Gas discharge tube, light source and liquid chromatograph
A gas discharge tube and gas technology, which is applied in the field of liquid chromatograph, can solve the problems of reduced discharge startability, shortened life of gas discharge tube, easy rise of anode temperature, etc., and achieves the effect of increasing light quantity and realizing discharge startability.
Active Publication Date: 2010-04-21
HAMAMATSU PHOTONICS KK
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Problems solved by technology
However, in this case, the distance between the discharge narrowing hole and the opening edge of the anode part becomes longer, and the discharge startability decreases.
Furthermore, since the area of the anode portion becomes smaller (the ratio of the opening area to the surface of the anode portion becomes larger), the temperature of the anode portion becomes easier to rise.
As a result, there is a problem of accelerating the consumption of the anode part in the conventional gas discharge tube (the life of the gas discharge tube is shortened).
Method used
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[0036] Hereinafter, 17 implementation drawings of the gas discharge tube, light source device and liquid chromatograph of the present invention will be described in detail. In addition, in description of drawings, the same code|symbol is attached|subjected to the same or corresponding part, and repeated description is abbreviate|omitted. Figure 1 ~ Figure 4 Showing an embodiment of the gas discharge tube related to the present invention, Figure 5 ~ Figure 8 express Figure 4 The light-emitting part assembly represented by, Figure 9 and Figure 10 express Figure 4 The positional relationship between the narrow hole for the discharge circuit and the oblong opening is shown. In addition, in the following description, the traveling direction of the emitted light is defined as "front", and terms such as "front", "rear", "front", and "rear" are used to express directions. Regarding "upper" and "lower", A term indicating a direction, etc., means a state in each drawing.
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The present invention relates to a gas discharge tube or the like having a structure for enabling the maintenance of discharge startability and the prevention of the shortening of the life of an anodesection and for increasing the amount of visible light from a visible light source passing through a discharge path restricting section. The gas discharge tube comprises a sealed vessel in which gasisencapsulated. A cathode section and anode section for generating discharge are arranged in the sealed vessel. Furthermore, a discharge path restricting section for narrowing a discharge path is arran ged between the cathode section and the anode section. In particular, an opening portion is formed in the anode section, and the cross section of the opening portion has a non-circular shape where themaximum opening width in a first direction is different from that in a second direction orthogonal to the first direction. Thus, the amount of the visible light passing through the opening portionofthe anode section in the gas discharge tube from the visible light source can be increased by making the maximum opening width in one direction of the first and second directions longer than that in the other direction. The maintenance of the discharge startability and the prevention of the shortening of the life of the anode section can be attained by making the maximum opening width in the otherdirection shorter than that in one direction.
Description
technical field [0001] This invention relates to a gas discharge tube, a light source device, and a liquid chromatograph that generate a discharge for obtaining emitted light in a gas-sealed container. Background technique [0002] For example, a light source device used in a light source such as a liquid chromatograph or a semiconductor inspection device includes at least a gas discharge tube that emits light of a predetermined wavelength, and a gas discharge tube that is arranged on the back side of the gas discharge tube and that emits visible light to the gas discharge tube. visible light source. A gas discharge tube used in such a light source device includes a pair of cathode and anode for generating discharge, and a circular opening through which visible light from a visible light source passes is provided in the anode. The circular opening provided on the anode part is arranged at a position where visible light passing through the circular opening can pass through a...
Claims
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IPC IPC(8): H01J61/68G01N30/74
CPCG01N2030/027H01J61/68H01J61/06G01N30/74
Inventor 伊藤喜延伊藤真城松下孝二
Owner HAMAMATSU PHOTONICS KK