A New Stainless Steel-Cased Gallium Cell and its Automatic Maintenance Apparatus

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A New Stainless Steel-Cased Gallium Cell and its Automatic Maintenance Apparatus (316.08 KB)

A new stainless steel-cased gallium cell has been developed. The new cell design, including an open cell version, is described. A new cell was compared against a NIST-certified gallium cell, and the difference between them was well within 0.1 mK. Multiple cells of the new design were intercompared with each other, with differences well within 0.1 mK. A new automatic maintenance apparatus has been developed for simplifying the operation. A melting plateau as long as seven days is easy to obtain using the new apparatus. The expanded uncertainty (k=2) was estimated to be about 0.2 mK for the whole system.