Abstract
It is shown that a cw electromagnetic wiggler can be constructed from chilled high-purity copper that is capable of delivering higher magnetic field strengths and vector potential, a w, than either permanent magnet or superconducting wigglers. A model calculation with a 90 MeV beam lasing at 1.7 μm showed a 20% higher a rnw than a superconducting system, giving a 23% shorter wiggler period and 16% higher efficiency. Experimental measurements of magnetoresistive effects in copper are included in this paper.
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