Method and apparatus for fine tuning an orifice pulse tube refrigerator

An orifice pulse tube refrigerator having flow resistance, compliance, and inertance components connected to a pulse tube for establishing a phase relationship between oscillating pressure and oscillating velocity in the pulse tube, the improvement comprising:

• a temperature regulating system for heating or cooling a working gas in at least one of the flow resistance and inertance components;
• and
• a temperature control system connected to the temperature regulating system for controlling the temperature of the working gas in the at least one of the flow resistance and inertance components and maintaining a control temperature that is indicative of a desired temporal phase relationship between oscillating pressure and oscillating velocity of the working gas.