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Extra info for Status of US LHC Research Program [presentation slides]
Sample text
US work on machine commissioning will speed LHC turn on. • US accelerator physicists’ calculations and experiments to - understand performance limitations of current configuration - develop advanced instruments and controls - develop solutions to performance limitations will help maximize the delivered luminosity to ATLAS and CMS. A. g. A. Neal, Status of the US LHC Research Program, Presentation to HEPAP, March 6, 2003 32 SLHC Detector R&D - I Inner Tracker: rebuild • r < 20 cm: new approach, 20 < r < 60 cm: extend pixel technology, 60 cm < r: extend strip technology • New approaches: defect-engineered Si, 3D detectors, new sensor materials, cryogenic Si, monolithic pixels Calorimetry: usable with caveats • ATLAS (Liquid Argon): Front end board should be redesigned either by making components more radiation resistant, and/or use analog optical links to bring the signals out.
Understand the limitations of the current machine configuration, particularly the IRs, and develop modifications. • Low β* insertion sections: (separation dipoles, triplet quads) • Develop high-field Nb3Sn magnets for new low β * insertion, for example: quad aperture 70 -> 110 mm => β * 50 -> ~17 cm. 0 22 44 Rel. g. f. S. A. S. S. Role in Machine R&D Nb3Sn has never been used before in an accelerator. • Intensive R&D program required, starting soon. • “Small-scale” application in luminosity upgrade is a stepping stone towards large scale use as main magnets of a future machine.
Could be either dipole or quadrupole. • Greatest opportunity to advance our capabilities for the future. • Best chance for earliest possible upgrade … we can start sooner than CERN. S. labs. • We do not have the resources to develop all the required IR magnets. • Expect Nb3Sn R&D to start at CERN ~2006-2007. R&D relevant to a possible EDLHC is covered by the base R&D program. • Key questions of maximum field and cost minimization aren’t LHC specific. • High-field dipole programs at FNAL, LBNL, and BNL are addressing these now.