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Characterization of a free air ionization chamber for low energy X-rays
[摘要] Free air ionization chambers are used by most primary metrology laboratories as primary standards of the quantities air kerma and exposure in X-ray beams. The free air ionization chamber for low energies of the Calibration Laboratory (LCI) of IPEN showed in a characterization test a problem in the set responsible for the variation of its sensitive volume. After a modification in the support of the micrometers used for the movement of the internal cylinder and the establishment of a new alignment system protocol, the tests were redone. The objective of this work was to present the results obtained in the new condition.
[发布日期]  [发布机构] Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN-SP), Av. Professor Lineu Prestes, 2242, São Paulo; SP; 05508-000, Brazil^1
[效力级别]  [学科分类] 
[关键词] Alignment system;Calibration laboratories;Characterization tests;Low energy x rays;Primary metrologies;Primary standards;Sensitive volume;X ray beam [时效性] 
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