  Recently, first limits on putative Lorentz invariance violation coefficients
in the pure gravity sector were determined by the reanalysis of short-range
gravity experiments. Such experiments search for new physics at sidereal
frequencies. They are not, however, designed to optimize the signal strength of
a Lorentz invariance violation force; in fact the Lorentz violating signal is
suppressed in the planar test mass geometry employed in those experiments. We
describe a short-range torsion pendulum experiment with enhanced sensitivity to
possible Lorentz violating signals. A periodic, striped test mass geometry is
used to augment the signal. Careful arrangement of the phases of the striped
patterns on opposite ends of the pendulum further enhances the signal while
simultaneously suppressing the Newtonian background.
