Pulse tube cryocooler with self-cancellation of cold stage vibration
  We experimentally demonstrated a new method for reducing the vibration of the cold stage of a cryocooler. Comparing the RMS amplitude with the case of no phase shift of the driving gas pressure between the two pairs, the longitudinal vibration of the cold stage was reduced by 96.1% at 126 K by supplying gas pressure with 180 degrees of phase shift. 
T. Suzuki, T. Tomaru, T. Haruyama, N. Sato, A. Yamamoto, T. Shintomi,   Y. Ikushima and R. Li