Optimization of pick-up coils for weakly damped SQUID gradiometers

Yang Kang^{1, 2, 3}, Wang Jialei^{1, 2, 3}, Kong Xiangyan^{1, 2, 3, †}, Yang Ruihu^{1, 2, 3}, Chen Hua^{1, 2, 3}

(color online) Normalized dipole sensitivity plotted as a function of the gradiometer baseline and radius. The curves projected on the XZ and YZ planes show the detail.