title: A magneto-optic probe for magnetic fluctuation measurements.
abstract: Results from a proof-of-principle experiment are presented that demonstrate it is possible to construct a completely optical, robust, and compact probe capable of spatially resolved measurements of magnetic field fluctuations smaller than 1 G over a frequency range of 1 Hz-8 MHz in a plasma. In contrast to conventional coil probes, the signal strength is independent of fluctuation frequency and the measurement technique is immune to electrostatic pickup. The probe consists of a high Verdet constant crystal, two polarizers, optical fibers, and a photodetector.
authors.affiliation: Department of Physics, West Virginia University, Morgantown, West Virginia 26506, USA.
authors.forename: W S
authors.initials: WS
authors.lastname: Przybysz
authors.forename: J
authors.initials: J
authors.lastname: Ellis
authors.forename: S Chakraborty
authors.initials: SC
authors.lastname: Thakur
authors.forename: A
authors.initials: A
authors.lastname: Hansen
authors.forename: R A
authors.initials: RA
authors.lastname: Hardin
authors.forename: S
authors.initials: S
authors.lastname: Sears
authors.forename: E E
authors.initials: EE
authors.lastname: Scime