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Design of an Ogive-Shaped Beamstop

机译:一种O形形梁止挡的设计

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This paper addresses the evolution, design, and development of a novel approach211u001efor stopping cw (continuous-wave), non-rastered proton beams. Capturing the beam 211u001ein vacuo within a long, axisymmetric surface of revolution has the advantages of 211u001espreading the deposited energy over a large area while minimizing prompt neutron 211u001ebackstreaming and reducing shield size and mass. Evolving from a cylinder/cone 211u001econcept, the ogive shape avoids abrupt changes in geometry that produce sharp 211u001ethermal transitions, allowing the beam energy to be deposited gracefully along 211u001eits surface. Thermal management at modest temperature levels is provided with a 211u001esimple, one-pass countercurrent forced-convection water passage outside the 211u001eogive. Hydrophone boiling sensors provide overtemperature protection. The concept 211u001ehas been demonstrated under beam conditions in the CRITS (Chalk River Injector 211u001eTest Stand) facility.

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