Abstract:
The invention relates to a travelling wave tube configuration with a travelling wave tube (LR) and a linearization circuit arrangement (S). The aim of the invention is to integrate the linearization circuit arrangement (S) and the travelling wave tube (LR) in one unit and to keep the linearization circuit arrangement (S) at a temperature that is safe and lower than that of the wall (W) of the tube or a common wall in order to protect the linearization circuit arrangement while the tube housing is kept at an admissible high temperature. To this end, an active cooling element (K), preferably a Peltier element, is used.
Abstract:
A fluid flow heat exchanger comprising a thermally conductive porous body (21) contacting at least one portion of a part (20) to be cooled. The fluid flows through said porous body (21). The porous body has pores which cause the fluid to change direction and are large enough to minimise head loss as the fluid flows through the porous body (21). Said heat exchanger is particularly useful for electron tubes.
Abstract:
Embodiments of the present disclosure generally provide magnetron configurations that provide more efficient and/or more uniform cooling characteristics and methods for forming the magnetrons. The magnetron includes one or more flow directing structures disposed between parallel cooling fins. The flow directing structures direct air flow across various surfaces of the cooling fins and prevent that otherwise would be obstructed by magnetron components, reducing the incidence and/or magnitude of hot spots on the cooling fins and/or on other magnetron components. The flow directing structures also adjust flow rates to improve cooling efficiency.
Abstract:
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.
Abstract:
An inductive output tube (IOT) operates in a frequency range above 1000 MHz. An output window may be provided to separate a vacuum, portion of the IOT from an atmospheric pressure portion of the IOT, the output window being surrounded by a cooling air manifold, the manifold including an air input port and a plurality of apertures permitting cooling air to move from the port, through the manifold and into the atmospheric pressure portion of the IOT. The output cavity may include a liquid coolant input port; a lower circular coolant channel coupled to receive liquid coolant from the liquid coolant input port; a vertical coolant channel coupled to receive liquid coolant from the lower circular coolant channel; an upper circular coolant channel coupled to receive liquid coolant from the vertical coolant channel; and a liquid coolant exhaust port coupled to receive liquid coolant from the upper circular coolant channel.
Abstract:
A drift tube linear accelerator incorporating an improved drift tube design, wherein the DTL comprises a resonance chamber maintaining a vacuum and having an inlet port and an exit port, an RF field source producing an oscillating radio frequency field within the chamber, and a plurality of substantially cylindrical drift tubes comprising a hollow body having a low energy end and a high energy end and housing a magnet, a low energy end cap attached to the low energy end of the hollow body and a high energy end cap attached to the high energy end of the hollow body, and a stem extending from said hollow body to an inner surface of the resonance chamber. During operation of the drift tube linear accelerator the drift tubes are cooled by a cooling fluid traveling from a cooling fluid reservoir through an inlet passage in the stem to a disbursing channel in the hollow body, through the disbursing channel to a first annular cooling channel, through the first cooling channel to a collecting channel, through the collecting channel to an annular return channel, through the return channel to an outlet passage in the stem, and through the outlet passage to the cooling fluid reservoir.
Abstract:
The invention concerns a circulating fluid heat exchanger for conducting heat exchange with a part (30) and comprising a plurality of channels (33) for transporting the fluid. The channels (33) include a first portion (34) in which the fluid is transported towards a second portion (32) where the fluid contacts the outer surface of said part (30), and a third portion (35) which receives the fluid discharged from the second portion (32). The fluid is transported in a direction transversal to the outer surface of the part (30) in the first and third portions (34, 35). The invention is useful as a cooler for an electron tube.