Thermal desorption mass spectrometer for mass metrology.
This article presents a device for the study of physisorbed elements on polished surfaces (diameter ⩽56 mm) of the kind used in mass metrology. The technique is based on mass spectrometry of molecules desorbed after heating under vacuum of the analyzed surface. We describe a first application of the device to study current and future mass standards in order to understand how their surface reactivity depends on storage conditions, cleaning processes, and polishing methods. Surface contamination analysis by thermal desorption mass spectrometry to examine the effect of cleaning on pure iridium is given as an example.
Laboratoire commun de métrologie LNE-CNAM, 61 rue du Landy, 93210 La Plaine Saint-Denis, France.
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Silvestri
Laboratoire commun de métrologie LNE-CNAM, 61 rue du Landy, 93210 La Plaine Saint-Denis, France.
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Azouigui
Laboratoire commun de métrologie LNE-CNAM, 61 rue du Landy, 93210 La Plaine Saint-Denis, France.
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Bouhtiyya
Laboratoire commun de métrologie LNE-CNAM, 61 rue du Landy, 93210 La Plaine Saint-Denis, France.
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Macé
Laboratoire commun de métrologie LNE-CNAM, 61 rue du Landy, 93210 La Plaine Saint-Denis, France.
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Plimmer
Laboratoire commun de métrologie LNE-CNAM, 61 rue du Landy, 93210 La Plaine Saint-Denis, France.
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Pinot
Laboratoire commun de métrologie LNE-CNAM, 61 rue du Landy, 93210 La Plaine Saint-Denis, France.
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Tayeb-Chandoul
Institut Supérieur d'Informatique et des Techniques de Communication, Université de Sousse, G.P.1 Hammam Sousse 4011, Tunisia.
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Hannachi