  In this paper we consider a minimal classically conformal U(1) model of
fermionic dark matter. We calculate the one loop effective potential which
generates the mass scale quantum mechanically via dimensional transmutaion in
the spirit of Gildener and Weinberg, and examine the effects of the new dark
sector on the Standard Model Higgs as well as how the dark fermions receive a
mass and can produce the observed relic abundance. We then consider constraints
on the model coming from collider and direct detection experiments before
calculating the thermal effects on the potential in the early universe. We
examine the nature and conditions for a strongly first order phase transition
in our model and calculate the associated gravitational wave signal and compare
to the sensitivities of current and proposed experiments.
