The Korean Physical Society 06130 22, Teheran-ro 7-gil, Gangnam-gu, Seoul, Republic of Korea 610 Representation : Tae Won NOH TEL: 02-556-4737 FAX: 02-554-1643 E-mail : Copyright(C) KPS, All rights reserved.
30 May 2022 to 4 June 2022
Virtual Seoul
Asia/Seoul timezone

A Capillary Probe for Ion Extraction from Liquid Xenon

Not scheduled
Virtual Seoul

Virtual Seoul

Poster Neutrinoless double beta decay Poster


Double beta decay is a process whereby two neutrons simultaneously decay into protons, emitting two electrons. The 100 kg scale EXO-200 precisely measured these decays with the emission of two neutrinos ($^{136}$Xe $2\nu\beta\beta$), with a half-life to be $2.165 \pm 0.016(stat) \pm 0.059 (syst) \times 10^{21}$ years. If the neutrino is a Majorana fermion, double beta decays are also possible without the emission of any neutrinos. EXO-200 placed one of the most stringent lower limits on the $^{136}$Xe $0\nu\beta\beta$ decay half-life at $3.5 \times 10^{25}$ years. Multi-ton detectors like the 5t nEXO are planned with $\sim100$ times greater reach. nEXO's projected half-life sensitivity is $1.35 \times 10^{28}$ years. This is accomplished by stringent control of all sources of background, along with taking advantage of the rich energy and topological information and the exquisite self-shielding of a large time projection chamber (TPC) with scintillation light readout.

Future upgraded detectors could also observe the $^{136}$Ba ions resulting from $^{136}$Xe double beta decays (so-named barium tagging) and eliminate all background signals other than the $2\nu\beta\beta$ decay. The high efficiency detection of a single ion following a double beta decay event in a potentially multi-ton detector medium is a challenging task. One proposed scheme is to extract $^{136}$Ba ions by flowing xenon through a small capillary for transport to subsequent stages of detection. Progress at Carleton University on the development of a capillary-based probe for individual ion extraction from liquid xenon will be presented, along with details of the experimental apparatus and the simulations of each step of the extraction.

Collaboration nEXO Collaboration

Primary author

Robert Collister (Carleton University)


Ryan Elmansali (Carleton University) Razvan Gornea (Carleton University) Thomas Koffas (Carleton University)

Presentation Materials