Design, construction, and performance of a magnetically shielded room for a neutron spin echo spectrometer

The spin-echo spectrometer at the Spallation Neutron Source (SNS)

“…The need to access also higher momentum transfers is satisfied by a variable moderator detector distance allowing for an extension of the scattering angle range. Furthermore the vicinity of other instruments that will use magnetic fields, the iron target block and the crane and other magnetic sources triggered the decision to install a unique magnetic shield around the instrument space [8].…”

“…Details on its layout and performance can be found in Ref. [8]. The magnetic shielding largely contributes to the phase stability of the instrument and the shape of phase scans as is shown in Section 5.1.…”

Computational Modeling and Optimization of a Magnetic Shielding Cabinet

“…Particularly, magnetic fields at DC and low frequency, caused by permanent magnets, communication lines and even by earth field, can significantly affect the performance of highly sensitive devices [18,19]. Consequently, it is necessary to provide a protection mechanism to these devices, by shielding them either actively or passively [19][20][21]. Passive magnetic shielding is based on certain materials, such as high permeable alloys that create a bypass of the magnetic field lines, providing a low-reluctance path.…”