High sensitivity Faraday rotation technique for measurements of magnetic fields with immunity to x-ray effects

Intrator, T.; Marshall, B. R.; Clark, David; McCuistan, T.; Anderson, Brian; Broste, B.; Forman, Katherine C.; Taccetti, M.

doi:10.1063/1.1426227

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…1 Magneto-optic probes are routinely used for measurements of very high frequency currents in microwave circuits 7 and a prototype probe based on a ZnSe crystal, with a sensitivity of 40 G, was recently employed in a high magnetic field ͑ϳ10 000 G͒ pulsed plasma experiment. 8 A key result of the pulsed plasma experiment was that the ZnSe electro-optic properties were not altered by the intense x-ray emission associated with the plasma pulse. That probe employed three optical fibers.…”

Section: Introductionmentioning

confidence: 99%

A magneto-optic probe for magnetic fluctuation measurements

Przybysz

Ellis

Thakur

et al. 2009

Review of Scientific Instruments

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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.

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Section: Introductionmentioning

confidence: 99%

A magneto-optic probe for magnetic fluctuation measurements

Przybysz

Ellis

Thakur

et al. 2009

Review of Scientific Instruments

View full text Add to dashboard Cite

show abstract

Magnetic field measurements in low density plasmas using paramagnetic Faraday rotator glass

Clark

Schaeffer

Bondarenko

et al. 2012

Review of Scientific Instruments

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Paramagnetic Faraday rotator glass (rare-earth doped borosilicate) with a high Verdet constant will be used to measure the magnetic field inside of low density Helium plasmas (T(e) ~ 5 eV, T(i) ~ 1 eV) with a density of n ~ 10(12) cm(-3). Linearly polarized light is sent through the glass such that the plane of polarization is rotated by an angle that depends on the strength of the magnetic field in the direction of propagation and the length of the crystal (6 mm). The light is then passed into an analyzer and photo-detector setup to determine the change in polarization angle. This setup can detect magnetic fields up to 5 kG with a resolution of <5 G and a temporal resolution on the order of a nanosecond. The diagnostic will be used to characterize the structure and evolution of laser-driven collisionless shocks in large magnetized plasmas.

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High sensitivity Faraday rotation technique for measurements of magnetic fields with immunity to x-ray effects

Cited by 2 publications

References 8 publications

A magneto-optic probe for magnetic fluctuation measurements

A magneto-optic probe for magnetic fluctuation measurements

Magnetic field measurements in low density plasmas using paramagnetic Faraday rotator glass

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