Please read these instructions before posting any event on Fermilab Indico

Indico will be unavailable due to server patching on Wed , June 19th, 7 a.m. to 7:30 a.m. Central Time

June 22, 2020 to July 2, 2020
US/Central timezone

Detector Stability in NEOS-phase2

Not scheduled


Dr Young Ju Ko (Institute for Basic Science)


Regarding anomalies in the rate of reactor antineutrinos, NEOS-phase1 tested the existence of sterile neutrino, one of the most prominent candidate, but no strong evidence of the sterile neutrino within the detector sensitivity. The phase2 started to figure out the anomaly in the shape of a reactor antineutrino energy spectrum, called 5-MeV excess, and aims to take about 600-days data including whole burn-up cycle. In phase2, which is about three times longer than phase1, the detector stability emerged as a more significant issue as it was found that the light output continues to drop since installation. This is likely to have the significant impact on the analysis in terms of energy resolution. In this presentation, we report on the stability of the detector as well as the effect of the continuous increase in energy resolution on the analysis.


The stability of the NEOS detector in phase2 and its effect on the analysis

Experiment/Collaboration NEOS Collaboration

Primary author

Dr Young Ju Ko (Institute for Basic Science)

Presentation materials