Discussion of structural simulations of the foil frame option for the MI52 ESS
02/02/2017
present: M.Alvarez, M. Pham, V. Nagaslaev
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Present MI52 geometry with wires:
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10wires/inch
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L=144"=3.65m (in Mike Backfish calc-sheet it is 3.05m)
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E-force used was 0.02N/wire (in our calculations 0.05N/foil - quite a discrepancy! need to x-check!)
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horizontal rail deflection with E=0 Xu=0.006", Xd=0.005"; 0.001" more when E-field is on. This is consistent with Dave's old calculations and measurements
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Modified frame for the foils
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10 foils/inch
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Tension=2.2lbs/foil
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horizontal rail deflection with E=0 Xu=0.0065", Xd=0.0055";
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Vertical deflection Yu=0.029", Yd=0.027". When tension is turned off, Yu=0.029", Yd=0.029". Effect of tension is very small. Effect of E-field is very small. Rail deflection is largely due to the gravitation.
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It appears that modified frame with foils will be adequate for use in MI52 septa.
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Matt now needs to proceed with the cost spreadsheet.
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