From: Arthur W. Brooks
Sent: Friday, February 16, 2007 10:27 AM
To: Wayne T. Reiersen; Steve Raftopoulos; James H. Chrzanowski; Phil
Heitzenroeder; Robert A. Ellis; Thomas G. Brown; Hutch Neilson; Michael
C. Zarnstorff; Lawrence E. Dudek
Subject: Modular Coil Gravity Deflections

Attachments: Coil Gravity Displacements.xls

Folks,

Attached are some analytic results of the expected deflections for the Modular Coils under several assumed support conditions including:

Vertical, resting on base legs/feet
Horizontal, fully supported on flange face
Horizontal, four points (where each let meets the flange)
Horizontal, three points/locations only - Inboard Midplane and Outboard above and below port opening

The data gives the maximum value of each component of deflection plus the max net deflection (not the components at the maximum net deflection). Also the model includes the winding which adds weight but also some stiffness.

If we can assure the coils are fully supported along the face of the flange when horizontal the expected displacements are less the 0.001" for all coils. More likely we will wind up with a three or four point support where the deflections can approach 0.010". 

In the vertical the deflections are comparable although the B coils shows deflections as high as .016" only because it has legs only on one side causing it to lean in the analysis. In reality we would try to use some lateral constraint to minimize this.

In general, the C coils are the stiffest, deflecting the least with the B closely follows the A in deflecting the most.

Not included here are any additional deflections which may be imposed by forces from any real world constraint system trying to "close the gaps".

Art