We made numerous runs at concentrations of 15.5 wt%, which is well above the eutectic composition. Here are some annotated examples, along with brief summaries of each run.
Initial Pressure |
Label | Summary Description |
50 MPa | 15NaS_50MPa_19Oct05 | A straightforward run at a nominal pressure of 50 MPa. The solid phase includes Ice Ih. |
250 MPa | 15NaS_250MPa_03Oct05 | A straightforward run at a nominal pressure of 250 MPa in the high-pressure Ice regime. |
0.4 MPa | 15NaS_0.4MPa_19Sep05 | A run at low pressure. |
50 MPa | 15NaS_050MPa_12Jan12 | A longer, more complex, run at 50 MPa. |
75 MPa | 15NaS_075MPa_07Aug11 | A longer run with multiple passes through the eutectic transition. |
100 MPa | 15NaS_100MPa_11Oct05 | A run at 100 MPa |
150 MPa | 15NaS_150MPa_20Aug08 | A run at 150 MPa. Condensation on the lenses obscured the view during most of the run. |
150 MPa | 15NaS_150MPa_14Jul11 | A run at 150 MPa with an unexpectedly low temperature transition. |
175 MPa | 15NaS_175MPa_30Jun11 | A run at 175 MPa with an unexpectedly low temperature transition. |
230 MPa | 15NaS_230MPa_08Sep11 | A run at pressure 230 MPa. This run initially freezes to a low-density Ice Ih phase, but after a slight increase in pressure, switches to a high-density ice phase. |
230 MPa | 15NaS_230MPa_23Sep11 | A run starting at pressure 230 MPa. This run appears to include both low-density and high-density ice phases. The pressure was slowly increased during the run until the ice phase changed. |
250 MPa | 15NaS_250MPa_08Feb10 | A run at pressure 250 MPa in the Ice III regime. |
250 MPa | 15NaS_250MPa_14May10 | A run at pressure 250 MPa in the Ice III regime. |
250 MPa | 15NaS_250MPa_17Feb06 | A run at pressure 250 MPa in the Ice III regime. |
250 MPa | 15NaS_250MPa_17Oct11 | A run starting at a pressure of 250 MPa. The pressure was gradually increased to 270 MPa to see how stable the initial ice phase was, and then gradually decreased to 230 MPa,. |
250 MPa | 15NaS_250MPa_26Oct11 | A run starting at a pressure of 250 MPa. The pressure was gradually increased to around 310 MPa. |
260 MPa | 15NaS_260MPa_17Nov11 | A run starting at a pressure of 260 MPa. The pressure was gradually increased to around 320 MPa. |
265 MPa | 15NaS_265MPa_31Jul10 | A run starting at a pressure of 265 MPa. The pressure was gradually increased to around 320 MPa. |
280 MPa | 15NaS_280MPa_17Feb10 | A run at a pressure of 280 MPa. |
280 MPa | 15NaS_280MPa_24May10 | A simple run at pressure 280 MPa. |
300 MPa | 15NaS_300MPa_01Jun10 | A simple run at pressure 300 MPa |
300 MPa | 15NaS_300MPa_07Jun10 | A long run starting at a pressure of 300 MPa, but with the pressure systematically lowered to 220 MPa and then raised back up to 260 MPa to monitor various transitions. |
300 MPa | 15NaS_300MPa_26Sep05 | A run at pressure 300 MPa |
320 MPa | 15NaS_320MPa_04Dec11 | A run at pressure 320 MPa |
320 MPa | 15NaS_320MPa_24Feb10 | A run at pressure 320 MPa |
325 MPa | 15NaS_325MPa_07Jul10 | A run at pressure 325 MPa |
325 MPa | 15NaS_325MPa_15Jul10 | A run at pressure 325 MPa |
325 MPa | 15NaS_325MPa_28Feb06 | A run at pressure 325 MPa |
350 MPa | 15NaS_350MPa_03Mar10 | A run at pressure 350 MPa |
350 MPa | 15NaS_350MPa_19Dec11 | A run at pressure 350 MPa |
350 MPa | 15NaS_350MPa_23Jun10 | A run at pressure 350 MPa |
385 MPa | 15NaS_385MPa_09Mar10 | A run at pressure 385 MPa |