The Selena Neutrino Experiment

2 Sep 2021, 17:10
Talk in parallel session Neutrino physics and astrophysics Discussion Panel Neutrinos 8


Alvaro E Chavarria (University of Washington)


Imaging sensors made from an ionization target layer of amorphous selenium (aSe) coupled to a silicon complementary metal-oxide-semiconductor (CMOS) active pixel array for charge readout are a promising technology for neutrino physics. The high spatial resolution in a solid-state target provides unparalleled rejection of backgrounds from natural radioactivity in the search for neutrinoless 𝛽𝛽 decay and for solar neutrino spectroscopy with $^{82}$Se. We present results on the ionization response of aSe measured from the photoabsorption of 122keV 𝛾 rays in a single-pixel device, and report on the progress in the fabrication and testing of the first prototype imaging sensors based on the Topmetal-II pixelated CMOS charge readout chip. We explore the scientific reach of a large neutrino detector with the proposed technology based on our experimental understanding of the sensor performance.

Reference to paper (DOI or arXiv) arXiv:2012.04079

Primary author

Alvaro E Chavarria (University of Washington)


Mr. Alexander Piers (University of Washington) Cristiano Galbiati (Princeton University) Mr. Harry Ni (University of Washington) Dr. Xinran Li (Lawrence Berkeley National Laboratory) Dr. Yuan Mei (Lawrence Berkeley National Laboratory)

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