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An electrostatic deceleration lens for highly charged ions
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View: Figures


Image of FIG. 1.
FIG. 1.

Deceleration of a divergent beam from initial energy of to final energy of to (as simulated using SIMION).

Image of FIG. 2.
FIG. 2.

Equipotential surfaces for deceleration of a parallel beam from initial energy of to final energy of . The surfaces between the first two electrodes correspond to equipotentials of 1–21 kV spaced 1 kV apart and subsequent surfaces are spaced by 300 V each. The experimental chamber is at 29.995 kV (as simulated using SIMION).

Image of FIG. 3.
FIG. 3.

The variation in energy along the length of the deceleration lens.

Image of FIG. 4.
FIG. 4.

Beam acceptance as obtained using SIMION simulations for a beam having initial energy of and final energy of .

Image of FIG. 5.
FIG. 5.

Cutout view of the mechanical design of the deceleration lens (as simulated using SOLIDWORKS).

Image of FIG. 6.
FIG. 6.

Schematic of the beamline of the PKDELIS ECRIS.

Image of FIG. 7.
FIG. 7.

Cross-sectional view of the RPA. The metal electrodes (A, B, C, and D) are isolated using ceramic spacers (E and F).

Image of FIG. 8.
FIG. 8.

Simulated RPA spectrum for an ion beam of initial energy decelerated to .

Image of FIG. 9.
FIG. 9.

Current (triangles) and energy (circles) spectrum for as a function of retarding voltage on the RPA. The initial energy of the beam is 70 keV and the final energy after deceleration is 1290 eV.


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Scitation: An electrostatic deceleration lens for highly charged ions