Ion-optics system for a source of ions to be discharged into a g

Details Ion-optics system for a source of ions to be discharged into a g Ion-optics system for a source of ions to be discharged into a g

1994-04-12

1995-08-22

Berman, Jack I.

Radiant energy

Ion generation

Field ionization type

3133601, 3133631, H01J 2702

Patent

active

054442583

ABSTRACT:
The present invention provides an ion-optics system for a source of ions for discharge into gases, the system comprising a screen grid (1) and an accelerator grid (2) constituted by respective frames (3, 4) and respective systems of parallel wires (5, 6) fixed to the frames by means of springs (21), the frames of the grids being assembled to each other via insulators (7) to which they are fixed, the system being provided with a displacement device (9) for adjusting the wires in each of the grids, which device comprising rolls (11) disposed transversely relative to the wires in each grid and offering guide elements (12) in which the wires are placed, the rolls being installed on the frames of the grids with the facility of rotating about their own axes and of changing position in three dimensions together with the wires. Preferably, in a first embodiment, each roll is mounted by means of a length of shaft that is hinged to the frame and by means of an opposite length of shaft installed in an eccentric sleeve mounted in the frame with the option of rotating about its axis. In another embodiment, each roll installed via its lengths of shaft in eccentric sleeves disposed in the frame with the possibility of rotating about their axes, one of the lengths of shaft of each roll being hinged to its eccentric sleeve.

REFERENCES:
patent: 3096456 (1963-07-01), Shelton et al.
patent: 3457405 (1966-10-01), Del Vecchio
patent: 3922578 (1975-11-01), Wilson
"Thermal and Structural Analysis of the LBL 10.times.40 CM Long Pulse Accelerator and the 12.times.48 CM Common Long Pulse Accelerator for TFTR Doublet III-D, and MFTF-B", R. P. Wells, Fusion Engineering, 11th Symposium Proceedings, vol. 1, Nov. 22, 1985, Austin Texas, pp. 160-165.
"Minimum Hole Size in Ion Optics", H. R. Kaufman, J. Spacecraft and Rockets, vol. 22, No. 3, Jun. 1985, pp. 381-382.

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