Shielding Engineering Progress for the QTT Buildings

The proposed Qi Tai 110m radio Telescope (QTT) is a fully steerable single-dish radio telescope with an observing frequency coverage from 150 MHz to 115 GHz. The QTT will play an important role for fundamental research fields of radio astronomy, such as pulsars, molecular spectral lines, active galactic nuclei, and VLBI observations [1]. In order to mitigate the potential interference in the buildings at the QTT site, a low-cost shielding scheme is proposed for the buildings, to mitigate medium and low level RFIs. The measured shielding effectiveness shows that the scheme achieves our design goal.