Magnetics Business & Technology - Spring 2012 - (Page 9)

By Cathleen laMBertson • CoMsol, inC. CASE STUDY Designing New Magnet Technology - A Multiphysics Challenge Since 1995, Advanced Magnet Lab (AML) has provided technology for the design and manufacture of advanced coils, magnets and magnet systems for the energy, medical, defense and research industries. The company’s 3D coil-design software and automated construction processes enable rapid deployment of complex state-of-the-art magnets. Recently, AML developed a new magnet topology, Direct Double- Helix (DDH) magnets, which allow for a significant increase in power density, performance in field generation and field quality. The unique characteristics of the DDH magnets, part of the Double- Helix (DH) magnet family invented by AML’s founder, Dr. Rainer Meinke, could lead to more affordable systems and potentially portable devices. The magnets have a large number of applications including high-speed generators and charged particle beam optics. AML’s customers include the Department of Energy, NASA, the European Organization for Nuclear Research (CERN), Center for Advanced Power Systems (CAPS), National High Magnetic Field Laboratory (NHMFL) and GE Medical Systems. The Technology Figure 1. Two-layer multipole DDH magnet. Unlike conventional magnets based on saddle or racetrack coil configurations, AML’s processes and designs enable magnets of any multipole fields with unmatched field homogeneity. Specifically, the DH and DDH magnets are composed of modulated tilted helices (Figure 1) that produce magnetic fields with very pure multipole content. However, while DH magnets are based on very accurate positioning of wire in machined grooves, DDH technology enables the design and manufacturing of magnet coils in one step without conventional conductor and winding processes. “DDH magnets are created in-situ and conducting paths are machined directly out of a resistive object such as a conductive cylinder. The machined grooves serve as electrical insulation and follow a mathematical equation leading to non-uniform cross section of the conductive paths,” said Dr. Philippe Masson, a SeArticle continues on pAge 10 Spring 2012 • Magnetics Business & Technology 9

Table of Contents for the Digital Edition of Magnetics Business & Technology - Spring 2012

Magnetics Business & Technology - Spring 2012
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Designing New Magnet Technology - A Multiphysics Challenge
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Magnetics Business & Technology - Spring 2012