GianLucca Sappi
(LBNL)
Abstract:
Starting with the invention of the cyclotron by Lawrence, accelerator-based experiments have been the primary source of new discoveries in particle physics. The Large Hadron Collider is the world’s more powerful accelerator, presently operating at a center-of-mass energy of 7 TeV and gradually progressing towards its design value of 14 TeV. At this energy, the dipole field is 8.3 T, obtained using Niobium-Titanium (NbTi) conductor at 1.9 K. After several years of LHC operation in nominal conditions, performance upgrades will be required to maintain its potential for new discoveries. Current plans involve a luminosity upgrade with a goal of 3000 fb-1 integrated luminosity, followed by an energy upgrade aiming at doubling the center of mass energy. Both the luminosity and energy upgrades require very high field magnets, operating well beyond the fundamental limits of NbTi. R&D programs are underway to take advantage of new developments in superconducting materials, achieve better efficiency and simplify magnet fabrication while preserving accelerator-class field quality. A review of recent progress on high field dipole and quadrupole magnets will be presented.
GianLuca Sabbi received his Doctoral Degree in 1995, with a Thesis on beam instabilities at CERN’s Large Electron Positron collider. From 1996 to 2000, he held an Associate Scientist position at Fermilab, where he contributed to the development of the MQXB IR quadrupoles for LHC. He is presently Head of the Superconducting Magnet Program at Lawrence Berkeley National Laboratory and leads the magnet R&D component of the LHC Accelerator Research Program (LARP).