A refrigerating machine of the genus 3he - 4he and pumping device of the superfluid 4he

摘要

P refrigerating machine he - he in which he superfluid is circulated by a pumping device thermomechanical based on the pumping effect of a jet, and is constituted by several pumps a jet a, b, c, d montees in series. / p & & p & application: preparation of very low temperatures. / p