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Online ²²²Rn removal by cryogenic distillation in the XENON100 experiment

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arxiv 1702.06942 v2 pith:TDCIWY6K submitted 2017-02-22 physics.ins-det

Online ²²²Rn removal by cryogenic distillation in the XENON100 experiment

XENON Collaboration: E. Aprile , J. Aalbers , F. Agostini , M. Alfonsi , F. D. Amaro , M. Anthony , F. Arneodo , P. Barrow
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L. Baudis B. Bauermeister M. L. Benabderrahmane T. Berger P. A. Breur A. Brown E. Brown S. Bruenner G. Bruno R. Budnik L. B\"utikofer J. Calv\'en J. M. R. Cardoso M. Cervantes D. Cichon D. Coderre A. P. Colijn J. Conrad J. P. Cussonneau M. P. Decowski P. de Perio P. Di Gangi A. Di Giovanni S. Diglio E. Duchovni G. Eurin J. Fei A. D. Ferella A. Fieguth D. Franco W. Fulgione A. Gallo Rosso M. Galloway F. Gao M. Garbini C. Geis L. W. Goetzke L. Grandi Z. Greene C. Grignon C. Hasterok E. Hogenbirk R. Itay B. Kaminsky G. Kessler A. Kish H. Landsman R. F. Lang D. Lellouch L. Levinson M. Le Calloch Q. Lin S. Lindemann M. Lindner J. A. M. Lopes A. Manfredini I. Maris T. Marrod\'an Undagoitia J. Masbou F. V. Massoli D. Masson D. Mayani Y. Meng M. Messina K. Micheneau B. Miguez A. Molinario M. Murra J. Naganoma K. Ni U. Oberlack S. E. A. Orrigo P. Pakarha B. Pelssers R. Persiani F. Piastra J. Pienaar M.-C. Piro V. Pizzella G. Plante N. Priel L. Rauch S. Reichard C. Reuter A. Rizzo S. Rosendahl N. Rupp R. Saldanha J. M. F. dos Santos G. Sartorelli M. Scheibelhut S. Schindler J. Schreiner M. Schumann L. Scotto Lavina M. Selvi P. Shagin E. Shockley M. Silva H. Simgen M. v. Sivers A. Stein D. Thers A. Tiseni G. Trinchero C. Tunnell N. Upole H. Wang Y. Wei C. Weinheimer J. Wulf J. Ye Y. Zhang I. Cristescu
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classification physics.ins-det
keywords distillationradoncolumnxenon100cryogenicdetectoremanationloop
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We describe the purification of xenon from traces of the radioactive noble gas radon using a cryogenic distillation column. The distillation column is integrated into the gas purification loop of the XENON100 detector for online radon removal. This enabled us to significantly reduce the constant $^{222}$Rn background originating from radon emanation. After inserting an auxiliary $^{222}$Rn emanation source in the gas loop, we determined a radon reduction factor of R > 27 (95% C.L.) for the distillation column by monitoring the $^{222}$Rn activity concentration inside the XENON100 detector.

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