Performance study of aluminum shielded room for ultra-low-field magnetic resonance imaging based on SQUID: Simulations and experiments

Li Bo^{1, 2, 3}, Dong Hui^{2, 3}, Huang Xiao-Lei^{2, 3, 4}, Qiu Yang^{1, 2, 3}, Tao Quan^{2, 3}, Zhu Jian-Ming^{1, †}

(color online) (a) Schematic diagram of the system. Coils A and B represent the square coil and the circular coil, respectively. The three-axis SQUID magnetometers are placed in the Dewar. The rectangular cylinder is the 1.5 m × 1.5 m × 2.0 m shielded room, and the shaded rectangle is the door. (b) The SQUID chip with a size of 4 mm × 4 mm. The inductance of the SQUID chips is 190 pH. (c) The frame of three-axis magnetometer.