C3 Demonstration Research and Development Plan
Abstract
C3 is an opportunity to realize an e+e- collider for the study of the Higgs boson at s = 250 GeV, with a well defined upgrade path to 550 GeV while staying on the same short facility footprint. C3 is based on a fundamentally new approach to normal conducting linear accelerators that achieves both high gradient and high efficiency at relatively low cost. Given the advanced state of linear collider designs, the key system that requires technical maturation for C3 is the main linac. This white paper presents the staged approach towards a facility to demonstrate C3 technology with both Direct (source and main linac) and Parallel (beam delivery, damping ring, ancillary component) R&D. The white paper also includes discussion on the approach for technology industrialization, related HEP R&D activities that are enabled by C3 R&D, infrastructure requirements and siting options.
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