An Open Magnet Utilizing Ferro-Refraction Current Magnification

✍ Scribed by Yuly Pulyer; Mirko I. Hrovat

• Book ID: 102597386
• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 114 KB
• Volume: 154
• Category: Article
• ISSN: 1090-7807
• DOI: 10.1006/jmre.2001.2482

✦ Synopsis

Ferro-refraction is the field magnification that is obtained when a current segment is near a high magnetic permeable boundary. It is shown that ferro-refraction may be used in the design of magnets for NMR or MRI to increase the efficiency of these magnets. The field may be modeled analytically with the Biot-Savart law and the inclusion of mirror image currents. Ferro-refraction is particularly useful in the design of monohedral magnets, magnets producing a remote homogeneous region which have the magnetic sources arranged to one side. These magnets have also been called planar magnets. Two designs for a monohedral magnet which produce good agreement between experimental and analytic results are presented.