ION SOURCE FOR MASS SPECTROMETER

To provide a long-life and low-cost ion source for a mass spectrometer that can maintain predetermined sensitivity without providing a power source for grid heating.SOLUTION: The ion source IS for a mass spectrometer according to the present invention, which analyzes a gas component in a test body,...

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Bibliographische Detailangaben
Hauptverfasser:	NAKAJIMA TOYOAKI, TANAKA RYOTA, KUROKAWA YUJIRO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
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Beschreibung
Zusammenfassung:	To provide a long-life and low-cost ion source for a mass spectrometer that can maintain predetermined sensitivity without providing a power source for grid heating.SOLUTION: The ion source IS for a mass spectrometer according to the present invention, which analyzes a gas component in a test body, includes a filament 4 that emits thermoelectrons when energized, and a grid 5 with a cylindrical outline that draws thermoelectrons by a potential difference with the filament 4, and the grid 5 is made of a material whose thermal conductivity at 300K is 173 W/(m K) or more.SELECTED DRAWING: Figure 1 【課題】グリッド加熱用の電源等を備えることなく、所定の感度を維持し得る高寿命かつ低コストの質量分析計用のイオン源を提供する。【解決手段】試験体内のガス成分を分析する、本発明の質量分析計用のイオン源ＩＳは、通電により熱電子を放出するフィラメント４と、このフィラメント４との電位差で熱電子を引き込む、筒状の輪郭を持つグリッド５とを備え、グリッド５は、３００Ｋでの熱伝導率が１７３Ｗ／（ｍ・Ｋ）以上となる材料で構成されている。【選択図】図１