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Civil Engineering works for Linear Colliders* : -Brief introduction on the overall machine layout (just for CLIC at this stage) -Experimental Area Layout for CLIC -Experimental Area Layout for ILC -CMS concept -What next ? *CLIC=Compact Linear Collider, ILC=International Linear Collider J.Osborne & M.Gastal (CERN) for CLIC & V.Kuchler (Fermilab) for ILC 2

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CLIC Detector hall layout developed by : A.Gaddi H.Gerwig A.Herve CES will now use this as starting point for CE & services design, including cost estimates

Detector Caverns (60×28×28m) linked together by a transfer Tunnel * Driven by Push-Pull concept * Offers stability at the interface between the tunnel and the detector

14 The detector would be moved into beam position on a moving platform The concept could be similar to the PX56 plug (2200 tons) N Siegrist – PH-CMX

ILC IR Layout (CERN) Date EventGlobal Design Effort 15

RDR Baseline Layouts for Interaction Region

ILC 3d models developed at CERN using CATIA : CLIC models to follow once draughtsman is identified

2004 Sliding Cover over the CMS experimental shaft CMS Concrete platform just before concreting

2004 Sliding Cover complete prior to completion of Phase 2 of experimental building

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Main Goals of this workshop The goals are the mini-workshop are to see how we proceed with a design study for : 1. The underground concrete platforms envisaged to move the detectors on/off the beamline 2. Ground movement / vibration studies i.e. potential movements induced from caverns excavation and detector movement 21