Published September 1981 | Version v1
Journal article Metadata-only

A compact quadrupole ion filter for helium detection

Creators

  • 1. Sao Paulo Univ. (Brazil). Inst. Astronomico e Geofisico
  • 2. Rice Univ., Houston, TX (USA)

Description

A compact quadrupole ion filter was conceived and constructed for optimum performance at the mass four region of the mass spectra. It was primarely designed for geological applications in the measurements of helium of soil-gases. The whole ion filter structure is 15 cm long by 3.5 cm diameter, including ion source and collecting plate. The sensitivity to helium is of the order of 10-2 A.torr-1 measured at a total pressure of 6x10-6 torr and resolution 6. The system can be easily adapted to work as a dynamic residual gas analyser for other purposes. (Author)

Abstract (Portuguese)

Um filtro de ions quadrupolar foi projetado e construido para desempenho otimo na regiao de massa quatro do espectro de massas. Esse instrumento foi inicialmente planejado para aplicacoes geologicas na medida do conteudo de helio da fase gasosa dos solos. A estrutura basica do filtro mede 15 cm de comprimento por 3.5 cm de diametro, incluindo a fonte dos ions e a placa coletora. A sensibilidade para o helio e da ordem de 10-2 A.torr-1, medida a uma pressao total de 6x10-6 torr e resolucao 6. O instrumento pode ser facilmente adaptado para operar como analisador dinamico de gases residuais em outras aplicacoes. (Autor)

Additional details

Publishing Information

Journal Title
Rev. Bras. Fis.
Journal Volume
11
Journal Issue
3
Series
Rev. Bras. Fis.
Journal Page Range
519-532
ISSN
0374-4922

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
14788558
Subject category
S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
ELECTROMAGNETIC FILTERS; EXPERIMENTAL DATA; FABRICATION; HELIUM; MASS SPECTRA; MASS SPECTROSCOPY; SPECIFICATIONS
Descriptors DEC
DATA; ELEMENTS; FILTERS; INFORMATION; NONMETALS; NUMERICAL DATA; RARE GASES; SPECTRA; SPECTROSCOPY