  The experimental reconstruction of the Higgs self-energy potential is
essential to a verification of the Higgs boson's role in spontaneous
electroweak symmetry breaking. The first step towards this goal, the
measurement of the triple Higgs self-coupling, can possibly be accomplished at
the next generation of linear colliders. Here we present a background study of
the most promising channel, double Higgs-strahlung off a Z boson, e+e- -> HHZ,
with the subsequent decay H -> b bbar, and evaluate the feasibility of its
measurement.
