摘要
A novel 4 K separate two-stage pulse tube cooler (PTC) was designed and tested. The cooler consists of two separate pulse tube coolers, in which the cold end of the first stage regenerator is thermally connected with the mid- dle part of the second regenerator. Compared to the tradi- tional coupled multi-stage pulse tube cooler, the mutual interference between stages can be significantly eliminated. The lowest refrigeration temperature obtained at the first stage pulse tube was 13.8 K. This is a new record for single stage PTC. With two compressors and two rotary valves driving mode, the separate two-stage PTC obtained a refrig- eration temperature of 2.5 K at the second stage. Cooling capacities of 508 mW at 4.2 K and 15 W at 37.5 K were achieved simultaneously. A one-compressor and one-rotary valve driving mode has been proposed to further simplify the structure of separate type PTC.
A novel 4 K separate two-stage pulse tube cooler (PTC) was designed andtested. The cooler consists of two separate pulse tube coolers, in which the cold end of the firststage regenerator is thermally connected with the middle part of the second regenerator. Compared tothe traditional coupled multi-stage pulse tube cooler, the mutual interference between stages cSnbe significantly eliminated. The lowest refrigeration temperature obtained at the first stage pulsetube was 13.8 K. This is a new record for single stage PTC. With two compressors and two rotaryvalves driving mode, the separate two-stage PTC obtained a refrigeration temperature of 2.5 K at thesecond stage. Cooling capacities of 508 mW at 4.2 K and 15 W at 37.5 K were achievedsimultaneously. A one-compressor and one-rotary valve driving mode has been proposed to furthersimplify the structure of separate type PTC.
基金
This work was supported by the Foundation for the Authors of National Excellent Doctoral Dissertation of P.R.China under contract No.200033
Fok Ying Tong Education Foundation under contract No.94013.
