  We propose to create a secondary beam of neutral kaons in Hall D at Jefferson
Lab to be used with the GlueX experimental setup for strange hadron
spectroscopy. A flux on the order of 3 x 10^4 KL/s will allow a broad range of
measurements to be made by improving the statistics of previous data obtained
on hydrogen targets by three orders of magnitude. Use of a deuteron target will
provide first measurements on the neutron which is {\it terra incognita}.
  The experiment will measure both differential cross sections and
self-analyzed polarizations of the produced {\Lambda}, {\Sigma}, {\Xi}, and
{\Omega} hyperons using the GlueX detector at the Jefferson Lab Hall D. The
measurements will span c.m. cos{\theta} from -0.95 to 0.95 in the c.m. range
above W = 1490 MeV and up to 3500 MeV. These new GlueX data will greatly
constrain partial-wave analyses and reduce model-dependent uncertainties in the
extraction of strange resonance properties (including pole positions), and
provide a new benchmark for comparisons with QCD-inspired models and lattice
QCD calculations.
  The proposed facility will also have an impact in the strange meson sector by
providing measurements of the final-state K{\pi} system from threshold up to 2
GeV invariant mass to establish and improve on the pole positions and widths of
all K*(K{\pi}) P-wave states as well as for the S-wave scalar meson
{\kappa}(800).
