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High-permeability DC magnetic shielding design

IP.com Disclosure Number: IPCOM000250591D
Publication Date: 2017-Aug-04
Document File: 1 page(s) / 206K

Publishing Venue

The IP.com Prior Art Database

Related People

Svenja Knappe: INVENTOR [+4]

Abstract

We describe a high permeability DC magnetic shielding design which consists of two half sections that can close around a subject similar to a clam shell design. The two sections can be hinged at the sides or can revolve around each other. When closed, both halves are in intimate contact with each other to enable high shielding factors. The shield can be cylindrical, octagonal, or elliptical and can be single layer or multi-layer.

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QuSpin Inc. August 4th, 21017

High-permeability DC magnetic shielding design Svenja Knappe, Orang Alem, Jeramy Hughes, Vishal Shah

Biomagnetic signals emitted naturally from the human body are several orders of magnitude smaller than environmental interference. Therefore, biomagnetic recordings are in most cases performed in magnetically shielded environments, such as high-permeability DC magnetic shielding. We describe high-permeability DC magnetic shielding designs that allow for easy access. The most common designs for recordings of human subjects are magnetically-shielded rooms (MSRs) with access doors or cylindrical shield cans with removable end caps. Here, we introduce a design for a human-size shield that surrounds a part of the human body, which consists of two clam shells, such as the one shown in Figure 1. In this case, the shells consist of two nested half- cylinders. They open to allow access for the subject. The subject lies on the bed in the center of the half cylinders. The top shell closes around the subject and generates a magnetically-shielded environment. This environment can be used for biomagnetic measurements of the heart for example. The two shells could be hinged at the side with a loaded spring or counterweight to enable easy and safe opening and closing. Alternatively, the half- cylinders could revolve around each other, for example, such that the top lids slide between the bottom lid...