error)

7. “Pre-bow” or “Build flat” ? “Build-flat”  more accurate chamber to chamber “Build-flat”  larger corrections but simpler to model from survey data  simpler to correct in software In either case, we must do software corrections for chamber distortions