HTS wiggler concept for a damping ring

TL;DR

This paper proposes a novel HTS wiggler design for damping rings that achieves high magnetic fields with low current densities, offering robustness, cost-effectiveness, and suitability for harsh environments.

Contribution

It introduces a second-generation HTS cabling-based wiggler concept with specific magnetic design parameters for damping rings.

Findings

Achieves ~2T magnetic field within 86 mm gap

Operates reliably at higher heat loads up to LN2 temperatures

Offers reduced failure rate and cost compared to baseline designs

Abstract

Magnetic design proposed for a damping ring (DR) is based on second generation HTS cabling technology applied to the DC windings with a yoke and mu-metal-shimmed pole to achieve ~2T high-quality field within a 86 mm gap and 32-40 cm period. Low levels of current densities (~90-100A/mm2) provide a robust, reliable operation of the wiggler at higher heat loads, up to LN2 temperatures with long leads, enhanced flexibility for the cryostats and infrastructure in harsh radiation environment, and reduced failure rate compared to the baseline SC ILC DR wiggler design at very competitive cost.