Development of 4 tesla permanent magnet

Abstract

Strong model dipole permanent magnetic for various kinds of accelerator applications is under development at NIRS. Field strength exceeding 4 Telsa in the magnet gap is achieved by an extended Halbach type magnet configuration. The field level is by more than factor of three stronger than a residual field of the material. This will open a new application to an accelerator of various kinds, from a very compact and large scale hadron collider magnet of easy to operate accelerator without power supply.

Progress in Low Field Benchtop NMR Spectroscopy in Chemical and Biochemical Analysis

“…14 15 16 NMR/MRI analysis has been widely applied to the study of materials and their interfaces [40]. More 17 recently, however, the availability and relatively low cost of LF benchtop instruments has led to a 18 plethora of applications in this field [13]. These include studies of rubber [3], nanoparticles [41], and 19 porous materials [42], with relaxation studies of solid-state materials and metal-organic frameworks 20 (MOFs) able to explore the pore-space of MOFs, and the determination of adsorption characteristics 21 [43].…”

“…22 LF NMR has been applied to the quantification of differences between varieties of styrene-butadiene 23 rubber. Individual components in the system, which differed between sites of origin, were detectable 24 with a benchtop instrument, on which 108 samples were analysed in 1 H and 13 C NMR experiments 25 performed on a 1.0 T instrument. Partial Least squares (PLS) regression allowed for a quality control 26 (QC) methodology to be developed for rubber varieties and their origins, and/or relative qualities.…”

An Experiment and Detection Scheme for Cavity-Based Light Cold Dark Matter Particle Searches

“…Halbach array magnets have been around since their introduction in particle accelerators for last one or two decades and have already made their way into Nuclear Magnetic Resonance (NMR) spectrometers and Magnetic Resonance Imaging (MRI) systems. Production of concentrated fields from 4.0T [20] to about 28.0T [21] have been made possible with such magnets.…”

Metamaterial anisotropic flux concentrators and magnetic arrays

“…[26][27][28] Consider, e.g., a p ¼ 1 Halbach for which the reverse component of the magnetic field can exceed the intrinsic coercivity in regions around the inner equator, 20,29 as discussed previously. Using a combined Halbach cylinder and magnetic lens efficiently resolves this problem, as the Halbach cylinder in which the generated field does not exceed the coercivity can be used, and the magnetic lens can increase the field to the desired value, even though this is higher than the coercivity of the permanent magnets.…”