Pulse-tube cryorefrigeration apparatus using an integrated buffer volume

An integrated pressure oscillation controller and buffer volume housing for a cryorefrigerator of the kind having at least one cooling tube, a oscillation controller coupled to a cooling gas supply and exhaust to generate an oscillating compression-expansion cycle, at least one reservoir to contain an expanding cryogen gas, at least one orifice for the movement and phasing of the gas to and from the reservoir, and a regenerator for absorbing heat temporarily and reversibly, comprising:

• an integrated pressure oscillation controller and buffer volume housing coupled to the at least one cooling tube, the regenerator, and the cooling gas supply and exhaust, comprising a body having a chamber therein containing the pressure oscillation controller and at least one other chamber forming the at least one reservoir.

A two-stage cryorefrigeration apparatus of the kind having a first cooling stage and a second cooling stage, said first cooling stage having a first stage temperature which is higher than a second stage temperature of said second cooling stage;

• each of the first cooling stage and second cooling stage comprising a cooling tube, regenerator and heat sink;
• an oscillation controller coupled to a cooling gas supply and exhaust to generate an oscillating compression-expansion cycle, at least one reservoir to contain an expanding cryogen gas, at least one orifice for the movement and phasing of the gas to and from the reservoir, the apparatus comprising:
• and integrated pressure oscillation controller and buffer volume housing coupled to the first cooling stage, the second cooling stage, and the cooling gas supply and exhaust, comprising a body having a chamber therein containing the pressure oscillation controller and at least one other chamber forming the at least one reservoir.

A three-stage cryorefrigeration apparatus, of the kind having a first cooling stage, a second cooling stage, and a third cooling stage, said first cooling stage having a first stage temperature which is higher than a second stage temperature of said second cooling stage and said third stage having a third stage temperature which is lower than the second stage temperature;

• each of the first cooling stage, second cooling stage and third cooling stage comprising a cooling tube, regenerator and heat sink;
• an oscillation controller coupled to a cooling gas supply and exhaust to generate an oscillating compression-expansion cycle, at least one reservoir to contain an expanding cryogen gas, at least one orifice for the movement and phasing of the gas to and from the reservoir, the apparatus comprising:
• an integrated pressure oscillation controller and buffer volume housing coupled to the first cooling stage, the second cooling stage, the third cooling stage, and the cooling gas supply and exhaust, comprising a body having a chamber therein containing the pressure oscillation controller and at least one other chamber forming the at least one reservoir.