Abstract:
A sputter ion pump comprising a metallic pump container (51) containing a cathode (52) and an anode (53) disposed oppositely to each other, and a permanent magnet (57) located between the cathode and the inner surface of the pump container. After the anode, the cathode and a magnetic material are arranged in the pump container, the pump container is magnetized from the outside of the pump container to form a the permanent magnet.
Abstract:
A fluidic device is disclosed, comprising an enclosed passage that is adapted to convey a circulating fluid. The enclosed passage comprises a flow unit having a first electrode and a second electrode offset from the first electrode in a downstream direction of a flow of the circulating fluid. The first electrode is formed as a grid structure and arranged to allow the circulating fluid to flow through the first electrode. The fluidic device may be used for controlling or regulating the flow of the fluid circulating in the enclosed passage, and thereby act as a valve opening, reducing or even closing the passage.
Abstract:
Within an ion pump, accelerated ions leave the center portion of an anode tube due to the anode tube symmetry and the generally symmetrical electric fields present. The apparent symmetry within the anode tube may be altered by making the anode tube longitudinally segmented and applying independent voltages to each segment. The voltages on two adjacent segments may be time varying at different rates to achieve a rasterizing process. In various embodiments, one or more wire internal to the anode structure and having a time-varying electric potential may alter the trajectory of the ions leaving the anode tube, as may the shape of the anode near the ends of the anode tube.
Abstract:
A sputter ion pump (1) has an improved magnet assembly comprising primary magnets (9a, 9b), disposed on opposite ends of the pump cells of an anode, and secondary 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 with reduced size, weight and manufacturing cost of the pump itself.
Abstract:
There is provided a sputter ion pump that it has a simple structure, a size and a weight can be reduced, the magnetic fields in the vicinity of a central axis can be nullified in the both of a radial and axial directions, and ultimate pressure of the pump can be increased. The sputter ion pump comprises a vacuum chamber that includes an inner wall having a cylindrical section where is formed to be rugged in a cross section. The rugged cylindrical section has outer recesses each of which is provided with a permanent magnets each having a same shape and a same characteristic so that a magnetic pole is directed to a same direction. The rugged cylindrical section has also inner recesses each of which is provided with a cylindrical anode electrode member spaced from the vacuum chamber wall. The rugged cylindrical section of the vacuum chamber wall is formed as a cathode electrode. A cylindrical shield member having a peripheral portion provided with evacuating bores is provided coaxially to the permanent magnets and anode electrodes. The permanent magnets and anode electrode members are arranged with equal spacing in a axis symmetrical configuraton.
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:
Apparatus for ionizing gases at very low pressures comprising inner and outer electrodes wherein the inner electrode is substantially circular in cross section and the outer electrode surrounding the inner electrode may be other than a figure of revolution or may be eccentrically positioned with respect to the inner electrode which inner electrode is less in length than two times the length of the surrounding outer electrode and is spaced therefrom a distance which is greater than the diameter of the inner electrode for a distance of not less than two-thirds the length of the surrounding outer electrode.