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This detector has been superseded by the sidaug05 detector, which contains improved modeling of the tracker support and readout materials as well as a definition of the far forward machine-detector interface for the 2 milliradian crossing angle. |
This is the version of the Silicon Detector modelled as of May 31, 2005.
The compact description of this detector in xml format can be found at http://www.lcsim.org/detectors/sidmay05.zip . What follows is a plain text description of the file compact.xml found in the above this zip file.
The tracking region is defined to be a cylinder with radius 125.5cm and z extent +/- 167.9cm.
Beampipe:
The beampipe is composed of three sections: a cylindrical central tube and forward and backward conical sections.
The central tube has an inner radius of 1.2cm and a z extent of +/- 6.251cm and is made of .025cm thick Beryllium.
The conical sections are 1mm thick Beryllium and flare from 1.2cm inner radius at 6.25cm to 8.13cm at the edge of the tracking region.
The central tube has a titanium inner liner .005cm thick.
Vertex Detector:
The vertex detector is composed of a central barrel system with five layers and forward systems composed of four disks.
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The barrel cryostat is a cylinder 0f 1.5cm PolystyreneFoam with inner radius 11.2cm and z extent +/- 23.0cm.
The endplate cryostats are disks of 3.0cm PolystyreneFoam with inner radius 2.3cm, outer radius 11.2cm and inner z of 20.0cm.
Tracker:
The tracker is composed of five barrels with five endplates. The z extent of the barrels increases with radius.
The sensitive medium is silicon, supported with CarbonFiber/Rohacell/Carbonfiber barrels or disks.
Barrels:
For the barrels, the support tubes are composed of .025cm CarbonFiber, 1.3cm of Rohacell31 and 0.25cm CarbonFiber.
The sensitive medium is .03cm of silicon mounted on the outer radius of the support cylinders.
The inner radii and z extent of the cylindrical layers are:
z | inner radius |
|---|---|
26.67 | 18.635 |
61.67 | 44.885 |
96.67 | 71.135 |
131.67 | 97.385 |
164.90 | 123.635 |
Endcap:
The forward disk supports are composed of .039cm CarbonFiber, 2.5cm Rohacell31 and 0.039cm of CarbonFiber.
The sensitive medium is 0.3cm of silicon and is consists of a back-to-back double layer for stereo readout.
These are mounted on the inner side of the support disks.
z | inner radius | outer radius |
|---|---|---|
27.1 | 4.0 | 20.5 |
62.1 | 7.9 | 46.75 |
97.1 | 11.7 | 73.0 |
132.1 | 15.6 | 99.25 |
164.94 | 19.5 | 125.5 |
Calorimeters:
Electromagnetic
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Calorimeter:
This element sets the basic size and aspect ratio for the rest of the detector. The inner radius for the barrel is 127cm. The aspect ratio is set to cos(theta)=0.8, meaning the inner z of the endcap EM calorimeter is at z of 168cm.
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The endcap plug sits inside the barrel cylinder, so the barrel z extent is +/- 179.5cm.
The endcap starts at an inner radius of 20cm and extends out to 125cm.
Hadron calorimeter:
The hadron calorimeter is a sampling calorimeter composed of 34 layers of
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The barrel inner radius is 138.5 with a z extent of +/- 277cm.
The endcap extends from an inner radius of 20.0 cm to an outer radius of 138.25, inner z of 179.5
Solenoid:
The solenoid is modelled as a cylinder with an inner radius of 250cm. This is larger than the outer radius of the hadron calorimeter since we will not be building a cylindrical detector, but a polygonal one (current thinking is octagonal). The barrel composition is as follows:
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This is capped with disk endplates of 6cm steel from r=250cm to 332.8cm
Muon System:
The muon system is implemented as a sampling calorimeter composed of 48 layers of:
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The field is solenoidal, constant 5 Tesla along z up to half the coil thickness and -0.6 outside.