Precise magnetic fields a r e necessary to achieve high-quality particle beam-transport in the SLAC beam switchyard. A discussion of the methods of magnetic measurements associated with testing and establishing these fields is presented. These measurements and some of the important results obtained a r e described. In order to satisfy the criteria placed on the transport systems each magnet was...

The electric field parallel to the magnetic field, E∥, in nonlinear magnetosonic waves is analytically studied. The theory shows that E∥ can be strong. Then, with use of one-dimensional, fully kinetic, relativistic, electromagnetic, particle simulations and with test particle calculations, the effect of E∥ on particle acceleration in shock waves is examined for three different mechanisms: inces...

The equations for spin evolution of a particle in a storage ring are obtained considering contributions from the tensor electric and magnetic polarizabilities of the particle along with the contributions from spin rotation and birefringence effect in polarized matter of an internal target. Study of the spin rotation and birefringence effects for a particle in a high energy storage ring provides...

We report new methods for the synthesis and efficient manipulation of magnetic hydrogel microparticles. Through the development of a high-pH rinsing scheme, we achieve a simple and flexible synthesis strategy for the generation of geometrically and chemically complex magnetic microgels, eliminating the need for perfusion streams and other features that limit production rates and particle comple...

Recently, we developed a method for calculating the lifetime of the particle in the special situation where there is no potential barrier, as a first step in our efforts to understand the quantum-mechanics of magnetic traps. The toy model that was used in this study was physically unrealistic because the magnetic field did not obey Laplace's equation. Here, we study, both classically and quantu...

For many years one of the basic tenets of plasma physics has been the invariance, or constancy, of the magnetic moment of a charged particle in a magnetic field that varies slowly in time or space. However it is proposed here that this is invalid and that the magnetic moment is not constant: it is a function of the magnetic flux density. It is shown that there are contradictions within the conv...

Quadrupole Magnetic Field-Flow Fractionation (QMgFFF) is a technique for characterization of sub-micrometer magnetic particles based on their retention in the magnetic field from flowing suspensions. Different magnetic field strengths and volumetric flow rates were tested using on-off field application and two commercial nanoparticle preparations that significantly differed in their retention p...