Abstract
This article presents a quench protection design of a head-only 1.5 T MRI superconducting magnet with bath-cooling in Wuhan National High Magnetic Field Center (WHMFC). The magnet consists of nine coaxial solenoid coils fabricated with NbTi wire with a copper to non-copper ratio of eight. It operates at around 510 A with a total storage energy of 0.59 MJ. A passive quench protection circuit with a heater network is employed to protect the magnet from damage during the quench event. The quench protection circuit consists of a set of diodes and a heater network. The diode assembly is composed of two groups of two diodes connected in series and then reverse-parallel. The heater network is composed of 18 heaters connected in parallel and each coil's surface is glued with two heaters arranged at 0° and 180°, respectively. Different quench scenarios are simulated and analyzed, and the simulation results show that the quench protection circuit can effectively protect this magnet from damage.
| Original language | English |
|---|---|
| Article number | 4700905 |
| Pages (from-to) | 1-5 |
| Number of pages | 5 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 34 |
| Issue number | 5 |
| DOIs | |
| State | Published - 1 Aug 2024 |
Keywords
- Heater network
- MRI
- quench protection
- superconducting magnet
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