Centre National De La Recherche Scientifique

Other

Yves Alban-Marie Arnal

Jacques Henri Pelletier

Ana Lacoste

Michel Moisan

Thierry Leon Lagarde

Zenon Zakrzewski

Stéphane Bechu

Thierry L&eacute;on Lagarde

Thierry Léon Lagarde

The invention concerns a source supplying an adjustable energy electron beam, comprising a plasma chamber (P) consisting of an enclosure () having an inner surface of a first value (S) and an extraction gate () having a surface of a second value (S), the gate potential being different from that of the enclosure and adjustable. The invention is characterized in that the plasma is excited and confined in multipolar or multidipolar magnetic structures, the ratio of the second value (S) over the first value (S) being close to: D=1/&#x3b2; &#x221a;2&#x3c0;m/mexp (&#x2212;&#xbd;), wherein: &#x3b2; is the proportion of electrons of the plasma P, mthe electron mass, and mis the mass of positively charged ions.

Source for providing an electron beam of settable power

The method comprises the following steps: The invention is applicable to fabricating micron and sub-micron filters.

Method of producing a sheet comprising through pores and the application thereof in the production of micronic and submicronic filters

The invention relates to a device for the production of a plasma () within a housing comprising means for the generation of energy in the microwave spectrum, for the excitation of the plasma, said means comprise at least one basic plasma excitation device with a coaxial applicator () of microwave energy, one of the ends of which is connected to a production source () of microwave energy, the other end () of which is directed to the gas to be excited within the housing. The device is characterised in that each basic plasma excitation device is arranged in the wall () of the housing, each applicator () having a central core () which is essentially flush with the wall of the housing. The central core and the thickness of the wall () of the housing are separated by a space () coaxial to the central core, said space being totally filled, at least at the end of each applicator, by a dielectric material (), such that said material is essentially flush with the level of the wall of the housing.

Device for production of a plasma sheet

A device of a plasma () for confinement of a plasma within a housing (), comprising creation means for creating a magnetic field, said means being a series of permanent magnets () for creation of a magnetic field presenting an alternating multi-polar magnetic structure to the plasma and the magnets () restrict the plasma to a large volume, the magnets begin distributed in a discontinuous around the volume end said magnets () arc discharge, a distance within the housing at a separation from the walls of the housing by means of support shafts (). The changes above have been provided to improve the clarification of the claim language and claims have been amended to correct a typographical error. Since the changes are minor and are intended merely to improve the legibility of the claims, obtaining authorization from application was not viewed as necessary.

Device for confinement of a plasma within a volume

The invention concerns a system including a microwave generator and a rectangular guide connected with the generator. The system is adapted to operate in fundamental (H ) or transverse electrical (TE ) mode, and associated with means providing a standing wave pattern. The system also includes many power connectors arranged in the guide at zones of maximum amplitude for one of the components of the electromagnetic field for splitting the generator power. The power connectors are adjusted so that the sum of their reduced admittance levels brought to the splitter input formed by the guide is in a single unit and many sources, respectively connected to a connector of the guide, via insulating means ensuring a power transmission of the connector to the source without reflecting towards the connector and a device adapting impedance of each source, located downstream of the insulating means, between the latter and associated source.

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Poisat, France

Yves Alban-Marie Arnal