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ILC.DescripcionDeLaEstructuraDelILDr1.1 - 18 Sep 2009 - 08:40 - Main.iglesiastopic end

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0. El detector ILD

0.c. Descripcion de la estructura del ILD

The proposed ILD concept is designed as a multi-purpose detector, which provides excellent precision in spatial and energy measurement over a large solid angle. It has the following components:
  • A multi-layer pixel-vertex detector (VTX), with three super-layers each comprising two layers. To minimise the occupancy from background hits, the first super-layer it is only half as long as the outer two. Whilst the underlying detector technology has not yet been decided, the VTX is optimised for excellent point resolution and minimum material thickness. A five layer geometry, VTX-SL, with the layers spaced at equal distances to the IP is investigated as an alternative. In either case the vertex detector has a purely barrel geometry.
  • A system of strip and pixel detectors surrounding the VTX detector. In the barrel, two layers of Si strip detectors (SIT) are arranged to bridge the gap between the VTX and the TPC. In the forward region, a system of Si-pixel and Si-strip disks (FTD) provides low angle tracking coverage.
  • A large volume time projection chamber (TPC) with up to 224 points per track. The TPC is optimised for excellent 3-dimensional point resolution and minimum material in the field cage and in the end-plate. It also provides dE/dx based particle identification capabilities.
  • A system of Si-strip detectors, one behind the end-plate of the TPC (*ETD) and one in between the TPC and the ECAL (SET). These provide additional high precision space points which improve the tracking measurements and provide additional redundancy in the regions between the main tracking volume and the calorimeters.
  • A highly segmented ECAL providing up to 30 samples in depth and small transverse cell size. Two technology options are considered; Si-W and scintillator-W.
  • A highly segmented HCAL with up to 48 longitudinal samples and small transverse cell size. Two options are considered, both based on a Steel-absorber structure. One option uses scintillator tiles of 3 3 cm2, which are read out with an analogue system. The second uses a gas-based readout which allows a 1 1 cm2 cell geometry with a binary or semi-digital readout of each cell.
  • A system of high precision, radiation hard, calorimetric detectors in the very forward region (LumiCAL, BCAL, LHCAL). These extend the calorimetric coverage to almost 4pi, measure the luminosity, and monitor the quality of the colliding beams.
  • A large volume superconducting coil surrounds the calorimeters, creating an axial Bfield of nominally 3.5Tesla.
  • An iron yoke, instrumented with scintillator strips or RPCs, returns the magnetic flux of the solenoid, and at the same time, serves as a muon filter, muon detector and tail catcher.
  • A sophisticated data acquisition (DAQ) system which operates without an external trigger, to maximise the physics sensitivity.


The ILD 00 detector model as implemented in Mokka. From the inside to the outside, the detector components are the: VTX, SIT, TPC, SET, ECAL, HCAL and Yoke. In the forward region the FTD, ETD, LCAL, LHCAL and BCAL are shown.


-- Main.iglesias - 18 Sep 2009
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I Attachment sort Action Size Date Who Comment
Layout_ILD_from_LOI.jpg manage 103.8 K 18 Sep 2009 - 08:30 Main.iglesias  
Perfil_Layout_ILD_from_LOI.jpg manage 31.9 K 18 Sep 2009 - 09:01 Main.iglesias  

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