This is a graph of the equilibrium radius vs ambient pressure.  The blue line represent the Eller-Flynn relationship for dissolve gas concentrations related to ambient pressure, equilbrium radius, and a ratio of time-average of the equilibrium radius and the radius taken to the 1^st (on top) and 4^th (on bottom) powers. The magenta circles represent our operating range.

This is a graph of the intensity vs equilibrium radius.  For a dissolve gas concentration, c_i/c_o = 0.002 (Ar in the solution, the relationship of the intensity and equilibrum radius can be represented by a fourth order polynomial equation.