M. Bonetti et P. Calmettes, A VERY PRECISELY REGULATED COMPACT THERMOSTAT FOR SMALL-ANGLE NEUTRON-SCATTERING, Review of scientific instruments, 68(11), 1997, pp. 4163-4168
We have built a simple two-stage thermostat for measuring small-angle
neutron scattering from liquids or solids in the vicinity of a phase t
ransition. The thermostat was tested between 20 and 75 degrees C. The
long-term temperature stability varies within +/-0.2 and +/-0.5 mK, de
pending on the set-point temperature. Positive and negative temperatur
e steps of 0.5 mK and more can be obtained without overshoot. Small-an
gle neutron spectra from a binary ionic mixture in the critical domain
are also reported. (C) 1997 American Institute of Physics. [S0034-674
8(97)04611-X].