1. Thompson, P.S., Ackermann, R.A., and Hedeen, R.A., “A Two-Stage Pulse Tube Cryocooled MRI Magnet,” to be published in Advances in Cryogenic Engineering.
2. Gao, J.L., “IGC-APD Advanced Two-stage Pulse Tube Cryocooler,” to be published in Advances in Cryogenic Engineering.
3. Zhu, S.W., Ichikawa, M., Nogawa, M., and Inoue, T., “Two-stage 4 K Pulse Tube Refrigerator,” Cryocooler 11, Kluwer Academic/Plenum Publishers, New York (2001), pp. 243–247.
4. Zhou, S.L., Thummes, G., and Matsubara, Y., “Experimental Investigation of Loss Mechanism in a 4 K Pulse Tube,” Advances in Cryogenic Engineering, Vol. 45, Kluwer Academic/Plenum Publishers, New York (2000), pp. 81–88.
5. Xu, M.Y., De Waele, A.T.A.M., and Ju, Y.L., “A Pulse Tube Refrigerator Below 2K,” Cryogenics, Vol.39 (1999), pp. 865–869.