Broadband terahertz spectroscopy at high magnetic field using the 25 Tesla Split Florida-Helix magnet

We describe the development of a novel high magnetic field ultrafast spectrometer that uses the 25 Tesla Split Florida-Helix magnet. This system has a large numerical aperture that permits the free space propagation of ultrafast pulses to a sample in this large external magnetic field. The system has an operating bandwidth that spans 0.3 to 10 THz. We discuss the utility of this novel instrument for nonequilibrium dynamical measurements and stabilization of alternate orders in magnetic active materials.