Evaluating Reactor Antineutrino Signals for WATCHMAN

Understand

Increasing the distance from which an antineutrino detector is capable of monitoring the operation of a registered reactor, or discovering a clandestine reactor, strengthens the Non-Proliferation of Nuclear Weapons Treaty.

• This paper presents calculations of reactor antineutrino interactions from quasi-elastic neutrino-proton scattering and elastic neutrino-electron scattering in a water-based detector operated $\gtrsim10$ km from a commercial power reactor.
• It separately calculates signal from the proximal reactor and background from all other registered reactors.
• The main results are differential and integral interaction rates from the quasi-elastic and elastic processes.