A linear RFQ ion trap for the Enriched Xenon Observatory

Flatt, B.; Green, M. P.; Wodin, J.; DeVoe, R.; Fierlinger, P.; Gratta, G.; LePort, F.; Díez, M. Montero; Neilson, R.; O’Sullivan, K.; Pocar, A.; Waldman, S. J.; Baussan, E.; Breidenbach, M.; Conley, R.; Fairbank, W. M.; Farine, J.; Hall, C.; Hall, K.; Hallman, D.; Hargrove, C. K.; Hauger, M.; Hodgson, John A.; Juget, F.; Leonard, D. S.; Mackay, D.; Martín, Y.; Mong, B.; Odian, A.; Ounalli, L.; Piepke, A.; Prescott, C.Y.; Rowson, P. C.; Skarpaas, K.; Schenker, D.; Sinclair, D.; Strickland, V.; Virtue, C. J.; Vuilleuimier, J.-L.; Wamba, K.; Weber, P.

doi:10.1016/j.nima.2007.05.123

Cited by 22 publications

(14 citation statements)

References 15 publications

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“…The various randomly generated distribution functions [Boltzmann, isotropic, ρ(E, θ)] are created via a Monte Carlo select and reject method [42]. There is a precedent for using a hard sphere model in these types of simulations [19,[43][44][45]. However, when similar systems have been analyzed with a full quantal treatment (e.g., Yb-Yb + ), the differential cross sections have not been found to be isotropic within the temperature regime being considered (10 −3 to 10 3 K) [46].…”

Section: A Na Mot and Linear Rf Paul Trapmentioning

confidence: 99%

“…These custom simulations model experimental work currently underway in our laboratory. Simulations like these have proven vital to the understanding of many Paul trap or hybrid trap experiments [9,16,20,27], where several papers have specifically used the simion software [19,21,22,26,28,29]. Although the simulations presented in this paper model our actual hybrid system, more general conclusions may still be drawn.…”

Section: Introductionmentioning

confidence: 99%

“…A lower bound on the cooled ion's equilibrium temperature is set by the temperature of the neutral buffer gas. Additionally, the technique works best for ions (with mass m I ) and neutral atoms (with mass m n ) whose masses meet the criterion m I /m n > 1, else the ion trap's inherent atom-ion rf heating mechanism can overwhelm the collisional cooling [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Ion–neutral-atom sympathetic cooling in a hybrid linear rf Paul and magneto-optical trap

et al. 2012

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Long range polarization forces between ions and neutral atoms result in large elastic scattering cross sections, e.g., ∼ 10 6 a.u. for Na-Na + or Na-Ca + at cold and ultracold temperatures. This suggests that a hybrid ion-neutral trap should offer a general means for significant sympathetic cooling of atomic or molecular ions. We present simion 7.0 simulation results concerning the advantages and limitations of sympathetic cooling within a hybrid trap apparatus consisting of a linear rf Paul trap concentric with a Na magneto-optical trap (MOT). This paper explores the impact of various heating mechanisms on the hybrid system and how parameters related to the MOT, Paul trap, number of ions, and ion species affect the efficiency of the sympathetic cooling.

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Section: A Na Mot and Linear Rf Paul Trapmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ion–neutral-atom sympathetic cooling in a hybrid linear rf Paul and magneto-optical trap

et al. 2012

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“…This is because no conventional radioactive process can produce a barium ion in bulk xenon. So-called "barium tagging" has been a subject of R&D for at least 20 years [17][18][19][20][21][22], but at the time of writing, a convincing method of barium ion extraction and identification remains elusive.…”

Section: Introductionmentioning

confidence: 99%

Demonstration of Single-Barium-Ion Sensitivity for Neutrinoless Double-Beta Decay Using Single-Molecule Fluorescence Imaging

McDonald¹,

Jones²,

Nygren³

et al. 2018

Phys. Rev. Lett.

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A new method to tag the barium daughter in the double-beta decay of ^{136}Xe is reported. Using the technique of single molecule fluorescent imaging (SMFI), individual barium dication (Ba^{++}) resolution at a transparent scanning surface is demonstrated. A single-step photobleach confirms the single ion interpretation. Individual ions are localized with superresolution (∼2 nm), and detected with a statistical significance of 12.9σ over backgrounds. This lays the foundation for a new and potentially background-free neutrinoless double-beta decay technology, based on SMFI coupled to high pressure xenon gas time projection chambers.

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“…Several efforts have been made among the EXO collaboration to prove the barium tagging concept in gaseous xenon, although a full working system has not been accomplished yet. In 2007, individual Ba ions were trapped and observed by resonance fluorescence with a high signal-to-noise ratio in a gas-filled linear ion trap designed by the EXO collaboration [52,53]. The barium source used for this purpose was chemically produced by heating a barium dispenser loaded with BaAl 4 − N i, and depositing Ba on a Ta foil [53].…”

Section: Current Statusmentioning

confidence: 99%

Ion Extraction and Counting System for Barium Tagging in Gaseous Xenon for the Enriched Xenon Observatory

Martinez¹,

Paula²

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The Enriched Xenon Observatory is an experiment in the search of the neutrinoless double beta decay of 136 Xe. A positive observation and measurement of the decay rate would determine fundamental properties of the neutrinos, such as their nature (Majorana or Dirac) and their absolute mass scale. A liquid xenon time projection chamber is currently operating at the Waste Isolation Pilot Plant (WIPP) in Carlsbad, NM; and a gaseous xenon TPC prototype is in a research and development stage at Carleton University. for the constructive comments. Philippe Gravelle and Yves Baribeau, thank you for the patience and the time spent helping me solve the infinite technical issues I encountered every day. Thanks to my co-workers and friends, Ryan Killick, Etienne Rollin, Vincent Basque, Caio Licciardi, Matt Dunford and Francois Leonard. To all the EXO collaborators I met shifting in New Mexico, thanks for the shared knowledge and for the good times. To my family, the greatest gratitude for the unconditional support, for believing in me, and for filling my life with happiness.ii Contents Abstract i Acknowledgements ii List of Figures viReferences 96

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A linear RFQ ion trap for the Enriched Xenon Observatory

Cited by 22 publications

References 15 publications

Ion–neutral-atom sympathetic cooling in a hybrid linear rf Paul and magneto-optical trap

Ion–neutral-atom sympathetic cooling in a hybrid linear rf Paul and magneto-optical trap

Demonstration of Single-Barium-Ion Sensitivity for Neutrinoless Double-Beta Decay Using Single-Molecule Fluorescence Imaging

Ion Extraction and Counting System for Barium Tagging in Gaseous Xenon for the Enriched Xenon Observatory

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