E. Pentti, A. Sebedash, and J. Tuoriniemi
The work on helium mixtures was continued at two fronts. The results of the first set of experiments, terminated during the previous year, were analyzed by E. Pentti in his M.Sc. thesis. The emphasis was at the thermal analysis aiming at better understanding of the conditions during the previous measurements and also at finding the optimal cooling conditions for the helium mixtures. The next set of experiments, based on a novel cooling technique of adiabatic mixing of superfluid 3He with 4He being released from a melting 4He crystal, is about to be installed into the cryostat. This experiment has been prepared in collaboration with the Kapitza Institute, Moscow (A. Sebedash).