Geist Brian, Ronningen Reginald, Stolz Andreas, Bollen Georg, Kochergin Vladimir
Appl Opt. 2015 Apr 1;54(10):2866-9. doi: 10.1364/AO.54.002866.
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.
研究了铽镓石榴石（Tb₃Ga₅O₁₂，TGG）用于抗辐射高磁场传感的前景。通过将辐照后的TGG晶体（等效中子剂量6.3×10¹³ n/cm²）的光学和磁光特性与TGG对照样品的特性进行比较，分析了TGG晶体的长期辐射稳定性。还进行了模拟以预测TGG晶体中的辐射损伤机制。观察到在较短波长处辐射诱导的吸光度增加以及法拉第效应的降低，而在波长高于600 nm时未观察到磁光效应的退化。这表明TGG晶体将是用于磁光抗辐射磁场传感器的良好候选材料。
