Figure 4
From: Additive manufacturing of magnetic shielding and ultra-high vacuum flange for cold atom sensors
Measured shielding factors along the test and control shields longitudinal axes (z axes), under an external magnetic field of 50 μT in the transverse (Y plane) of the shields. The dashed lines show the position of the open ends of the shields, while the solid lines shows the closed ends. (A) Open ended test shield (B) Closed ended test shield (C) Closed ended test shield which underwent HIP treatment. The increase in shielding factor towards the open end of the test shield has been seen in 3D-printed shields that have not received the HIP treatment and therefore is not an effect of the HIP treatment. It is believed that the rise is an caused by edge effects related to the increased amount of material in that region. (D) Comparison of the open ended test shield and the control shield. The inserted image shows the replica mu-metal shield. The mu-metal replica was annealed in pure dry hydrogen under the same conditions as the 3D-printed samples. The maximum magnetic shielding factor measured in the control shield was 568 ± 102.
