[SLAC] [SLAC Pubs and Reports]
SLAC-PUB-7883
New Final Focus Concepts at 5 TeV and Beyond
Abstract
At multi-TeV energies, the length of conventional beam-delivery
systems becomes excessive, raising doubts about the value of a
compact, high-gradient accelerator to future high-energy physics. In
this paper, the reasons for the unfavorable length scaling are
discussed, and alternative design concepts are described, for which
final focus and collimation systems are orders of magnitude shorter
and which produce higher luminosity at lower beam power than
conventional approaches. These concepts include a sextupole-free final
focus, linac energy-spread compensation, bunch combination and laser
collimation. They are compatible with novel acceleration techniques,
such as an active matrix linac. A consistent parameter set for a 5 TeV
collider is presented.
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