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Sensors are mounted on 13.5cm long support cylinders made of 0.0065cm thick carbon fiber (25% coverage of 0.026cm thick CF).
The cylinders attach to 0to 0.0065cm thick carbon fiber bulkheads that span 1.45cm<r<6.04cm located at |z|=6.75 cm.
The vertex detector supports are 0.0427cm thick carbon fiber cylinders that span 1.45cm<r<16.953cm located at |z|=6.78cm.
Readout electronics and the and the radial cabling are modeled as disks as disks at the ends of the sensors.
At the ends of each sensor layer are G10 are G10 rings with a radial thickness of 0.2cm and a thickness a thickness in z of 0.498cm.
The rings have an inner |z| position of 6.25cm and the inner radii are the same as the sensors.
Radial cables are modeled as Cu disks with an inner |z| of 6.90cm and radial spans and thicknesses given by the following table:
Inner radius | Outer radius | Thickness |
|---|---|---|
1.32cm | 2.26cm | 0.0057cm |
2.26cm | 3.54cm | 0.0031cm |
3.54cm | 4.80cm | 0.0016cm |
4.80cm | 6.04cm | 0.0007cm |
There are four forward disks on either end, composed of a total of .0113cm of silicon, of which the inner .002cm is sensitive.
All of the disks extend to a maximum radius of 7.5cm.
The innner |z| positions and inner radii for the four disks are:
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The forward disks are supported by 0.0065cm thick carbon fiber (25% coverage of 0.026cm thick CF) that are located 0.02cm behind the inner face of the disks sensors and extend from the inner disk radius to an outer radius of 16.953cm.
Forward disk readout electronics and cables are modeled as having an inner and outer part.
The inner part consists of G10 rings of 0.1cm thickness in radius and 0.2mm thickness in z that are located radially just inside the sensors and begin 0.1cm in front of the inner sensor plane.
The outer part consists of G10 rings of 0.5cm thickness in radius and 0.2mm thickness that are located radially just outside the sensors and begin 0.2cm in front of the inner sensor plane.
Cables and services are in 3 parts.
The inner cables are 0.012cm thick and run conically from an inner radius of 1.32cm at |z|=6.9cm to 1.455cm at |z|=10.0cm.
Service material of thickness 0.3cm runs conically from an inner radius of 1.455cm at |z|=10cm to 1.542cm at |z|=12cm.
The outer cables are parallel to the conical beam pipe and flare from a thickness of 0.010cm at an inner radius of 1.542cm at |z|=12cm to a thickness of 0.004cm at |z|=167.9cm.
The entire vertex detector is enclosed within a 200cm long double walled carbon fiber support tube.
The support tube support tube walls have inner radii of 16.954cm and 18.434cm and are 0.0427cm thick.
The ends of the support tube double-walled disks of 0.0427cm thick carbon fiber disks that span 5.5cm<r<16.953cm and are located at |z|=97.5cm and |z|=99.74cm.
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