Speaker
Description
One important optimization for a successful detection of neutrinoless double-beta decay is the
energy resolution at its Q-value. nEXO is a tonne-scale experiment aiming to search for such a
decay in the isotope Xe-136 using a five tonne single-phase TPC filled with liquid xenon (LXe)
and equipped with scintillation readout capability. A major factor affecting the energy resolution
in LXe is the event-by-event fluctuation of the ionization charge and scintillation light. nEXO
exploits the microscopic anticorrelation between ionization and scintillation in xenon to maximize
the energy resolution.
In a TPC detector, the electron collection efficiency is usually close to one. Conversely, the
collection of photons can vary dramatically depending, along with other factors, on the overall
light-sensitive area of the detector.
The Stanford liquid xenon TPC is a nEXO prototype teststand planning to host the first VUV
large area (~200cm2) SiPM array. The setup firstly aims to study the feasibility of such a system
with dedicated readout electronics and ultimately to investigate how light collection affects the
detector performance.
In this talk, I will report on the status of the assembly of this photodetector array, along with
characterization measurements and comparison with simulation
| Collaboration | nEXO |
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