  An understanding of the confinement mechanism in QCD requires a detailed
mapping of the spectrum of hybrid mesons. Understanding confinement means
understanding the role of gluons and it is in hybrid mesons that the gluonic
degrees of freedom are manifest. High statistics searches for such states with
pion and p beams have resulted in some tantalizing signals. There is good
reason to expect beams of photons to yield hybrid mesons with J^{PC} quantum
numbers not possible within the conventional picture of mesons as qqbar bound
states. Meager data currently exist on the photoproduction of light quark
mesons. At Jefferson Lab in Newport News, VA plans are underway to upgrade the
energy of the electron accelerator to 12 GeV. Along with this energy upgrade, a
hermetic detector housed in new experimental hall (Hall D) will be used to
collect data on photoproduced mesons with unprecedented statistics. With 12 GeV
electrons, a 9 GeV linearly polarized photon beam will be produced using the
coherent bremsstrahlung technique.
