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The entire vertex detector is enclosed within a double walled carbon fiber support tube. The support tube walls are 0.05cm thick carbon fiber with inner radii of 16.87cm and 18.42cm and a |z| extant of |z|<89.48cm. The ends of the support tube double-walled disks of 0.05cm thick carbon fiber disks that span 5.5cm<r<16.87cm and are located at |z|=97.5cm and |z|=99.74cm.disks located as follows:
Wall | Inner Radius | Outer Radius | Inner |z| |
|---|---|---|---|
Inner | 4.80cm | 16.87cm | 86.88cm |
Outer | 4.91cm | 16.87cm | 89.43cm |
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