Microwave frequency structure for microwave tube with...

H - Electricity – 01 – J

Patent

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H01J 23/00 (2006.01) H01J 23/087 (2006.01)

Patent

CA 2709453

The invention relates to a microwave frequency structure for microwave tube comprising a cylindrical vacuum jacket (60) and a device for containing an electron beam in the axis of revolution ZZ' of the cylindrical jacket. The containing device comprises at least two rows R1, R2 ...., Rp, each of n containing permanent magnets, each row being aligned either side of and equidistant to the beam-containment axis ZZ', the n containing permanent magnets e1, e2, ...ei,..en, i being an integer between 1 and n, n being greater than or equal to three, being of parallelepipedal shapes and having a magnetic polarization parallel to one of its edges in a plane transversal to the axis ZZ', their direction of magnetization in the row changing alternately from one containing magnet ei to another next containing magnet ei+1, or preceding containing magnet ei-1, to create an alternating periodic magnetic field along the containment axis ZZ'. Applications: microwave frequency tubes, helix or coupled-cavity TWT, klystrons.

L'invention concerne une structure hyperfréquences pour tube micro- ondes comportant une enveloppe cylindrique sous vide (60) et un dispositif de confinement d'un faisceau d'électrons dans l'axe de révolution ZZ' de l'enveloppe cylindrique, Le dispositif de confinement comporte au moins deux rangées R1, R2...., Rp, de n aimants permanents de confinement chacune, chaque rangée étant alignée de part et d'autre et à égale distance de l'axe de confinement ZZ' du faisceau, les n aimants permanents de confinement e1, e2,...ei,..en, i étant un nombre entier compris entre 1 et n, n étant supérieur ou égal à trois, étant de formes parallélépipédiques et ayant une polarisation magnétique parallèle à une des ses arêtes dans un plan transverse à l'axe ZZ', leur sens d'aimantation dans la rangée, changeant alternativement d'un aimant de confinement ei à un autre suivant ei+1, ou précèdent ei-1, pour créer un champ magnétique périodique alterné le long de l'axe de confinement ZZ'. Applications : tubes hyperfréquences, TOP à hélice ou à cavités couplées, klystrons.

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