Quench Heater Technology for HL-LHC Superconducting Accelerator Magnets Article Swipe

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Materials science Magnet Polyimide Large Hadron Collider Superconducting magnet Coating Electromagnetic coil Nuclear engineering Dielectric strength Superconductivity Dielectric Electronic circuit Optoelectronics Electrical engineering Engineering physics Mechanical engineering Composite material Nuclear physics Condensed matter physics Physics Engineering Layer (electronics)

C. Scheuerlein , Rui de Oliveira , Roland Piccin , Florian Meuter , Fabian Glogiewicz , Balduin Katzer , Tobias Thetter ·

YOU? · · 2023 · Open Access · · DOI: https://doi.org/10.1109/tasc.2023.3346837 · OA: W4390204229

Quench heaters for the active protection of superconducting magnets are large flexible circuits that are produced in a photolithographic process. The HL-LHC quench heater base material, the circuit production process and the qualification tests are described. For potential future use as interlayer quench heater, a Cu coating with a Ta diffusion barrier has been developed that can resist the high temperatures needed for coil reaction. The application of a coverlay enables dielectric tests at voltages that approach the specified breakdown strength of the polyimide insulation. Potential further improvements of heater performance and robustness are discussed.