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Progress of CEM Works in Mercury Cells Assembly

Follow the progress of CEM works in the Triple Point of Mercury Cells assembly for more accurate fixed points. Learn about the cleaning process, cells filling methods, distillation techniques, and chemical analysis for precise results.

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Progress of CEM Works in Mercury Cells Assembly

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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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