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This
report describes studies performed in the frame-work of the Collimation Task
Force organized to support the work of the second International Linear Collider
Technical Review Committee. The post-linac beam-collimation systems in the
TESLA, JLC/NLC and CLIC linear-collider designs are compared using the same
computer code under the same assumptions. Their performance is quantified in
terms of beam-halo and synchrotron-radiation collimation efficiency. The
performance of the current designs varies across projects, and does not always
meet the original design goals. But these comparisons suggest that achieving the
required performance in a future linear collider is feasible.
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