Permanent magnets are used in many sorts of devices. They are applied in many electromagnetic transducers – like, for example, electric machines and measurement instruments. Nowadays a new generation of sensors, especially position sensors, are fitted with permanent magnets. Different types of sensors and different working environments require the application of permanent magnets with parameter...

In the summer of 2000, we constructed the four 30-m long straight sections in the SPring-8 Storage Ring. Magnets were rearranged to make long free spaces. New girders were designed, manufactured and installed to the SPring-8 storage ring tunnel. Magnets placed on the girders were aligned on a straight line using CCD camera and laser. A long undulator was installed in one long straight section a...

Preface This document is the Technical Design Report covering the two large spectrometer magnets of the PANDA detector setup. It shows the conceptual design of the magnets and their anticipated performance. It precedes the tender and procurement of the magnets and, hence, is subject to possible modifications arising during this process. The use of registered names, trademarks, etc. in this publ...

An analytical expression is derived for the magnetic field of a two-dimensional periodic circular array of head-to-head permanent magnets, assuming there is either no gap between the magnets or that they are separated by a non-magnetic pole-piece. Some more general symmetry properties are described. The force experienced by the magnets is calculated and an analytical approximation is derived. W...

Lifting capacities greater than 41 N/cm2 (60 psi) at 77 K have been achieved using a combination of permanent magnets and high quality melt-textured YBa,Cu,O,-s (YBCO). The key concept of this hybrid superconducting magnetic bearing (HSMB) is the use of strong magnetic repulsion and attraction from permanent magnets to support high loads in conjunction with flux pinning in a type II superconduc...

Two pairs of superconducting magnets will be inserted into CLEO as part of the CESR/CLEO phase III upgrade. Stray elds from the superconducting magnets will a ect the eld quality of the solenoid in the sensitive region of the CLEO detector. This problem was analyzed in [1]. In addition, the superconducting magnets will be supported by an active, high precision positioning system. Parts of the p...

Ingestion of small foreign bodies is common in children, and usually does not cause any harm to the gastrointestinal tract. But ingestion of multiple magnets can be hazardous because of the strong attraction of the magnets through the bowel wall, which may lead to bowel wall necrosis and perforation. We describe the case of a 6-year-old autistic boy who swallowed 4 magnets which led to bowel ob...

A family of large bending dipoles has been successfully magnetically measured, installed and is operational in the high power IR-FEL. These magnets are unique in that they bend the beam 180 degrees on a 1 meter radius. The optics requirements for the magnets include low fields, large horizontal apertures, tight field homogeneity, high repeatability of core field & integrated field, and control ...

The possibility of increasing the dynamic aperture in high brilliance synchrotron radiation sources by shaping the field of the chromaticity correction sextupoles is discussed. A new type of chromaticity correction magnets (“modified sextupoles”) is proposed, having the property of behaving like sextupoles near the magnetic axis, and more linearly at larger distances. It is shown that a large i...

The ready availability of very strong permanent magnets in the form of rare-earth magnetic alloys such as neodymium-iron-boron has lead to renewed interest in one of the oldest types of electric motors the homopolar motor. The ease with which a demonstration homopolar motor can now be built and operated when neodymium magnets are used is quite remarkable. In this paper two recent types of simpl...