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June 22, 2020 to July 2, 2020
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Development of laser ablation ion sources for Ba-tagging with nEXO

Not scheduled


Mr Kevin Murray (McGill University) Ms Melissa Medina Peregrina (McGill University)


The nEXO collaboration is pursuing various approaches to Ba-tagging as future upgrades to the nEXO detector. Ba-tagging may allow for the unambiguous identification of a candidate 0nbb event as a true bb decay. One approach is comprised of multiple ion-manipulation devices to transport, trap, and identify ions extracted from a high pressure Xe-gas environment. To characterize the performance of the system, two laser ablation ion sources (LASs) are being developed, that can operate in vacuum and in Xe-gas respectively. Ion bunches produced by laser-ablation of the target surface can be used to characterize ion extraction and identification capabilities of the Ba-tagging system. Both ion sources have been tested in vacuum conditions and ion currents from a target surface were measured. The in-gas LAS is ready to be commissioned at high pressure. The ion sources and their status will be presented.


Laser ablation ions sources are being developed for characterizing the performance of Ba-tagging.

Experiment/Collaboration nEXO

Primary authors

Mr Kevin Murray (McGill University) Ms Melissa Medina Peregrina (McGill University)


Dr Ania Kwiatkowski (TRIUMF) Dr Christopher Chambers (McGill University) Mr Hussain Rasiwala (McGill University) Dr Jens DILLING (TRIUMF) Thomas Brunner (McGill and TRIUMF) Mr Yang Lan (TRIUMF)

Presentation Materials