Pumping Characteristics of Zr-V-Fe Nonevaporable Getter In Mixture of H_2 and CO Gases

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概要

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• The effect of impure gases on the vacuum performance of a Zr-V-Fe nonevaporable getter (NEG) module were investigated using a gas mixture composed of 80% H<SUB>2</SUB> and 20% CO to simulate a practical vacuum environment. Pumping speeds for H<SUB>2</SUB> and CO in the mixture were measured simultaneously and continuously with two quadrupole mass analyzers in a standard test dome. The pumping speed for H<SUB>2</SUB> was strongly influenced by CO molecules absorbed on the surface of the NEG, while that of CO was nearly independent of H<SUB>2</SUB> absorbed in the NEG. The H<SUB>2</SUB> pumping speed in the mixture with CO was changed very steeply, similarly to that of CO.<BR>It is expected that the results of the mixed gas experiment will be utilized to devise a proper operation schedules of the NEG pumps installed in the SPring-8 storage ring.

• 日本真空協会の論文
• 1994-01-20

著者

• Be S

  Korea Res. Inst. Standards And Sci. Taejon Kor

• In S

  Korea Atomic Energy Research Institute

• IN Sang

  Korea Atomic Energy Research Institute

• BE Suck

  RIKEN

関連論文

• Pumping Characteristics of Zr-V-Fe Nonevaporable Getter In Mixture of H_2 and CO Gases
• Performance Characteristics of Lumped Nonevaporable Getter (NEG) Pump

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