title: Radiation stability of visible and near-infrared optical and magneto-optical properties of terbium gallium garnet crystals.
abstract: Perspectives of terbium gallium garnet, Tb₃Ga₅O₁₂ (TGG), for the use of radiation-resistant high magnetic field sensing are studied. Long-term radiation stability of the TGG crystals was analyzed by comparing the optical and magneto-optical properties of a radiation-exposed TGG crystal (equivalent neutron dose 6.3×10¹³ n/cm²) to the properties of TGG control samples. Simulations were also performed to predict radiation damage mechanisms in the TGG crystal. Radiation-induced increase in the absorbance at shorter wavelengths was observed as well as a reduction in the Faraday effect while no degradation of magneto-optical effect was observed when at wavelengths above 600 nm. This suggests that TGG crystal would be a good candidate for use in magneto-optical radiation-resistant magnetic field sensors.
authors.forename: Brian
authors.initials: B
authors.lastname: Geist
authors.forename: Reginald
authors.initials: R
authors.lastname: Ronningen
authors.forename: Andreas
authors.initials: A
authors.lastname: Stolz
authors.forename: Georg
authors.initials: G
authors.lastname: Bollen
authors.forename: Vladimir
authors.initials: V
authors.lastname: Kochergin