20 T portable bipolar magnetic pulser

Area of Science:

• Materials Science
• Condensed Matter Physics
• Electrical Engineering

Background:

• Studying hard magnetic materials necessitates high magnetic fields.
• Reversing magnetic fields is often crucial for material characterization.

Purpose of the Study:

• To develop a portable pulse generator for producing bipolar magnetic fields.
• To demonstrate the system's capability in characterizing magnetic materials.

Main Methods:

• Utilized capacitor banks discharging through thyristors and fast diodes to achieve peak currents of 7 kA.
• Generated bipolar magnetic fields with a 20 T maximum strength and 18 μs pulse width.
• Employed computer-controlled triggering and magnetic measurements via induction coils or Kerr effect with a sampling oscilloscope.

Main Results:

• Successfully generated bipolar magnetic fields up to 20 T.
• The apparatus demonstrated a compact design, weighing less than 2 kg.
• Validated the system's performance by measuring hysteresis loops of Neodymium-Iron-Boron (NdFeB) magnets.

Conclusions:

• The developed portable pulse generator is a viable tool for magnetic field generation and material characterization.
• The system's portability and performance make it suitable for in-situ studies of hard magnetic materials.