Now showing items 91-100 of 132
Undulation of a magnetized electron beam by a periodic ion channel
(The American Institute of Physics, 1988-10)
Electron‐beam dynamics are calculated for an electron beam propagating parallel to a uniform magnetic field through a periodic ion density channel. Results show that resonant excitation of transverse electron oscillations ...
The influence of damping on the ion hose instability
(The American Institute of Physics, 1988-07)
The ion hose instability in the ion‐focused regime is analyzed using a rigid beam model with phenomenological damping terms. Values of the instability wavelength, e‐folding length, and group velocity are calculated and ...
Radial oscillations and the ion hose instability of an electron beam propagating in a periodic ion channel
(The American Institute of Physics, 1988-03)
Recently, the propagation of an electron beam through an ion channel with periodically varying ion density has been proposed as a method of transporting or modulating an electron beam. A theoretical treatment indicates ...
Raman scattering by optical phonons in In1−y−zAlyGazAs lattice matched to InP
(The American Institute of Physics, 1988-10-24)
We report on Raman scattering by longitudinal optical phonons in In1−y−zAlyGazAs (1−y−z=0.53) lattice matched to InP. The quaternary alloys were grown on (001) InP by molecular beam epitaxy. The phonon spectra exhibit ...
Electronic properties of pseudomorphic InGaAs/AlGaAs (on GaAs) and InGaAs/InAlAs (on InP) Modfet structures
(Elsevier, 1988)
Pseudomorphic (strained channel) modulation doped field effect transistors (MODFETs) have recently received a considerable amount of attention. These devices provide potential for both improved device performance and new ...
Time‐dependent modeling of resonant‐tunneling diodes from direct solution of the Schrödinger equation
(The American Institute of Physics, 1988-10-01)
Numerical solution of the time‐dependent Schrödinger equation for resonant‐tunneling diodes has been impeded by the difficulty in handling open‐system boundary conditions. This paper presents a boundary condition method ...
Wigner function modeling of resonant tunneling diodes with high peak‐to‐valley ratios
(The American Institute of Physics, 1988-11-15)
Wigner function simulations of structures with experimentally observed high peak‐to‐valley ratios are carried out. It is shown that if care is taken with the numerical method used, the simulations reproduce these sharp ...
Leak widths resulting from plasma diffusion in a magnetic cusp
(Elsevier, 1988-04-18)
Several formulas describing cusp leak widths are derived using different assumptions on the natures of the crossfield diffusion and the plasma flow parallel to the magnetic field.
Analysis of TiN by charged particle beams: Nuclear reaction analysis, nuclear reaction broadening and Rutherford backscattering
(Elsevier, 1988-12-01)
Charged particle beams have been used to extract data both on the composition and also on the thickness of two series of TiNx films (about 5 and 2 [mu]m thick respectively), where x varied from 0.3 to 1.0. The technique ...
Spectral and picosecond temporal properties of flared guide Y‐coupled phase‐locked laser arrays
(The American Institute of Physics, 1988-12-12)
Spatio‐spectral and spatio‐temporal properties of flared waveguide ‘‘Y’’‐coupled laser arrays are investigated in both cw and pulsed operation. In each case, regular sustained self‐pulsations are exhibited. Destabilization ...