Journal of the Korean Vacuum Society (한국진공학회지)

The Korean Vacuum Society (한국진공학회)
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Measurement of Optogalvanic Signal in Hollow Cathode Discharge Tube

Hollow cathode discharge tube에서의 광검류 신호 측정

  • 이준회 (충남대학교 물리학과) ;
  • 정기주 (공주대학교 사범대학 물리교육과)
  • Published : 2002.06.01
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Abstract

The optogalvanic signals were measured using hollow cathode discharge tube with argon as buffer gas at change of discharge currents. A change of ionization rate due to electron collision causes an increase or decrease of the electric conductivity, This change in electric conductivity generates the optogalvanic signal. We conclude that optogalvanic signal has close relation with change of the lowest metastable atoms density at low current.

Hollow cathode discharge(HCD)에서 알곤 기체를 완충 기체로 사용하여 전류 변화에 따른 광검류 신호를 측정하였다. 광검류 신호는 방전의 전기 전도도의 증가 또는 감소에 의해 나타나며 전기 전도도의 변화는 전자 충돌에 의한 이온화율의 변화에 의해 일어난다. 낮은 방전 전류에서 광검류 신호는 가장 낮은 준안정 준위 원자의 밀도 변화와 밀접한 관계가 있다는 결론을 얻었다.

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