Magnetic Probes

MAGNETIC PROBES

Magnetic probes are an instrument for measuring time-varying magnetic field based on the Faraday’s law of induction. Magnetic probes are widely used in many scientific devices, including plasma and fusion experiments. They find their applications also in industrial and commercial settings.

Princeton Fusion Research LLC develops and markets magnetic probes of a novel design. These ceramic-encapsulated probes are highly compact yet rugged, and suitable for use in harsh environment, including simultaneous presence of ultra-high vacuum and high temperature. The probe design is patented.

Princeton Fusion Research LLC makes three-axes (3D) probes, which simultaneously measure magnetic field about a single spatial point in three orthogonal directions. The probe's ability to simultaneously generate 3 measurements is particularly valuable for critical applications, such as error magnetic field detection and determination of complete polarization of MHD modes in plasma physics and fusion research. The probe's coupling area can also be large enough for equilibrium reconstruction applications. These probes have a built-in electrostatic shield for noise reduction.

See the following article for details of the patented probe design: H. Takahashi, S. Sakakibara, Y. Kubota, and H. Yamada, “Magnetic Probe Construction Using Thick-Film Technology,” Review of Scientific Instruments, Vol. 72, No. 8, Pages 3249-3259, August 2001.