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The barrel cryostat is a cylinder of 1.5cm PolystyreneFoam with inner radius 11.2cm and z extent +/- 24.0cm.
The endplate cryostats are disks of 3.0cm PolystyreneFoam with inner radius 2.3cm, outer radius 11.2cm and inner z of 21.0cm.
The cryostat coatings and Faraday cage are represented by 0.02cm Aluminum placed at the inner surfaces of the cryostat.
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| title | DRAFT |
|---|---|
| borderStyle | solid |
Tracker:
For a more detailed description of the tracker material, please see the attached document.
This section is still being updated to reflect changes in the tracker descriptions.
Tracker:
The tracker is composed of five cylindrical barrels with five disk-shaped endplanes. The z extent of the barrels increases with radius and the endplane for each extends beyond its cylinder in radius to provide overlap. The sensitive medium is silicon, assembled into carbon-fiber/Rohacell/PEEK modules and read out via a bump-bonded chip and Kapton/Copper cables. These modules are supported by carbon-fiber/Rohacell/carbon-fiber barrels or disks. Each barrel cylinder is supported from the next barrel out by an annular carbon fiber-ring. Outside each of these support rings in z, G10/Copper printed circuit boards are mounted for power and readout distribution to all silicon modules in a layer.
Barrels:
The radii and z extent of the barrel silicon are:
layer | z | inner radius |
|---|---|---|
1 | 26.7 | 20.0 |
2 | 61.7 | 46.3 |
3 | 96.7 | 72.5 |
4 | 131.7 | 98.8 |
5 | 161.7 | 121.3 |
For the barrels, the support tubes are composed of .025cm CarbonFiber, 1.3cm of Rohacell31 and 0.25cm CarbonFiber. The sensor modules for the barrel are single-sided and have 0.03cm of silicon mounted on CarbonFiber/
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Rohacell31 frames that clip into PEEK (Polyetheretherketone) mounts. The average thickness of the CarbonFiber,
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Rohacell31 and PEEK in the modules of each barrel layer are 0.016cm, 0.14cm and 0.02cm repectively. The average thicknesses of the readout materials are 0.00048cm of Silicon, 0.0064cm of Kapton and 0.00065cm of Copper, however, the thickness of the cable material varies by layer.
Endcap:
The z positions and radial extents of the endcap silicon are:
layer | z | inner radius | outer radius |
|---|---|---|---|
1 inner | 30.0 | 4.0 | 25.0 |
1 outer | 30.4 | 4.0 | 25.0 |
2 inner | 65.0 | 7.9 | 51.3 |
2 outer | 65.4 | 7.9 | 51.3 |
3 inner | 100.0 | 11.8 | 77.5 |
3 outer | 100.4 | 11.8 | 77.5 |
4 inner | 135.0 | 15.6 | 103.8 |
4 outer | 135.4 | 15.6 | 103.8 |
5 inner | 165.0 | 18.9 | 126.3 |
5 outer | 165.4 | 18.9 | 126.3 |
where each layer is composed of double-sided sensor modules to measure coordinates in two views. The forward disk supports are composed of .039cm CarbonFiber, 2.5cm Rohacell31 and 0.039cm of CarbonFiber.
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The sensor modules mounted outside of the disks are double-sided and have 0.03cm of silicon mounted on either side of CarbonFiber/Rohacell31 frames that clip into PEEK (Polyetheretherketone) mounts. The average thickness of the CarbonFiber, Rohacell31 and PEEK in the modules of each disk double-layer is assumed to be the same as that for the barrel modules. The average thicknesses of the readout material are also assumed to be the same, but are repeated on both sides of the modules for double-sided readout.
The the z-positions and radial extents of the annular support rings that complete the structure of the tracker are:
layer | z | inner radius | outer radius |
|---|---|---|---|
1 | 26.7 | 18.0 | 44.3 |
2 | 61.7 | 44.3 | 70.5 |
3 | 96.7 | 70.5 | 96.8 |
4 | 131.7 | 96.9 | 119.3 |
5 | 161.7 | 119.3 | 127.0 |
These rings are composed of 0.15cm thick CarbonFiber. The readout and power distribution boards are mounted on the outside surfaces of these support rings. The regions occupied by these boards and the average thickness of the material they represent are given by:
layer | z | inner radius | outer radius | G10 thickness (cm) | Copper thickness (cm) |
|---|---|---|---|---|---|
1 | 27.0 | 25. |
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5 |
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44.3 | 0.057 |
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0. |
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0038 | |
2 | 62 |
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7.9
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46.75
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97.1
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11.7
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73.0
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132.1
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15.6
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99.25
.0 | 51.8 | 70.5 | 0.102 | 0.0068 | |
3 | 97.0 | 78.0 | 96.8 | 0.108 | 0.0072 |
4 | 132.0 | 104.3 | 119.3 | 0.186 | 0.0124 |
5 | 162.0 | 104.3 | 119.3 | 0.246 | 0.0164 |
Note that in layer five, due to the constraints of the calorimeter, the readout boards are not mounted on this annular ring, but rather at smaller radius.
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164.94
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19.5
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Calorimeters:
Electromagnetic Calorimeter:
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