Thermal Acoustic Oscillations: Short Review and Countermeasures

Thermally driven oscillations in capillaries of helium cryogenic systems could be observed when a local heat source occurs or a continuous cold to warm temperature transition along capillary exists. These oscillations could lead to a significant heat flux as well as for pressure disturbances. Therefore, it is practically important to design cryogenic systems robust against possible disturbances due to Thermal Acoustic Oscillations (TAO). In the present paper, a short review on available theoretical and experimental results related to the TAO is given. Some tips for a design as well as in-situ countermeasures are discussed.