Results 251 to 260 of about 313,740 (293)

A Penning trap with radial magnetic field

Hyperfine Interactions, 2007
A radial inhomogeneous magnetic field produced by counter-propagating currents in anti-Helmholtz configuration coils has been superimposed to a Penning trap. The confinement properties of electrons in such a trap have been studied experimentally. Without the radial B-field we find a number of operating conditions where instabilities occur, arising from
Carmen Angelescu, Guenter Werth
openaire   +1 more source

Motion in radial magnetic fields

Journal of Mathematical Physics, 1973
We study the problem of the motion of a charged particle in radial magnetic induction fields of the type B = h(θ)r/r3. A Coulomb electric field is also added. The mechanics of Newton, Einstein, Schrödinger, and Dirac are successively considered in view of exact solutions. The analogies between the four treatments are emphasized.
openaire   +1 more source

The Radial Variation of the Earth's Magnetic Field

Proceedings of the Physical Society, 1948
It is shown that Core and Distributed theories of the Earth's Magnetic Field predict different variations of field intensity with depth. Whereas on core theories both the horizontal and vertical intensities increase with depth according to an inverse cube law, on a distributed theory such as the one recently put forward by Blackett we find, with ...
S K Runcorn, S Chapman
openaire   +1 more source

Interplanetary magnetic field power spectra: Mean field radial or perpendicular to radial

Journal of Geophysical Research, 1976
A detailed frequency analysis of Pioneer-6 interplanetary magnetic field data is carried out for 5 to 15 hour periods during which the mean interplanetary field is approximately radial or perpendicular to radial. The reason why these data sets were chosen is that by making the usual assumption that the phase speed of any wave present is much less than ...
James W. Sari, George C. Valley
openaire   +1 more source

Radial transport with perturbed magnetic field

Physics of Plasmas, 2015
It is pointed out that the viscosity coefficient describing radial transport of toroidal angular momentum is proportional to the second power of the gyro-radius—like the corresponding coefficients for particle and heat transport—regardless of any geometrical symmetry.
openaire   +1 more source

Magnetic Field and Radial Velocity Variations of a Centauri

Publications of the Astronomical Society of the Pacific, 1974
Zeeman spectroscopic observations of the helium variable a Cen suggest that a magnetic field, varying between + 1000 and - 1000 gauss, is present in this star. Magnetic maximum coincides in phase with helium minimum. The radial velocity variations of the lines of He I are consistent with the hypothesis that the helium/hydrogen ratio varies over the ...
Sidney C. Wolff, Nancy D. Morrison
openaire   +1 more source

Magnetogasdynamic circular jet in a radial magnetic field

Il Nuovo Cimento B Series 11, 1985
The effects of compressibility and variable radial magnetic field on a laminar circular jet of an electrically conducting fluid are studied. By taking the Prandtl number of the fluid as unity, series solutions for the velocity distribution, in terms of the magnetic interaction and compressibility parameters, are obtained.
J. J. Mishra, J. L. Bansal
openaire   +1 more source

Perturbation of the radial and non-radial oscillations of a star by a magnetic field

Astrophysics and Space Science, 1972
A generalization of the perturbation method is applied to the problem of the radial and the non-radial oscillations of a gaseous star which is distorted by a magnetic field. An expression is derived for the perturbation of the oscillation frequencies due to the presence of a weak magnetic field when the equilibrium configuration is a spheroid.
openaire   +1 more source

Radial magnetic field in vacuum arc centrifuges

Journal of Physics D: Applied Physics, 1997
According to theory, a radial component of magnetic field in the driving region of a vacuum arc centrifuge should increase the force and the angular velocity. Experiments with different magnetic field configurations of a vacuum arc centrifuge have been carried out. Langmuir probe measurements have been made as well as cross-correlation measurements of
R S Dallaqua, S W Simpson, E Del Bosco
openaire   +1 more source

On Alfvén waves in a radial flow and magnetic field

Journal of Plasma Physics, 1999
This paper considers Alfvén waves in a radially stratified medium where all background quantities, namely mass density, magnetic field strength and mean flow velocity, depend only on the distance from the centre, the latter two being assumed to lie in the radial direction.
L. M. B. C. CAMPOS, N. L. ISAEVA
openaire   +1 more source