Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session L10: Tonne Scale Neutrinoless Double Beta Decay R&D V
3:30 PM–5:18 PM,
Sunday, April 14, 2019
Sheraton Room: Governor's Square 12
Sponsoring Units: DNP DPF
Chair: Reina Maruyama, Yale University
Abstract: L10.00006 : Characterization of an Ionization Readout Tile for nEXO*
4:30 PM–4:42 PM
View Presentation Abstract
Michael J Jewell
Michael J Jewell
A new design for the anode of a time projection chamber, consisting of a charge-detecting "tile", is investigated for use in the proposed tonne-scale nEXO experiment to search for neutrinoless double-beta decay. Modular by design, an array of tiles can cover a sizable area. The width of each strip is small compared to the size of the tile, so a Frisch grid is not required. A grid-less, tiled anode design is beneficial for an experiment such as nEXO, where a wire tensioning support structure and Frisch grid might contribute radioactive backgrounds and would have to be designed to accommodate cycling to cryogenic temperatures. A prototype tile was tested in a cell containing liquid xenon. Very good agreement is achieved between the measured ionization spectrum of a 207Bi source and simulations giving an energy resolution comparable to the best intrinsic ionization-only resolution necessary to achieve the expected energy resolution σ/Qββ of 1 %.
*This work has been supported, in the US, by DOE's Office of Nuclear Physics within the Office of Science and the National Science Foundation.
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