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High energy negative ion generation by Coulomb implosion mechanism
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Electron density distribution at for the case of . All electrons are removed from the cluster. (b) Electron density distribution for the case of weak laser intensity , which corresponds to the calculation of Sec. III B.

Image of FIG. 2.
FIG. 2.

Radial density profiles of (a) protons and (b) negative hydrogen ions during the Coulomb explosion and implosion. The densities are normalized on the critical density.

Image of FIG. 3.
FIG. 3.

(a) Distribution of the radial component of electric field at , which is normalized on the laser electric field . A profile along the horizontal line passing is shown in lower part. (b) Trajectories of ions.

Image of FIG. 4.
FIG. 4.

Phase planes of the positive [in (a) and (c)] and negative [in (b) and (d)] ions. The rows (a,b) and (c,d) correspond to the time and , respectively.

Image of FIG. 5.
FIG. 5.

Time history of the energy spectra of (a) protons and (b) ions.

Image of FIG. 6.
FIG. 6.

Negative ion energy dependence on the initial coordinate.

Image of FIG. 7.
FIG. 7.

Time history of the energy spectra of (a) protons and (b) ions for the case of .

Image of FIG. 8.
FIG. 8.

Spatial distribution of (a) ion density and (b) transverse electric field at . Phase plane of positive/negative ions at in [(c) and (d)] and in [(e) and (f)].

Image of FIG. 9.
FIG. 9.

Energy spectra of proton and negative ions accelerated from plasma channel via Coulomb explosion/implosion mechanism.

Image of FIG. 10.
FIG. 10.

Electron density distribution for ion acceleration with magnetic dipole vortex.

Image of FIG. 11.
FIG. 11.

Phase plot for (a) positive and (b) negative ions. Phase plot for (c) positive and (d) negative ions. Momentum distribution for (e) positive and (f) negative ions. The momentum is normalized by and all figures are taken at .

Image of FIG. 12.
FIG. 12.

Energy spectra of accelerated ions from multicomponent plasmas which is composed of and He.

Image of FIG. 13.
FIG. 13.

(a) Schematic of the experimental setup. (b) Ion traces recorded on CR-39 with the Thomson parabola.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: High energy negative ion generation by Coulomb implosion mechanism