A sensitive Faraday rotation setup using triple modulation

G. Phelps, J. Abney, M. Broering, W. Korsch

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


The utilization of polarized targets in scattering experiments has become a common practice in many major accelerator laboratories. Noble gases are especially suitable for such applications, since they can be easily hyper-polarized using spin exchange or metastable pumping techniques. Polarized helium-3 is a very popular target because it often serves as an effective polarized neutron due to its simple nuclear structure. A favorite cell material to generate and store polarized helium-3 is GE-180, a relatively dense aluminosilicate glass. In this paper, we present a Faraday rotation method, using a new triple modulation technique, where the measurement of the Verdet constants of SF57 flint glass, pyrex glass, and air was tested. The sensitivity obtained shows that this technique may be implemented in future cell wall characterization and thickness measurements. We also discuss the first ever extraction of the Verdet constant of GE-180 glass for four wavelength values of 632 nm, 773 nm, 1500 nm, and 1547 nm, whereupon the expected 1/λ2 dependence was observed.

Original languageEnglish
Article number073107
JournalReview of Scientific Instruments
Issue number7
StatePublished - Jul 2015

Bibliographical note

Publisher Copyright:
© 2015 Author(s).

ASJC Scopus subject areas

  • Instrumentation


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