The accelerator portion of the upgrade will be constructed on the framework of the existing CEBAF accelerator. A 12 GeV beam to Hall D and up to an 11 GeV beam is needed for Halls A, B, and C. To achieve this, the accelerator will be upgraded to 2.2 GeV/pass (1.1 GeV/linac) and the beam transport system upgraded and expanded. These upgrades will be made:
The CJ (CTEQ-Jefferson Lab) Collaboration studies the quark and gluon structure of the nucleon by performing global QCD fits of parton distribution functions (PDFs). These parametrize a vast array of data including deep-inelastic lepton-nucleon scattering, proton-proton collisions (lepton pair creation, W-boson and jet production), and other reactions, with particular focus on the large-x region.
P.C. Barry1, Chueng-Ryong Ji2, N, Sato1, and W. Melintchouk1
1 Jefferson Lab, Newport News, Virginia 23606, USA 2 Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA Jefferson Lab Angular Moment (JAM) Collaboration