Experimental results on the free cooling power available on 4K pulse tube coolers

Thomas Prouvé (1) , Henri Godfrin (1) , Christian Gianese (2) , Sebastien Triqueneaux (3) , Alain Ravex (3)

1 NEEL - UBT - Ultra-basses températures
2 NEEL - LIQUEFACTEUR - Centre de liquéfaction
3 ALAT - Air Liquide Advanced Technologies [Sassenage]

We report experimental results on the free cooling power available at the level of the second stage regenerator of a 4K pulse tube cooler. By using two localised heat exchangers we obtained additional cooling power, in the range 400 and 600mW at 4.8K or between 500 and 700mW at 18K. We have investigated in detail the thermal behavior of the system. In this manuscript we report on the evolution of the temperature of the heat exchangers and the pulse tube stages under different distributions of the total heat load.

Domaines: Autre [cond-mat.other]

Thomas Prouvé, Henri Godfrin, Christian Gianese, Sebastien Triqueneaux, Alain Ravex. Experimental results on the free cooling power available on 4K pulse tube coolers. Journal of Physics: Conference Series, 2009, 150, pp.012038. ⟨10.1088/1742-6596/150/1/012038⟩. ⟨hal-00921375⟩