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Conceptual design of International Linear Collider damping ring wiggler based on a hybrid technology
1DULY Research Inc., 302 Fifth St., San Pedro, California 90731, USA.
Abstract:
A magnetic design of a failure-free damping ring wiggler with 100% duty factor, 55.6 mm gap, and field exceeding 1.6 T is proposed. The insertion device is based on permanent magnets and specially shimmed poles that capable to meet the requirements of the International Linear Collider (ILC) damping rings (including positron one), with field quality and gap comparable to that projected for ILC using superconducting wiggler. Performance improvement of the modified hybrid design is attained due to yoke reduction down to six separated strips and maximized packaging of the midgrade (or high-grade) parallelepiped magnet blocks surrounding the Permendur poles. Economical efficiency is demonstrated on the base of calculated amount of magnetic material. A cryogenic variant of the hybrid design may certainly provide good sustainability to harsh radiation environment and further enhancement of the design efficiency within the state of the art.
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