A xenon gas purity monitor for EXO
/ Authors
A. Dobi, C. Hall, S. Herrin, A. Odian, C. Prescott, P. Rowson, N. Ackerman, B. Aharmin, M. Auger, P. Barbeau
and 49 more authors
K. Barry, C. Benitez-Medina, M. Breidenbach, S. Cook, I. Counts, T. Daniels, R. DeVoe, M. Dolinski, K. Donato, W. Fairbank, J. Farine, G. Giroux, R. Gornea, K. Graham, G. Gratta, M. Green, C. Hagemann, K. Hall, D. Hallman, C. Hargrove, A. Karelin, L. Kaufman, A. Kuchenkov, Nicolas Produit, J. Lacey, D. Leonard, F. Leport, D. Mackay, R. MacLellan, B. Mong, M. M. Diez, A. Müller, R. Neilson, E. Niner, K. O'Sullivan, A. Piepke, A. Pocar, K. Pushkin, E. Rollin, D. Sinclair, S. Slutsky, V. Stekhanov, K. Twelker, N. Voskanian, J. Vuilleumier, U. Wichoski, J. Wodin, Liang Yang, Y. Yen
/ Abstract
We discuss the design, operation, and calibration of two versions of a xenon gas purity monitor (GPM) developed for the EXO double beta decay program. The devices are sensitive to concentrations of oxygen well below 1 ppb at an ambient gas pressure of one atmosphere or more. The theory of operation of the GPM is discussed along with the interactions of oxygen and other impurities with the GPM’s tungsten filament. Lab tests and experiences in commissioning the EXO-200 double beta decay experiment are described.
Journal: Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment