2S module geometry updates Module positioning concepts Tracker Phase 2 Upgrade Meeting, 24 May 2012 Report on 2S module mechanics Refers to work and inputs by Tristan Falcy, Antonio Conde Garcia, Luc Kottelat, Stefano Mersi, Giovanni Bianchi, Duccio Abbaneo, Andreas Mussgiller, Nick Lumb, Antti Onnela 2S module geometry updates Module positioning concepts Towards first 2S dummy modules 2S module mechanics, 24 May 2012 Antti Onnela, CERN

2S module geometry updates 2S module mechanics, 24 May 2012 Antti Onnela, CERN

“End-cap” and “Barrel” 2S modules “End-cap” 2S module with 4 mm sensor distance (“air gap”). Version under study since 2011, used in FE analysis (Desy) and End-cap geometry studies (Lyon). Now only minor geometry updates in the module supports and hybrids. New “Barrel” 2S module with 1.4 mm sensor distance. Due geometry effect, for the same track momentum cut the sensor distance in the barrel module shall be smaller than in the end-cap. Updated End-cap and Barrel module 3D models will soon be available in the Upgrade website: https://espace.cern.ch/Tracker-Upgrade/2S-Module/SitePages/Home.aspx Following further tracker layout studies these sensor gaps may still evolve in future. Silicon sensor Base-line sensor spacing, following the current TK layout studies: 4 mm in “End-cap” modules 1.4 mm in “Barrel” modules Silicon sensor 2S module mechanics, 24 May 2012 Antti Onnela, CERN

2S modules in barrel (Rod) geometry 2 alternatives being studied: Modules upside up or upside down. Modules upside up + Radial distance between adjacent sensors is minimized + Connectors are well exposed Total thickness is potentially rather big (here 24 mm). Thickness depends directly on the biggest components Tight space for module supports and thermal contacts Modules upside down + Total thickness minimized (here 15 mm), allowing compact barrel layers + Components are not exposed (= better protected) in the final assembly + Good space for module supports and thermal contacts Radial distance between adjacent sensors is big. Difficult access to connectors on the module 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Module positioning concepts 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Module support and positioning: TOB Support structure (Rod) 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Module support and positioning: TIB Support structure (Cylinder) 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Module support and positioning: TEC Support structure (Petal) 2S module mechanics, 24 May 2012 Antti Onnela, CERN

And the net result with TK precision? Already after first cosmic runs the total residuals with Track Based Alignment are at ~50um rms, and improve within 2008 to ~30um. Much better than what the mechanics can (reasonably) do! 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Choice of module positioning concept? All used module positions solutions in the present Tracker have shown to be sufficiently precise, especially after track-based software alignment. TIB / TEC module positioning is more compact and lighter than the TOB solution. Use the TIB / TEC solution as basis in the 2S module Try to also include captive screws, which do not need to be handled individually during module testing and assembly phases. 2S module mechanics, 24 May 2012 Antti Onnela, CERN

2S module positioning: First thoughts Positioning similar to TIB/TEC Captive screws Module placed on supports Module Positioning Screws tightened Support structure 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Towards first 2S dummy modules 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Towards first 2S dummy modules Soon we will be able to produce the first dummy modules Dummy sensors are in procurement Include heating, temp measurement, bond pads, positioning targets Different R&D / dummy versions of other module components will be available. How to make first thermo-mechanical tests on the dummy modules? One option is to use our ~30 existing spare TOB Rod frames Carbon fibre structure Cooling is included Setups for supporting and cooling rods exist But, module supports in wrong places for 2S modules  Adaptors needed. 2S module mechanics, 24 May 2012 Antti Onnela, CERN

TOB Rod with 2S modules 2S module Adaptor TOB Rod frame 2S module mechanics, 24 May 2012 Antti Onnela, CERN

TOB Rod with 2S modules 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Adaptor First adaptors are being made now. Will be tried in June with ultra-dummy modules in aluminium. Then towards more intelligent dummies... 3 connection bars in carbon-fibre composite 4 support/cooling contacts in aluminium 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Summary Progressing with 3D modelling of the 2S modules New updated versions of the Barrel and End-cap 2S modules will be made soon available (in ~1 week) on the Upgrade Sharepoint site https://espace.cern.ch/Tracker-Upgrade/2S-Module/SitePages/Home.aspx Module positioning studies have started First mechanical samples and tests within June-July Producing adaptors for mounting 2S modules on TOB Rod frame. Will be tried in June. If proven ok, further adaptors can be made and TOB Rod frames provided for test use in different labs. Contact me if you are interested in receiving such test material. 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Thank you for your attention. 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Spare slides 2S module mechanics, 24 May 2012 Antti Onnela, CERN

2S module, Jan 2012 version 3D models by A. Conde Garcia / CERN 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Module positioning: TIB Inputs from A. Basti / INFN Pisa Precision insert Slot insert Inserts with clearance 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Module positioning: TEC Inputs from M. Wlochal / Aachen 2S module mechanics, 24 May 2012 Antti Onnela, CERN

Module positioning: TOB 2S module mechanics, 24 May 2012 Antti Onnela, CERN