Figure 9
Upper plot: behaviour of the total contraction of the rod ΔLtot as a function of zscan for the simulated case with the linear temperature profile along the rod and uncompensated evaporation of the helium. ΔL1, ΔL2, ΔL3 represent the contribution of the contraction/elongation of the rod in each region (1, 2, 3). Lower plot: evolution of the liquid helium level as a function of the Hall probe position. |