We need to progress step by step the mirror mass (~150 kg)

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Presentation transcript:

Open discussion: a) moving toward finalization of the ET conceptual design We need to progress step by step the mirror mass (~150 kg) the material of the bulk (silicon) The fiber material (silicon crystal thin rods/ aluminum /niobium) Coating material choice Coating procedure (standard vs no standard) Optical performances ( total absorption) Heat load and working Temperature Geometry of the last stage suspension Control strategy and related noise issue Actuators and local sensing Upper suspension geometry Thermal issues along the chain and at the payload interface Newtonian coupling including the effect at the interface of the last stage

The agenda of the WG2 session in Erice Main topics -Suspension upper part - suspension lower part - bulk properties - coating properties - actuator sensors - cooling issues …………………………………

Setting up a calendar for the next meetings The paradigm: we call for meetings in anticoincidence with LVC ( ~ 1month of itme window) Date November 2009 February 2010 April/May 2010 July 2010 November 2010 February 2011 April/May 2011 July 2011 November 2011

Finding the location for new meetings Jena, Germany Glasgow, Scotland (?) Trento/Padova, Italy (?) Hannover , Germany (?) CERN, Switzerland (???) /Giessen, (Germany) (???) Nikhef, Netherland (?) Lyon, (France) (?) Napoli, (Italy) (?) XXXXXXXXXXXXXXXX