http://www.cnr.it/ontology/cnr/individuo/prodotto/ID192190

Nature of the Decrease of the Secondary-Electron Yield by Electron Bombardment and its Energy Dependence (Articolo in rivista)

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Nature of the Decrease of the Secondary-Electron Yield by Electron Bombardment and its Energy Dependence (Articolo in rivista) (literal)

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Alternative label

R. Cimino (1); M. Commisso (1); D. R. Grosso (1); T. Demma (2); V. Baglin (3); R. Flammini (1,4); R. Larciprete (1,5) (2012)
Nature of the Decrease of the Secondary-Electron Yield by Electron Bombardment and its Energy Dependence
in Physical review letters (Print); American Physical Society (APS), College Pk (Stati Uniti d'America)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

R. Cimino (1); M. Commisso (1); D. R. Grosso (1); T. Demma (2); V. Baglin (3); R. Flammini (1,4); R. Larciprete (1,5) (literal)

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1 LNF-INFN, Via E. Fermi 40, 00044 Frascati (Roma), Italy 2 Laboratoire de l'Acce´le´rateur Line´aire, CNRS-IN2P3, Universite´ Paris-Sud 11, Orsay, France 3 CERN, Geneva, Switzerland 4 CNR-IMIP Istituto Metodologie Inorganiche e Plasmi, Via Salaria Km. 29.300, 00019 Monterotondo Scalo (RM), Italy 5 CNR-ISC Istituto dei Sistemi Complessi, Via Fosso del Cavaliere 100, 00133 Roma, Italy (literal)

Titolo

Nature of the Decrease of the Secondary-Electron Yield by Electron Bombardment and its Energy Dependence (literal)

Abstract

We performed a combined secondary electron yield (SEY) and x-ray photoelectron spectroscopy study as a function of the electron dose and energy on a Cu technical surface representative of the LHC accelerator walls. The electron bombardment is accompanied by a clear chemical modification, indicating an increased graphitization as the SEY decreases. The decrease in the SEY is also found to depend significantly on the kinetic energy of the primary electrons. When low-energy primary electrons are employed (E <=20 eV), the reduction of the SEY is slower and smaller in magnitude than when higherenergy electrons are used. Consequences of this observation are discussed mainly for their relevance on the commissioning scenario for the LHC in operation at CERN (Geneva), but are expected to be of interest for other research fields. (literal)

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