The intermediate polar RX J1712.6-2414, discovered by Buckley et al. (1995), turned out to have a phasedependent circular polarization of up to −5% in the Ic band, the largest value observed in any intermediate polar. By comparing the slope of the observed polarized flux with theoretical models, Buckley et al. (1995) obtained an estimate of 8 MG for the magnetic field strength. In this fit, onl...

The Very Large Array was used to observe the ultracool rapidly rotating M9 dwarf TVLM 513-46546 simultaneously at 4.88 GHz and 8.44 GHz. The radio emission was determined to be persistent, variable and periodic at both frequencies with a period of ∼ 2 hours. This periodicity is in excellent agreement with the estimated period of rotation of the dwarf based on its v sin i of ∼ 60 km s. This rota...

Cyclotron Radiation Emission Spectroscopy (CRES) is a technique for measuring the kinetic energy of charged particles through precision measurement frequency cyclotron radiation generated by particle's motion in magnetic field. The Project 8 collaboration developing next-generation neutrino mass experiment based on CRES. One approach to use phased antenna array, which surrounds volume tritium g...

The emission of electromagnetic radiation from charged particles spiraling around magnetic fields is an important effect in astrophysical and laboratory plasmas. In theoretical modeling, issues still not fully resolved are, among others, the inclusion of the recoil force on the relativistic electron motion and the detailed computation of the radiation power spectrum. In this paper, the cyclotro...

This report describes preliminary experience writing formal speciications for the control system for a cyclotron and neutron radiation therapy apparatus. This eeort is motivated by high reliability and safety requirements , and a need for concise, authoritative documentation to support coding, user instruction , and testing. Software development practices for therapy machines and physics resera...

Beam instabilities in the strongly magnetized electron-positron plasma of pulsar magnetospheres are considered. We analyze the resonance conditions and estimate the growth rates of the Cherenkov and cyclotron instabilities of the ordinary (O), extraordinary (X) and Alfvén modes in two limiting regimes: kinetic and hydrodynamic. As a preliminary step, we reconsider wave dispersion and polarizati...

A calculation is presented of the radiation pattern of shear Alfv en waves generated by a burst of charged particles in a charge-neutral plasma with two-ions of differing charge-to-mass ratios. The wake pattern is obtained for the inertial and kinetic regimes of wave propagation. Due to the presence of two ion-species, the Alfv en waves propagate within two different frequency bands separated b...

Corrugated waveguide transmission lines are in use to transmit high power mm-wave radiation from gyrotrons to the plasma for electron cyclotron plasma heating in tokamaks such as ITER. The coupling efficiency of the gyrotron output radiation formed as a quasi-Gaussian beam to the waveguide mode is a critical issue. A hyperbolic corrugated horn serves as a converter of the TEM00 Gaussian mode to...