Tool Chain for Simulations of Bi-Filar Coil Winding for Fast Quench Protection

Conference · Thu Aug 07 00:00:00 EDT 2025 · No journal information

DOI:https://doi.org/10.2172/3019402· OSTI ID:3019402

Jayathilaka, Rehan ^[1]; Zinger, D. ^[1]; Krave, Steven T. ^[2]; Marinozzi, Vittorio ^[2]

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1. Northern Illinois U.
2. Fermilab

The advancement of high-field magnets utilizing high-temperature superconductors (HTS) brings about complex challenges, especially in quench detection and protection. Traditional methods often fall short due to the inherently slow quench propagation in HTS materials. One promising approach to overcome this involves using a bifilar winding configuration, where two conductors are placed side by side. Under normal operation, they function in series, but during a quench event, they switch to an anti-parallel mode. This shift reduces the differential inductance of the coil to near zero, enabling rapid current oscillations through a capacitor discharge. The resulting high-frequency current flow leads to swift, uniform heating, triggering a full-coil quench within microseconds. Moreover, the strong mutual coupling between the two windings significantly reduces electrical noise in voltage measurements. In this work, we explore the viability of this concept by designing, constructing, and testing a REBCO bifilar racetrack coil in liquid nitrogen. We also present a validated simulation model that closely mirrors the coil's dynamic behavior under these conditions, aligning well with experimental observations.

• Research Organization: Northern Illinois U.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: US Department of Energy
• DOE Contract Number: 89243024CSC000002
• OSTI ID: 3019402
• Report Number(s): FERMILAB-POSTER-25-0178-STUDENT-TD; oai:inspirehep.net:2961654
• Resource Type: Conference poster
• Conference Information: Journal Name: No journal information
• Country of Publication: United States
• Language: English