Abstract

The Spallation Neutron Source (SNS) project is a collaboration among Argonne, Brookhaven, Jefferson, Lawrence Berkeley, Los Alamos and Oak Ridge National Laboratories. The linac, which injects beam into an accumulator ring, is comprised of both normal and superconducting RF (SRF) accelerating structures. Two room-temperature RF structures, a 402.5-MHz drift-tube linac (DTL) and an 805-MHz coupled-cavity linac (CCL), accelerate an H-minus beam from 2.5 MeV to 186 MeV. The SRF linac accelerates the beam to 1 GeV through 81 elliptical, multicell niobium cavities. This paper reviews the linac physics design and its expected beam dynamics performance.

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