This is a version of the Large Detector modelled as of Oct. 1, 2005. The compact description of this detector in xml format can be found at http://www.lcsim.org/detectors/ld3.1-oct05.zip . What follows is a plain text description of the file compact.xml found in this zip file.
The tracking region is defined to be a cylinder with radius 175. cm and z extent +/- 282. cm.
Beampipe:
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Vertex Detector:
---------------
The vertex detector is composed of a central barrel system with five layers.
The first barrel layer is 10 cm long and the rest are 25. cm long, and are composed of 0.028 cm Beryllium and a .0005 cm Silicon slice which is sensitive.
The inner radii of the layers are:
1.55, 2.7, 3.8, 4.9, 6.0
Tracker:
-------
The intermediate tracker is composed of two barrels composed of 0.05616 cm of silicon.
The inner radii and z extent of the two barrel layers are:
z |
inner radius |
|---|---|
16. |
29. |
30. |
63. |
The small angle endcap tracker is composed of 5 double sided disks with sensitive slices of 0.03 cm silicon.
The position and size of the disks are:
z |
inner radius |
outer radius |
|---|---|---|
30.0 |
4.0 |
25.0 cm |
65.0 |
7.9 |
30.0 cm |
120. |
11.8 |
30.0 cm |
180. |
15.6 |
30.0 cm |
240. |
18.9 |
30.0 cm |
The central TPC tracker consists of a 250 cm long, 161.8 cm radius sensitive volume filled with P10 gas.
The inner and outer carbon-fiber field cages are at radii of 32. and 161.8 cm.
The forward TPC endcap tracker consists of a double-sided disk with sensitive slices of 0.03 cm silicon at
z = 279 cm with inner and outer radii of 26 and 185 cm.
Calorimeters:
Electromagnetic Calorimeter:
---------------------------
The inner radius for the barrel is 175 cm.
The EM calorimeter is a sampling calorimeter composed of 20 layers of
material |
thickness |
|---|---|
Tungsten |
.250cm |
G10 |
.068cm |
Silicon |
.032cm |
Air |
.025cm |
follow by 10 additional layers with 0.5 cm Tungsten.
The z extent of the barrel cylinder is +/- 275 cm.
The endcap starts at an inner radius of 26 cm and extends out to 185 cm.
Hadron calorimeter:
------------------
The hadron calorimeter is a W scintillator sampling calorimeter composed of 50 layers of
material |
thickness |
|---|---|
Tungsten |
0.75 cm |
Polystyrene |
0.5 cm |
G10 |
0.25 cm |
The barrel inner radius is 195 cm with a z extent of +/- 275 cm.
The endcap extends from an inner radius of 26 cm to an outer radius of 260 cm.
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:
material |
thickness |
z |
|---|---|---|
Steel |
6.0cm |
360 cm |
Air |
8.5cm |
360 cm |
Aluminum |
39.3cm 340 cm |
|
Steel |
6.0cm |
340 cm |
Air |
20.0cm |
360 cm |
Steel |
3.0cm |
360 cm |
This is capped with disk endplates of 6cm steel from r=294.5 cm to 339.8 cm.
Muon System:
-----------
The muon system is implemented as a sampling calorimeter composed of 48 layers of:
material |
thickness |
|---|---|
Iron |
5.0 cm |
G10 |
0.3 cm |
PyrexGlass |
0.11 cm |
RPCGas |
0.12 cm |
PyrexGlass |
0.11 cm |
Air |
0.86 cm |
The barrel inner radius is 380 cm with z extent of +/- 375 cm.
The endcap sits outside the barrel at an inner z of 380 cm and radius from 26 cm to 690 cm.
The field is solenoidal, constant 4 Tesla along z up to half the coil thickness and -0.6 outside.
Masks and far forward detectors remain to be implemented.