Abstract:
An ion pump includes an anode, a backing surface having at least one surface structure extending toward the anode and a cathode positioned between the anode and the backing surface and having an opening such that the at least one surface structure is aligned with the opening.
Abstract:
L'invention concerne un écran plat à micropointes comportant une cathode (1) pourvue de zones actives de micropointes (2) d'émission électronique ; une anode (5) cathodoluminescente pourvue, au moins en regard desdites zones actives de micropointes, de zones actives d'éléments luminophores (16) ; une grille principale (3) d'extraction d'électrons émis par les micropointes actives (2) en direction des éléments luminophores (16) ; et, côté cathode (1), au moins une zone sacrificielle de micropointes (2') propre à être adressée, hors de périodes de fonctionnement de l'écran et indépendamment desdites zones actives.
Abstract:
Die Erfindung betrifft eine Orbitron-Pumpe 10 zur Erzeugung von Vakuum in einem zu evakuierenden Raum-Pumpenraum 24 -, mit einer Elektronenquelle 18, mit Mitteln zum Erzeugen eines Feldes, das die Elektronen der Elektronenquelle 18 im Pumpenraum 24 auf eine Kreisbahn zwingt. Die Erfindung zeichnet sich dadurch aus, dass die Elektronenquelle als Feldelektronenquelle 18 ausgebildet ist, die einen kalten Feldelektronen-Emitter 22 und eine Beschleuniger-Elektrode 20 umfasst, welche die aus dem Feldelektronen-Emitter 22 austretenden Elektronen in Richtung auf das Feld beschleunigt, und dass der Abstand zwischen dem Feldelektronen-Emitter 22 und der Beschleuniger-Elektrode 20 kleiner als die mittlere freie Weglänge der Atome des zu evakuierenden Gases - Restgas - in dem Pumpenraum 24 ist.
Abstract:
A plasma pump and method for pumping ions from a first to second region, the pump including a partition member having a through opening defining a plurality of conduits (30); a group of magnets (24) to provide magnetic forces that extend to the conduits; and a plurality of electric potential sources (14) for creating electrostatic fields which accelerate ions from the conduits to the second region.
Abstract:
An exhaust apparatus and a high vacuum pumping unit including such high vacuum device and an auxiliary vacuum pump are disclosed, wherein a high vacuum is achieved in a vacuum vessel such that the gas molecules within the vacuum vessel are ionized and accelerated to be exhausted and, further, in the high vacuum pumping unit, those gas molecules diffused back or desorbed from the vacuum pump are ionized and accelerated to be returned to the vacuum pump.
Abstract:
PROBLEM TO BE SOLVED: To provide a sputter ion pump capable of providing satisfactory pumping speeds even at low pressures, while having limited overall size and weight. SOLUTION: The sputter ion pump 1 has an improved magnet assembly comprising main magnets 9a, 9b disposed on both end parts of the pump cells of an anode, and auxiliary magnets 11; 11', 11" disposed on one side only of the pump cells, whereby the assembly exhibits an asymmetrical configuration. The sputter ion pump with the improved magnet assembly allows for attaining high pumping speeds even at low pressures while size, weight, and manufacturing cost of the pump itself are being suppressed. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PURPOSE: To obtain an ion pump of a high exhaustion efficiency at a low cost by using an aluminum-system metal to make both a pump casing and an anode which are installed and caused to work in a magnetic field and causing the pump casing to work also as a cathode. CONSTITUTION: A pump casing 12 is installed in a magnetic field formed between the N and the S poles of a permanent magnet 11. A high-voltage terminal 13 is attached to one end wall of the casing 12 and the other end wall is provided with a flange 14 connected to a vacuum case such as an accelerator. The casing 12 is made by subjecting an aluminum-system metal to extrusion molding. Heating wires 17 are fixed in grooves 15 formed during the molding and a magnet 11 is fixed to a convex section 16. An anode 18, which is made by joining together a plural number of rolled cylindrical members 18 made of thin aluminum-system metallic films, is supported inside the casing 12 with insulating members 19 and 20 interposed. The casing 12 also serves as a cathode and formed by adding a minute quantity of titanium, zirconium or magnesium to an aluminum-system metallic member. By the means mentioned above, the exhaustion efficiency of the ion pump can be enhanced. COPYRIGHT: (C)1984,JPO&Japio