Abstract
High capacity pulse tube coolers are presently under development at CEA/SBT. The Development Models of the pulse tube cold finger feature an in-line configuration to ease manufacturing and optimisation of the sizing.
A cooling power of 5.2 W at 80 K has been achieved with 200 W of total electrical power, 128 W PV work, and a rejection temperature of 298 K provided by water cooling. This work has been accomplished using a standard wearing linear compressor operating at a fixed frequency of 50 Hz and equipped with a laser transducer to measure the stroke. An ultimate temperature of 38 K has also been achieved.
Based on these results, a pulse tube cold finger has been developed for cooling down of HTS filters banks for an UMTS RF base station demonstrator (SUPRACOM project). A standard wearing linear compressor from THALES Cryogenics with an adjustable frequency drive electronics has been used. A performance of 7.7 W at 80 K has been achieved with 200 W of total electrical power and with heat rejection at 298 K; the PV work is about 140 W. This last result is presently being used for the design of a coaxial shape pulse tube cooler. This cold finger will be ultimately supplied with a flexure bearing compressor to increase the reliability. The matching of the compressor and the cold head are discussed.
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Charles, I., Duvaland, J.M., Duband, L., Trollier, T., Ravex, A., Martin, J.Y. (2003). High Capacity Pulse Tube Cryocooler. In: Ross, R.G. (eds) Cryocoolers 12. Springer, Boston, MA. https://doi.org/10.1007/0-306-47919-2_19
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DOI: https://doi.org/10.1007/0-306-47919-2_19
Publisher Name: Springer, Boston, MA
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