Title of article
Effects of Nitrogen and Oxygen contaminations in liquid Argon
Author/Authors
Acciarri، نويسنده , , R. and Antonello، نويسنده , , M. and Baibussinov، نويسنده , , B. and Baldo-Ceolin، نويسنده , , Alana M. and Benetti، نويسنده , , P. and Calaprice، نويسنده , , F. and Calligarich، نويسنده , , E. and Cambiaghi، نويسنده , , M. and Canci، نويسنده , , N. and Carbonara، نويسنده , , F. and Cavanna، نويسنده , , F. and Centro، نويسنده , , S. and Cocco، نويسنده , , A.G. and Di Pompeo، نويسنده , , F. and Fiorillo، نويسنده , , G. and Galbiati، نويسنده , , C. and Gallo، نويسنده , , V. De Grandi، نويسنده , , L. and Meng، نويسنده , , G. and Modena، نويسنده , , I. and Montanari، نويسنده , , C. and Palamara، نويسنده , , O. and Pandola، نويسنده , , L. and Pietropaolo، نويسنده , , F. and Raselli، نويسنده , , G.L. and Roncadelli، نويسنده , , M. and Rossella، نويسنده , , M. and Rubbia، نويسنده , , C. and Segreto، نويسنده , , E. and Szelc، نويسنده , , A.M. and Tortorici، نويسنده , , F. and Ventura، نويسنده , , S. and Vignoli، نويسنده , , C.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2009
Pages
4
From page
169
To page
172
Abstract
Two dedicated and distinct tests of the effects of Nitrogen and Oxygen contaminations in liquid Argon (LAr) have been performed within the WArP R&D program. Purpose of the tests is to detect the reduction of the LAr scintillation light emission as a function of the amount of the contaminant injected in the Argon volume. The rate constant of the light quenching process induced by Nitrogen in LAr has been found to be k ( N 2 ) = 0.11 μ s - 1 ppm - 1 (part per million), while the rate constant for Oxygen has been found to be k ′ ( O 2 ) = 0.54 ± 0.03 μ s - 1 ppm - 1 . Direct PMT signals acquisition allowed to extract with high precision the main characteristics of the scintillation light emission in pure and contaminated LAr. In particular, the decreasing behavior in lifetime and relative amplitude of the slow component is found to be appreciable from O (1 ppm) of Nitrogen concentrations and from O (0.1 ppm) of Oxygen concentrations.
Keywords
Dark Matter search , Liquid argon , Scintillation light
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Serial Year
2009
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Record number
2210004
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