| Article | |
| Title | MOSFET-based HTS flux pump |
| Author(s) | Jurčo, Róbert (CERN ; Charles U.) ; Vaskuri, Anna (CERN) ; Curé, Benoit (CERN) ; Dudarev, Alexey (CERN) ; Mentink, Matthias (CERN) |
| Publication | 2023 |
| Number of pages | 11 |
| In: | Supercond. Sci. Technol. 36 (2023) 115025 |
| DOI | 10.1088/1361-6668/acfbfc |
| Subject category | Accelerators and Storage Rings |
| Project | CERN-EP-RDET |
| Abstract | We have developed a high-temperature superconducting (HTS) flux pump using high-power metal-oxide-semiconductor field-effect transistors (MOSFETs) for switching. For its primary coil, two commercial transformers are utilized, each consisting of two copper coils wound on a single iron core, which enables changing the load current over primary current ratio (101 or 194) between the primary and secondary coils. Full-wave rectification is achieved with two half-wave secondary circuits, each of them having six HTS one-turn coils to lower the resistance. Each secondary coil is composed out of nickel-reinforced BSCCO tapes, where 12 MOSFETs have been soldered in parallel straight to the tapes and controlled with analog electronics. Secondary coils are clamped to custom-made copper-stabilized HTS current leads. A support structure for keeping the HTS coils in place was 3D-printed using cryogenic-compatible composite material PETG-CF20. Resistances of the two secondary circuits were measured to be 4 and 7 at 77 K with a total critical current of 980 A. We successfully ramped up a 50 µH Conductor on Round Core solenoid at 77 K using our HTS flux pump with 50 Hz AC voltage source. We achieved a maximal load current of 900 A and exceeded the 715 A critical current of the solenoid. During the thermal runaway of the magnet, the increased load voltage limits the maximum load current supplied by the flux pump. |
| Copyright/License | publication: © 2023-2024 The Author(s) (License: CC-BY-4.0) |
Corresponding record in: Inspire
Record created 2023-10-18, last modified 2024-09-11
