Optimization of an e 3 SPreSSO Energy-Extraction System for High-Field Superconducting Magnets

Janne Ruuskanen*, Antti Stenvall, Jeroen Van Nugteren, Valtteri Lahtinen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)


High-temperature superconducting magnets (HTS) suffer from slow quench propagation and have in large fraction high thermal margin. Due to the high thermal margin, quench protection systems (QPS) based on initiating large normal zones, with, e.g., quench protection heaters or CLIQ, are not effective with HTS, and energy extraction is needed. In large magnets, energy extraction with a single dump is not effective and new solutions are looked for. Recently, a concept E 3SPreSSO for HTS magnet protection has been presented in the scope of European project EuCARD-2. E 3 SPreSSO utilizes a series-connected bifilar HTS or LTS coil. In this work, we present a methodology to design QPS based on E 3 SPreSSO for HTS magnets. Then, we utilize this methodology to design and analyze the suitability of such QPS for a 20 T HTS accelerator dipole.

Original languageEnglish
Article number8260874
JournalIEEE Transactions on Applied Superconductivity
Issue number3
Publication statusPublished - 1 Apr 2018
MoE publication typeA1 Journal article-refereed


  • Accelerator magnets
  • HTS cables
  • modeling
  • quench protection


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