CLIC 01 detector, SiD flavor

Overview

This detector concept is the first stable detector of the CLIC detector studies after the initial CLIC000 detector, which was derived from the SiD01 detector. CLIC01 is intended to test PFA performance at CLIC energies. The changes compared to its predecessor are based on the studies done in the meantime, which mostly focussed on the vertex detector and the HCAL performance.
  • moved inner layer of the vertex detector from 40mm to 30mm (other vertex layers, beampipe and support moved accordingly)
  • increased the vertex barrel |z| extent from 6.25cm to 10.0cm and moved the vertex disks out
  • changed HCAL barrel passive layer from 2.0cm tungsten to 1.0cm tungsten
  • changed number of HCAL barrel layers from 45 to 77 (8.5 interaction length)
  • changed HCAL endcap passive layers from 2.0cm tungsten to 2.0cm steel
  • changed number of HCAL endcap layers from 45 to 70 (9.0 interaction length, moved muon endcap accordingly)
  • made HCAL barrel, coil and muon barrel longer in order to cover the thicker HCal endcap
  • moved coil inner bore radius from 2.8m to 2.9m (moved muon barrel accordingly and increased muon endcap radius by 10cm)

Pictures

CLIC 01 (SiD) in numbers

Vertex Detector

The vertex detector is composed of a central barrel system with five layers and forward systems composed of four disks.

Barrel

The barrels are composed of .0113cm thick Silicon, of which the outer .002cm is sensitive, with the following inner radii and |z| extents:
Layer Inner Radius z Extent
1 3.06cm 10.00cm
2 3.86cm 10.00cm
3 5.16cm 10.00cm
4 6.46cm 10.00cm
5 7.76cm 10.00cm

Sensors are supported by cylinders made of 0.026cm thick carbon fiber with 25% coverage.

Layer Inner Radius z Extent
1 3.03cm 10.02cm
2 3.83cm 10.02cm
3 5.13cm 10.02cm
4 6.43cm 10.02cm
5 7.73cm 10.02cm

The cylinders attach to 0.026cm thick carbon fiber (25% coverage) bulkheads that span 3.04cm<r<11.56cm and have an inner |z| of 10.02cm. The vertex detector is attached to the support tube by 0.026cm thick carbon fiber (25% coverage) support disks that span 3.04cm<r<16.87cm and have an inner |z| of 10.05cm.

Disk

There are four forward disks on either end, composed of a total of .0113cm of silicon, of which the inner .002cm is sensitive. The radial extent and inner |z| for the disks are:
Layer Inner Radius Outer Radius Inner z
1 3.20cm 11.50cm 12.00cm
2 3.30cm 11.50cm 16.00cm
3 3.40cm 11.50cm 20.00cm
4 3.60cm 11.50cm 24.00cm

The forward disk supports are 0.026cm thick carbon fiber (25% coverage) disks located as follows:

Layer Inner Radius Outer Radius Inner z
1 3.195cm 16.87cm 12.03cm
2 3.295cm 16.87cm 16.03cm
3 3.395cm 16.87cm 20.03cm
4 3.595cm 16.87cm 24.03cm

Readout Electronics and Cabling

For the barrel, readout electronics are modeled as G10 rings that are currently located outside the support membrances:
Layer Inner Radius Outer Radius Inner z Thickness
1 3.06cm 3.26cm 10.15cm 0.5cm
2 3.86cm 4.06cm 10.15cm 0.5cm
3 5.16cm 5.36cm 10.15cm 0.5cm
4 6.46cm 6.66cm 10.15cm 0.5cm
5 7.76cm 7.96cm 10.15cm 0.5cm

Forward disk readout electronics are modeled as inner and outer rings, both made of G10:

Layer Inner Radius Outer Radius Inner z Thickness
1-in 3.1cm 3.2cm 11.8cm 0.2cm
2-in 3.2cm 3.3cm 15.8cm 0.2cm
3-in 3.3cm 3.4cm 19.8cm 0.2cm
4-in 3.5cm 3.6cm 23.8cm 0.2cm
1-out 11.5cm 12.0cm 11.8cm 0.2cm
2-out 11.5cm 12.0cm 15.8cm 0.2cm
3-out 11.5cm 12.0cm 19.8cm 0.2cm
4-out 11.5cm 12.0cm 23.8cm 0.2cm

Barrel cables first are brought radially down to the beam pipe. These radial cables are modeled as Cu disks:

Inner Radius Outer Radius Inner z Thickness
2.92cm 3.86cm 10.65cm 0.0057cm
3.86cm 5.16cm 10.65cm 0.0031cm
5.16cm 6.46cm 10.65cm 0.0016cm
6.46cm 7.76cm 10.65cm 0.0007cm

The remaining cable and service materials are located along the beam pipe. Inner cables are 0.01cm thick copper and run conically from an inner radius of 2.98cm at |z|=11.8cm to a radius of 3.155cm at |z|=17.0cm. Service material is 0.3cm thick G10 that runs conically from an inner radius of 3.155cm at |z|=17cm to 3.212cm at |z|=19cm. Outer cables are modeled as copper that flares from a thickness of 0.010cm with an inner radius of 3.212cm at |z|=19cm to a thickness of 0.004cm with an inner radius of 8.558cm at |z|=167.9cm.

Support Tube

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| extent of |z|<89.48cm. The ends of the support tube double-walled disks of 0.05cm thick carbon fiber disks located as follows:
Wall Inner Radius Outer Radius Inner z
inner 5.71cm 16.87cm 86.88cm
outer 5.80cm 16.87cm 89.43cm

Forward Tracker

There are also three forward disks at small angles composed of pixel sensor modules. The table below shows the radial extent of the disks and the inner |z| positions for the sensor planes.
Layer Inner Radius Outer Radius Inner z
1 3.7cm 16.67cm 28.00cm
2 7.5cm 16.67cm 50.00cm
3 11.7cm 16.67cm 82.95cm

Each sensor plane has the following material thicknesses:

Material Thickness
Silicon (active) 0.002cm
Silicon (dead) 0.028cm
Carbon Fiber (25%) 0.026cm

Main Tracker

The tracker is composed of five cylindrical barrels with four 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| extents of the barrel silicon layers are:
Layer Inner Radius z Extent
1 21.8cm 55.8cm
2 46.8cm 82.5cm
3 71.8cm 108.3cm
4 96.8cm 134.7cm
5 121.8cm 160.6cm

The estimated material thickness for modules, silicon, readout, and cables are averaged over the barrel and are given by:

Material Layer 1 Layer 2 Layer 3 Layer 4 Layer 5
PEEK 0.02cm 0.02cm 0.02cm 0.02cm 0.02cm
Rohacell31 (50% coverage) 0.28cm 0.28cm 0.28cm 0.28cm 0.28cm
Epoxy 0.0175cm 0.0175cm 0.0175cm 0.0175cm 0.0175cm
Carbon Fiber 0.016cm 0.016cm 0.016cm 0.016cm 0.016cm
Silicon (active) 0.03cm 0.03cm 0.03cm 0.03cm 0.03cm
Silicon (dead) 0.00048cm 0.00048cm 0.00048cm 0.00048cm 0.00048cm
Kapton 0.0038cm 0.0051cm 0.0064cm 0.0078cm 0.0091cm
Copper 0.00038cm 0.00052cm 0.00065cm 0.00079cm 0.00093cm

The barrel support cylinders are composed of .05cm CarbonFiber, 0.80cm of Rohacell31 (15% coverage) and 0.05cm CarbonFiber. The inner radii and |z| extent are given by:

Layer Inner Radius z Extent
1 20.6cm 57.7cm
2 45.6cm 84.3cm
3 70.6cm 110.2cm
4 95.6cm 136.6cm
5 120.6cm 162.4cm

The barrels are supported by 0.05cm thick carbon fiber (15% coverage) rings:

Layer Inner Radius Outer Radius Inner z
1 21.5cm 45.6cm 57.0cm
2 46.5cm 70.6cm 83.6cm
3 71.5cm 95.6cm 109.5cm
4 96.5cm 120.6cm 135.9cm
5 121.5cm 126.5cm 161.7cm

Endcap

Each layer is composed of two sensor modules to measure coordinates in two stereo (u-v) views. The table below shows the radial extent of the disks and the inner |z| position for the "A" and "B" sensor planes.
Layer Inner Radius Outer Radius z for A Plane z for B Plane
1 20.7cm 49.4cm 85.5cm 85.9cm
2 20.7cm 74.7cm 111.4cm 111.8cm
3 20.7cm 99.9cm 137.8cm 138.2cm
4 20.7cm 125.0cm 163.6cm 164.0cm

Each A plane has the following material thicknesses:

Material Layer 1 Layer 2 Layer 3 Layer 4
Silicon (active) 0.03cm 0.03cm 0.03cm 0.03cm
Silicon (dead) 0.00048cm 0.00048cm 0.00048cm 0.00048cm
Kapton 0.0051cm 0.0064cm 0.0078cm 0.0091cm
Copper 0.00052cm 0.00065cm 0.00079cm 0.00093cm
PEEK 0.02cm 0.02cm 0.02cm 0.02cm
Rohacell31 (50% coverage) 0.3cm 0.3cm 0.3cm 0.3cm
Epoxy 0.0175cm 0.0175cm 0.0175cm 0.0175cm
Carbon Fiber 0.016cm 0.016cm 0.016cm 0.016cm

Each B plane has the following material thicknesses:

Material Layer 1 Layer 2 Layer 3 Layer 4
Silicon (active) 0.03cm 0.03cm 0.03cm 0.03cm
Silicon (dead) 0.00048cm 0.00048cm 0.00048cm 0.00048cm
Kapton 0.0051cm 0.0064cm 0.0078cm 0.0091cm
Copper 0.00052cm 0.00065cm 0.00079cm 0.00093cm

The endcap supports are disks made of two 0.05cm thick Carbon Fiber planes separated by a 0.63cm thick layer of Rohacell31 (15% coverage). The radial span and inner z coordinate are:

Layer Inner Radius Outer Radius Inner z
1 20.5cm 51.0cm 84.5cm
2 20.5cm 76.3cm 110.3cm
3 20.5cm 101.3cm 136.7cm
4 20.5cm 126.3cm 162.6cm

Services

The readout and power distribution boards are mounted on the outside surfaces of the barrel support rings. The regions occupied by these boards and the average thickness of the material they represent are given by:
Layer Inner Radius Outer Radius Inner z G10 Thickness Copper Thickness
1 25.7cm 45.6cm 57.1cm 0.057cm 0.0038cm
2 51.0cm 70.6cm 83.7cm 0.102cm 0.0068cm
3 76.3cm 95.6cm 109.6cm 0.108cm 0.0072cm
4 101.3cm 120.6cm 136.0cm 0.186cm 0.0124cm
5 101.3cm 120.6cm 167.0cm 0.246cm 0.0164cm

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.

Calorimeters

Electromagnetic 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.
The EM calorimeter is a sampling calorimeter composed of 20 layers of
material thickness
Tungsten 0.25cm
G10 0.068cm
Silicon 0.032cm
Air 0.025cm

followed by ten layers of

material thickness
Tungsten 0.5cm
G10 0.068cm
Silicon 0.032cm
Air 0.025cm

The endcap plug sits inside the barrel cylinder, so the barrel z extent is +/- 182.0cm.
The endcap starts at an inner radius of 26cm and extends out to 126.5cm.
The readout cell size is 3.5mm * 3.5mm.

Hadron Calorimeter

Barrel
The hadron calorimeter barrel is a sampling calorimeter composed of 77 layers of
material thickness
Tungsten 1.0cm
Polysterene 0.5cm
G10 0.25cm

It begins immediately outside of the EM calorimeters, with an inner radius of 141.0cm and a |z| extent of +/- 374.5cm.
The readout cell size is 1cm * 1cm.

Endcap
The hadron calorimeter endcap is a sampling calorimeter composed of 70 layers of
material thickness
Steel 2.0cm
Polysterene 0.5cm
G10 0.25cm

It begins immediately outside of the EM calorimeters, with an inner z of 182.0cm. It extends from an inner radius of 26.0cm to an outer radius of 140.75cm
The readout cell size is 1cm * 1cm.

Solenoid

The solenoid is modelled as a cylinder with an inner radius of 290cm. 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 dodecagonal). The barrel composition is as follows:
material thickness z
Steel 6.0cm 374.4cm
Air 8.5cm 374.4cm
Aluminum 39.3cm 366.0cm
Steel 6.0cm 366.0cm
Air 20.0cm 374.4cm
Steel 3.0cm 374.4cm

This is capped with disk endplates of 6cm steel from r=290cm to 372.8cm.

Magnetic Field

The field is solenoidal, constant 5.0T along z up to half the coil thickness and -0.6T outside.

Muon System

The myon system is implemented as an sampling calorimeter composed of 48 layers of:
material thickness
Iron 5.0cm
G10 0.3cm
Pyrex Glass 0.11cm
RPC Gas 0.12cm
Pyrex Glass 0.11cm
Air 0.86cm

The barrel inner radius is 373.0cm with |z| extent of 380.4cm.
The endcap sits outside the barrel at an inner z of 380.9cm and radius from 26.0cm to 685.0cm
The readout cell size is 3cm * 3cm

Masks and Far Forward Detectors

The far forward region is designed for the 20mr beam crossing solution so has separate incoming (inner radius 1.0cm) and outgoing (inner radius 1.5cm) beampipes. The far forward plug is designed to fit within a radius of 26cm. It starts with an electromagnetic calorimeter (LumiCal) with the same composition as the endcap calorimeter, extending from 8.69cm out to 25.0cm.
The calorimeter is backed up by a conically tapered tungsten mask, inner radius 8.68cm at z of 182cm, tapering to 16cm at z of 333.0cm. The outer radius is constant at 25.0cm.
There is a far forward low-Z mask (10.0cm thick Beryllium) with an inner z of 285cm.
This is followed by a 50 layer silicon-tungsten calorimeter (BeamCal) with an inner z of 295cm.


-- ChristianGrefe - 03 Mar 2009

Topic attachments
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Unknown file formateps clic01_sid_central.eps r1 manage 19462.5 K 2009-04-29 - 17:13 ChristianGrefe  
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