Electron plasma orbits from competing diocotron drifts.
نویسندگان
چکیده
The perpendicular dynamics of a pure electron plasma column are investigated when the plasma spans two Penning-Malmberg traps with noncoinciding axes. The plasma executes noncircular orbits described by competing image-charge electric-field (diocotron) drifts from the two traps. A simple model is presented that predicts a set of nested orbits in agreement with observed plasma trajectories.
منابع مشابه
Diocotron Wave Echoes in a Pure Electron Plasma
Experimental images illustrate spatial Landau damping of an externally launched diocotron mode, and the resulting echo from a second externally launched wave. Filaments at the resonance layer exhibit spiral wind-up during the collisionless damping process, and “unwind” during the echo formation.
متن کاملDiocotron instability of an intense relativistic electron beam in an accelerator.
High current annular electron beam in an accelerator is subject to various instabilities. A general fluid-Maxwell theory of the diocotron instability is developed for an infinitely long and azimuthally symmetric annular electron beam propagating along an external magnetic field. In contrast with the treatment used in the conventional diocotron instability, the assumptions of tenuous electron be...
متن کاملSubharmonic autoresonance of the diocotron mode*
This paper investigates the excitation and control of the driven l51 diocotron mode in a pure electron plasma by adiabatic passage through higher order resonances. The excitation takes place when the driving frequency vd is swept such that its n th harmonic passes through the linear diocotron mode frequency v0 ; vd'v0 /n , n52,3, . . . . Once past the resonant region, the mode enters the autore...
متن کاملExponential growth of an unstable l=1 diocotron mode for a hollow electron column in a warmfluid model
Numerical investigations of a warm-fluid model with an isothermal equation of state for the perpendicular dynamics of an axisymmetric, magnetically confined pure electron plasma predict an exponentially unstable, I= 1, diocotron mode for hollow density profiles. , The unstable mode can be identified with a stable, nonsmooth mode that exists in cold drift models but which is destabilized-by fini...
متن کاملDiocotron and Kelvin mode damping from a flux through the critical layer.
Experiments and theory characterize a novel type of spatial Landau damping, caused by a flux of particles through the wave or rotation resonance (critical) layer. Pure electron plasma experiments demonstrate that a steady flux of particles causes algebraic damping of diocotron mode amplitudes for azimuthal modes m = 1 and m = 2, and a simple model of dynamics in the nonlinear cat's eye clarifie...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 113 2 شماره
صفحات -
تاریخ انتشار 2014