The invention discloses a
sample temperature and
humidity control experiment device of a small-angle
neutron scattering
spectrometer, which comprises a shell
assembly, a heat preservation medium conveying mechanism and a reaction medium conveying mechanism, and is characterized in that the shell
assembly comprises a shell, an incident window and an emergent window, the shell is provided with an incident port, an emergent port, an incident channel and a
scattering channel, the incident window is installed at the incident port, and the
scattering channel is installed at the emergent port; the emergent window is mounted at the emergent opening, the incident window, the emergent window and the shell jointly define a sample cavity, and a heat preservation space is further formed between the inner wall and the outer wall of the shell; the heat-insulating medium conveying mechanism circularly conveys a heat-insulating medium to the heat-insulating space; and the reaction medium conveying mechanism circularly conveys a reaction medium with preset temperature and
humidity to the sample cavity. The heat preservation medium circularly flowing in the heat preservation space arranged around the sample cavity can avoid fluctuation of temperature and
humidity in the sample cavity, ensure uniformity of the temperature and humidity in the sample cavity, avoid
water vapor generated by condensation of the reaction medium due to temperature change, further avoid interference of humidity and improve accuracy of
neutron scattering experiment results.