Author/Authors :
Dobi، نويسنده , , A. and Hall، نويسنده , , C. and Slutsky، نويسنده , , S. and Yen، نويسنده , , N. and Aharmin، نويسنده , , B. and Auger، نويسنده , , M. and Barbeau، نويسنده , , P.S. and Benitez-Medina، نويسنده , , C. and Breidenbach، نويسنده , , M. and Cleveland، نويسنده , , B. and Conley، نويسنده , , R. and Cook، نويسنده , , J. and Cook، نويسنده , , S. and Counts، نويسنده , , I. and Craddock، نويسنده , , W. and Daniels، نويسنده , , T. and ، نويسنده ,
Abstract :
We describe purity measurements of the natural and enriched xenon stockpiles used by the EXO-200 double beta decay experiment based on a mass spectrometry technique. The sensitivity of the spectrometer is enhanced by several orders of magnitude by the presence of a liquid nitrogen cold trap, and many impurity species of interest can be detected at the level of one part-per-billion or better. We have used the technique to screen the EXO-200 xenon before, during, and after its use in our detector, and these measurements have proven useful. This is the first application of the cold trap mass spectrometry technique to an operating physics experiment.
Keywords :
mass spectrometry , Purity , Xenon , Double beta decay