A new method of mounting stripper foils
Résumé. 2014 Une méthode est proposée pour le montage des feuilles d’épluchage de charge utilisant une grille de tungstène à haute transmission. Cela permet de subdiviser la feuille en un grand nombre de feuilles indépendantes, le mauvais fonctionnement de l’une d’elles n’affecte pas les autres. Il est donc possible d’utiliser une grande feuille que l’on déplace dans le faisceau afin de prolonger sa durée d’utili- sation. Des résultats sont décrits ainsi qu’un mécanisme prototype pour l’exploitation de ce concept. Abstract. 2014 A method of mounting stripper foils is proposed using a high transmission tungsten grid. This enables the foil to be subdivided into a large number of independent foils, failure of any one of which does not effect the rest. It is thus possible to use a large foil moved across the beam to obtain a very long life. The results are shown and a prototype mechanism to exploit this concept is described.
USE OF CARBON FOILS FOR HEAVY-ION STRIPPERS.
Abstract The lifetime of carbon foils when bombarded by high-density heavy-ion beams is increased if the foil is kept at a high temperature.
Resonant Auger decay study of C1s -> pi* core-excited OCS
The present work aims at characterizing short-lived C1s((-1)) pi*((1)) core-excited states of the OCS molecule based on the analysis of the vibrational fine structure and lineshape profiles of the high-resolution resonant Auger decay spectra recorded at the excitation energies along the C1s -> pi* resonance in the binding energy region 15-19eV. Very different behavior in terms of lineshape and resonant enhancement is observed for the (A) over tilde, (B) over tilde and (C) over tilde final states. This is explained by (1) the variation in the C-O bond lengths for the states involved in the electronic relaxation and (2) different contributions in terms of Mulliken population to the molecular orbitals determining the electronic character of the corresponding states. Since the final-state geometries are known from a number of previous experiments and ab initio calculations, the geometry of the C1s((-1)) pi*((1)) intermediate states can be predicted in analogy with e.g. the N-2, CO2 and N2O molecules. (C) 2009 Elsevier B.V. All rights reserved. (Less)