  Powerful new multi-kiloton liquid scintillator neutrino detectors, including
NOvA and LENA, will come on-line within the next decade. When these are coupled
with a modest-power decay-at-rest (DAR) neutrino source at short-baseline,
these detectors can decisively address the recent ambiguous signals for
neutrino oscillations at high Delta m^2. These detectors are > 50 m long, and
so with a DAR beam, the characteristic oscillation wave will be apparent over
the length of the detector, providing a powerful verification of the
oscillation phenomena. LENA can simultaneously perform numubar to nuebar
appearance and nue to nue disappearance searches with unprecedented
sensitivity. NOvA is likely limited to nue disappearance given its present
design, but also has excellent sensitivity in the high Delta m^2 region. For
the appearance channel, LENA could provide a stringent test of the LSND and
MiniBooNE signal regions at > 5 sigma with a reduced fiducial volume of 5 kt
and a 10 kW neutrino source. In addition, the LENA and NOvA disappearance
sensitivities in nue mode are complementary to the recent reactor anomaly
indicating possible nuebar disappearance and would cover this possible
oscillation signal at the 3 sigma level.
