Observations of collective ion acceleration with drifting intense relativistic electron beams
- 1 May 1976
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 47 (5), 1897-1908
- https://doi.org/10.1063/1.322909
Abstract
In this paper we report several observations related to the acceleration of positive ions when an intense relativistic electron beam is injected into a low‐pressure neutral gas. In addition to varying the type and pressure of the neutral gas, we have varied a number of geometrical parameters including the radius of both the beam and the guide tube, the length of the guide tube (endplate effects), and dielectric constant of the guide tube. We find that ion acceleration occurs only if the peak electron‐beam current I0 exceeds the space‐charge‐limiting current, Il0, for the cavity. Maximum average ion energies are obtained when I0/Il0≳3: the ion (proton) energy spectrum is rather broad with the spectrum peak occurring at 3/2Ee, and the maximum energy cutoff at approximately 3Ee, where Ee is the electron‐beam kinetic energy.Keywords
This publication has 20 references indexed in Scilit:
- Theory of ion acceleration by drifting intense relativistic electron beams. II. Comparison with experimentsPhysics of Fluids, 1975
- Theory of ion acceleration by drifting intense relativistic electron beams. I. TheoryPhysics of Fluids, 1975
- Dependence of ion acceleration on limiting current in relativistic electron beamsApplied Physics Letters, 1974
- Further Studies of Collective Acceleration of Positive Particles Using Intense Electron BeamsIEEE Transactions on Nuclear Science, 1973
- Ion Acceleration in Electron BeamsIEEE Transactions on Nuclear Science, 1973
- Production and Acceleration of Ions by Intense Relativistic Electron BeamsIEEE Transactions on Nuclear Science, 1972
- Dynamics of Pulsed High Current Relativistic Electron BeamsIEEE Transactions on Nuclear Science, 1971
- Particle Acceleration and Intense Electron-Beam Front VelocitiesPhysical Review Letters, 1970
- Charged-Particle Acceleration by Intense Electron StreamsPhysical Review Letters, 1970
- Observation of Energetic Ions from a Beam-Generated PlasmaJournal of Applied Physics, 1970