Tracking in SuperLHC 1. Radiation damage Design luminosity =10xLHC Running time = ½ LHC Radiation dose = 5xLHC Inner layers of SiTrk (r=20cm) are expected to be operated at 600V after 10 years of LHC SuperLHC  3kV (?!) Need replacement Need improved more rad hard technology

Tracking in SuperLHC 2. resolution ADC Strips R=20 cm With collider energy and/or luminosity increase (e.g. SLHC) the emphasis shifts towards higher energy jets. Energetic jets are more collimated  need higher coordinate resolution 7% of tracks in 500 GeV jets have merged hits 2.5% of tracks in 100 GeV jets

Why now? CMS SiTrk detectors design time line RD2 report – 1994 CMS technical proposal - 1994 RD20 report - 1995 RD48 report – 1997 Start construction phase 2003 Start data taking 2007 = 1994+13years SuperLHC start data taking 2017 RD?? report 2017-13=2004 RD50 is formed 10/02 to address the needs of Super LHC

Why in US? Unique experience Construction and operation of SiTrk in hadron environment We know what to do and what not to do Real life experience in using SiTrk data Understanding si clusters and resolution CMS construction in the US = TOB + Forward pixels Experience with CMS detector structure and DAQ

RD50 Approved by CERN 06/02 52 institutions, 5 from US (Fermilab, Purdue, Rutgers, Syracuse, BNL), 2 interested to join UCSB, UR Areas of research Material engineering Oxygenation, si carbite Device engineering Pad, 3D, thin detectors Rad hard technologies used for LHC are not completely characterized