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Problems Difficult international environment No adequate host lab
What do we learn from this history?
Günther Rosner NuPECC Madrid 7/3/08 8
USA: Electron-Ion Collider 20-100 GeVcom
Günther Rosner NuPECC Madrid 7/3/08 9
An Electron-Ion Collider (EIC) with polarized beams has been embraced by the U.S. nuclear science community as embodying the vision for reaching the next QCD frontier. EIC would provide unique capabilities for the study of QCD well beyond those available at existing facilities worldwide and complementary to those planned for the next generation of accelerators in Europe and Asia. In support of this new direction:
We recommend the allocation of resources to develop accelerator and detector technology necessary to lay the foundation for a polarized Electron Ion Collider. The EIC would explore the new QCD frontier of strong color fields in nuclei and precisely image the gluons in the proton.
NSAC 2007
Günther Rosner 10NuPECC Madrid 7/3/08
Develop the Science Case Choose Site? Develop Sound Cost Basis What is cost versus science tradeoff Secure the NP doubling budget LRP 2012 very important (i.e. critical?) for EIC
Robert Tribble, 7 Dec 2007
NSAC
Günther Rosner 11NuPECC Madrid 7/3/08
CERN: Large Hadron electron Collider
Günther Rosner NuPECC Madrid 7/3/08 12
Parton distribution functions
Günther Rosner NuPECC Madrid 7/3/08 13
LHeC double rings
Günther Rosner NuPECC Madrid 7/3/08 14
LHeC roadmap
Feasibility study endorsed by CERN and ECFA First ECFA-CERN Workshop on the LHeC in Divonne,
1-3/9/08 Goal: Conceptual Design Report by end of 2009,
early 2010, on: Accelerator Interaction regions Detector Infrastructure Physics
New Physics High Precision QCD + electroweak High parton densities (low x + eA)