Radial Oscillations of Quark Stars Admixed with Dark Matter

We investigated compact stars consisting of cold quark matter and fermionic dark matter treated as two admixed fluids. We computed the stellar structures and fundamental radial oscillation frequencies of different masses of the dark fermion in the cases of weak and strong self-interacting dark matter. We found that the fundamental frequency can be dramatically modified and, in some cases, stable dark strange planets and dark strangelets with very low masses and radii can be formed.

Radial Kick in High-Efficiency Output Structures

We have developed an analytical approach that predicts radial oscillation near theaperture of a pillbox cavity. In addition, it provides natural criteria for the design of a taperedguiding magnetic field in the output section of a relativistic klystron amplifier, as well as that of atravelling wave tube, in a method that is self-consistent with the dynamics of the electrons.

General spin precession and betatron oscillation in storage rings

Spin precession of particles having both anomalous magnetic and electric dipole moments (EDMs) is considered. We give the generalized expression of spin precession of these particles injected with transversal extent in magnetic storage rings. This is the generalization of the Farley’s pitch correction [F. J. N. Farley, Phys. Lett. B 42, 66 (1972)], including radial oscillation as well as vertical one. The transversal betatron oscillation formulae of these particles are also reproduced.