Electron source having a material-retaining device
First Claim
1. A vacuum arc electron source comprising a plasma source having an anode and a cathode facing each other such that they produce a plasma after an appropriate voltage difference has been applied between the anode and the cathode, an electron extractor device and a material-retaining device arranged between the extractor device and the plasma source, characterized, in that, the material-retaining device includes, arranged in the electron extraction direction, at least an upstream baffle and a downstream baffle which are both electrically conducting and have apertures arranged, such that when the baffles and are brought to a given potential, the plasma does not extend to downstream of the downstream baffle.
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Accused Products
Abstract
The present invention relates to a vacuum arc electron source having an anode and a cathode facing each other such that they produce a plasma (P) after an appropriate voltage difference has been applied between the anode and the cathode, an electron extractor device (30) and a material-retaining device arranged between the extractor device and the plasma source. According to the invention, the material-retaining device comprises, arranged in the electron extraction direction (F), at least one upstream baffle (10) and a downstream baffle (20) which are each electrically conducting and have apertures (16, 26) arranged in quincunx, such that when the baffles (10, 20) are adjusted a given potential, the plasma (P) does not extend to downstream of the downstream baffle (20).
28 Citations
8 Claims
- 1. A vacuum arc electron source comprising a plasma source having an anode and a cathode facing each other such that they produce a plasma after an appropriate voltage difference has been applied between the anode and the cathode, an electron extractor device and a material-retaining device arranged between the extractor device and the plasma source, characterized, in that, the material-retaining device includes, arranged in the electron extraction direction, at least an upstream baffle and a downstream baffle which are both electrically conducting and have apertures arranged, such that when the baffles and are brought to a given potential, the plasma does not extend to downstream of the downstream baffle.
Specification