Cryostat à température variable entre 1 et 300 °K pour diffraction de neutrons

Abstract

We describe a cryostat designed for neutron diffraction work at stable temperatures from 1 to 300 °K which can be used in a magnetic field. The long time needed for these types of experiments is obtained from a very low thermal conductance between the resistor sample-heater and the cold source (liquid helium). Nevertheless thermal exchange between the sample and the cold source may be controlled by a charcoal device acting on the insulation vacuum