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EUROMET PROJECT nº 732 “Towards more accurate fixed points”:

EUROMET PROJECT nº 732 “Towards more accurate fixed points”:. Progress of CEM Works in the Triple Point of Mercury. Cells assembly. The mercury : supplied by the Almaden mine (Spain). The material : Borosilicate glass. Cells assembly.

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EUROMET PROJECT nº 732 “Towards more accurate fixed points”:

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  1. EUROMET PROJECT nº 732 “Towards more accurate fixed points”: Progress of CEM Works in the Triple Point of Mercury

  2. Cells assembly The mercury:supplied by the Almaden mine (Spain). The material:Borosilicate glass.

  3. Cells assembly The cleaning:1 day NO3H + rinsed with distilled water + 3 days steam cleaning + drying: heated in vacuum The set up:a distillation + vacuum system .

  4. Cells filling A1P1 Hg directly poured from the bottle A1P2D2 1 distillation A1P4D1 2 distillation A1P4D2 2 distillation

  5. Distillation process 2 ampoules 1 big cell 2 ampoules 6 kg 1 reservoir 2 ampoules 1 reservoir 1 small cell 1 big cell 1 ampoule 2,5 kg 1 reservoir

  6. (Big) Cells filled Hg (from the bottle): Purity: 99,999 939 0 % Isotopic composition: in process A1P1 Hg (1 distillation): Purity: 99,999 999 5 % Isotopic composition: in process A1P2D2 A1P4D1 Hg (2 distillation): Purity: in process Isotopic composition: in process

  7. Chemical Analysis

  8. Cells characterization

  9. Cells comparison • Alcohol bath. • 2 cells at the same time. • Differences estimated by DW (0 mA) • Differences measured with respect to the cell A1P2D2.

  10. Future works • Calorimeter for small cells. • Study of the impurities influence doping small cells.

  11. Thanks for your attention

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