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TUPME001 |
Heat Load, Stress and Reaction Force Studies of a Polarized Positron Production Target for the Future International Linear Collider |
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- F. Staufenbiel, S. Riemann
DESY Zeuthen, Zeuthen, Germany
- G.A. Moortgat-Pick, A. Ushakov
University of Hamburg, Hamburg, Germany
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The International Linear Collider requires an intense polarized positron beam with yields of about 1014 positrons per second. A polarized positron beam can be produced with a helical undulator passed by the accelerated electron beam to create a high power polarized photon beam. The photon beam penetrates a thin titanium-alloy rotating target wheel of 1m diameter with 500 to 2000 rpm rotation speed and produces polarized positrons. The system should run for 1-2 years without failure. A break down can occur due to the huge heat load in a short time (<1ms). The target design must keep the resulting thermo-mechanical stress below the yield strength and the fatigue limit of the material. FEM ANSYS simulations are used to evaluate the thermo-mechanical stress as well as the vibrations at the bearings of the rotating system. Results are presented with the goal to optimize the target wheel design parameters for a long lifetime.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-TUPME001
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