Electric lamp and discharge devices – With positive or negative ion acceleration
Patent
1984-12-06
1986-12-23
Moore, David K.
Electric lamp and discharge devices
With positive or negative ion acceleration
31511171, 31511181, H05H 0000
Patent
active
046314385
ABSTRACT:
Multicharged ion source with several electron cyclotron resonance zones. The source comprises a sealed enclosure containing a gas for forming a plasma confined in said enclosure, means for producing a high frequency electromagnetic field within the enclosure, means for producing within the enclosure a group of radial and axial, local magnetic fields and defining equimagnetic surfaces permitting the confinement of the plasma on one of these surfaces, the electron cyclotron resonance condition being satisfied, the group having an axis of symmetry, means for extracting the ions through the orifice made in the wall of the enclosure and located on the axis of symmetry and means for reducing, outside the volume occupied by the plasma, the amplitude of the local axial magnetic fields in the vicinity of and slightly upstream of the extraction orifice in n zones located outside the axis, so that new ionizing electron cyclotron resonances appear in these zones.
REFERENCES:
patent: 3665245 (1972-05-01), Schwartz
patent: 4223246 (1980-09-01), Osepchuck
patent: 4393333 (1983-07-01), Sakudo et al.
patent: 4409520 (1983-10-01), Koike et al.
patent: 4417178 (1983-11-01), Geller et al.
patent: 4507588 (1985-03-01), Asmussen et al.
IEEE Transactions on Nuclear Science, col. NS-26, No. 2, Apr. 1979, pp. 2120-2126, New York (USA); R. Geller: "Electron cyclotron resonance (E.C.R.) multiply charged ion sources". *Figure 7a*
IEEE Transactions on Nuclear Science, col. NS-26, No. 3, Jun. 1979, pp. 3680-3682, New York (USA); V. Bechtold et al.: "An ECR-type light ion source for the Karlsruhe isochronous cyclotron". *Figure 3*
Commissariat a l''Energie Atomique
Moore David K.
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