The International Large Detector: Letter of Intent - High Energy Physics - ExperimentReport as inadecuate

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Abstract: The International Large Detector ILD is a concept for a detector at theInternational Linear Collider, ILC. The ILC will collide electrons andpositrons at energies of initially 500 GeV, upgradeable to 1 TeV. The ILC hasan ambitious physics program, which will extend and complement that of theLarge Hadron Collider LHC. A hallmark of physics at the ILC is precision. Theclean initial state and the comparatively benign environment of a leptoncollider are ideally suited to high precision measurements. To take fulladvantage of the physics potential of ILC places great demands on the detectorperformance. The design of ILD is driven by these requirements. Excellentcalorimetry and tracking are combined to obtain the best possible overall eventreconstruction, including the capability to reconstruct individual particleswithin jets for particle ow calorimetry. This requires excellent spatialresolution for all detector systems. A highly granular calorimeter system iscombined with a central tracker which stresses redundancy and efficiency. Inaddition, efficient reconstruction of secondary vertices and excellent momentumresolution for charged particles are essential for an ILC detector. Theinteraction region of the ILC is designed to host two detectors, which can bemoved into the beam position with a push-pull scheme. The mechanical design ofILD and the overall integration of subdetectors takes these operationalconditions into account.

Author: The ILD Concept Group


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