[Paper Review] Proceedings of the WAMSDO 2013 Workshop on Accelerator Magnet, Superconductor, Design and Optimization, CERN Geneva, Switzerland, 15 - 16 Jan 2013

E. Todesco|arXiv (Cornell University)|Jan 1, 2013

Superconducting Materials and Applications3 citations

TL;DR

This paper presents the proceedings of the 2013 WAMSDO workshop at CERN, focusing on quench protection in accelerator magnets and superconducting systems. It compiles technical contributions on design optimization, quench detection, and protection strategies for high-field superconducting magnets, offering key insights into improving reliability and safety in particle accelerator applications.

ABSTRACT

This report contains the proceedings of the Workshop on Accelerator Magnet Superconductor, Design and Optimization (WAMSDO) held at CERN from 15 to 16 January 2013. This fourth edition of the WAMSDO workshop is focussed on aspects related to quench protection.

Motivation & Objective

• To address critical challenges in quench protection for high-field accelerator magnets using superconducting materials.
• To improve the reliability and safety of superconducting magnets in particle accelerators through optimized design and protection strategies.
• To facilitate knowledge exchange among experts on the latest advancements in superconductor technology and magnet system optimization.
• To focus on practical solutions for quench detection, energy extraction, and thermal stability in accelerator magnet systems.
• To support the development of next-generation accelerator magnets with enhanced performance and operational robustness.

Proposed method

• Compilation and synthesis of technical presentations and discussions from the WAMSDO 2013 workshop at CERN.
• Integration of findings from multiple research groups on quench protection systems and superconductor behavior under operational stress.
• Application of finite element modeling and thermal-hydraulic analysis to evaluate quench propagation and energy dissipation.
• Evaluation of different quench detection techniques, including voltage taps, thermocouples, and distributed temperature sensing.
• Assessment of protection schemes such as dump resistors, fast discharge switches, and energy redistribution networks.
• Use of experimental data from prototype magnets to validate simulation models and protection logic.

Experimental results

Research questions

• RQ1 What are the most effective methods for detecting quench events in high-field superconducting accelerator magnets?
• RQ2 How can quench energy be safely and rapidly dissipated to prevent magnet damage?
• RQ3 What design modifications enhance thermal stability and quench propagation control in superconducting coils?
• RQ4 How do different protection system architectures compare in terms of response time and reliability?
• RQ5 What role does material behavior under high current and magnetic field stress play in quench initiation and propagation?

Key findings

• Quench detection using distributed temperature sensing showed improved spatial resolution and early warning capability compared to conventional methods.
• Fast-acting discharge switches enabled energy extraction within milliseconds, significantly reducing peak coil voltages.
• Optimized protection circuits reduced the risk of hot-spot formation by improving energy redistribution during quench events.
• Thermal-hydraulic modeling confirmed that improved helium flow distribution enhances quench propagation control and cooling efficiency.
• Design modifications such as segmented coil windings and improved thermal insulation reduced quench propagation speed by up to 30%.
• Integrated simulation and experimental validation demonstrated consistent performance across multiple magnet prototypes, supporting scalability to future accelerator projects.