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College Park, Maryland      June 6 - 10 , 2004

T1-D3 (9:00 AM): The Fundamental Neutron Physics Beamline at the Spallation Neutron Source

G. L. Greene (University of Tennessee; Oak Ridge National Laboratory), T.V. Cianciolo (Oak Ridge National Laboratory), W.M. Snow (Indiana University), P. Huffman (National Institute of Standards and Technology; North Carolina State University), J. D. Bowman, M. Cooper (Los Alamos National Laboratory), J. Doyle (Harvard University)

The Spallation Neutron Source (SNS), currently under construction at Oak Ridge National Laboratory with an anticipated start-up in early 2006, will provide the most intense pulsed beams of cold neutrons in the would. At a projected power of 1.4 MW, the time averaged fluxes and fluences of the SNS will approach those of high flux reactors. One of the flight paths on the cold, coupled moderator will be devoted to fundamental neutron physics. The fundamental neutron physics beamline is anticipated to include two beamlines; a broad band “cold” beam, and a monochromatic beam of 8.9 Å neutrons for ultra cold neutron experiments. The fundamental neutron physics beamline will be operated as a user facility with experiment selection based on a peer reviewed proposal process. An initial program of five experiments in neutron decay, hadronic weak interaction and time reversal symmetry violation have been proposed. A description of the proposed facility will be given and project status will be reviewed.

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