Paper |
Title |
Page |
TUPP036 |
"Scrubbing" Process of Cu Surfaces Induced by Electron Bombardment
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1619 |
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- D. R. Grosso, P. Barone, A. Bonanno, M. Camarca, M. Commisso, A. Oliva, F. Xu
INFN Gruppo di Cosenza, Arcavacata di Rende (Cosenza)
- R. Cimino
INFN/LNF, Frascati (Roma)
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Energy distribution curves of electrons emitted from accelerator used metal surfaces have been measured for electron irradiation with a primary energy from 20 to 400 eV. We separated the contributions of reflected, rediffused and true-secondary electrons out from the spectra and observed significant differences in their incidence angle dependence. These results provide crucial information on the electron cloud formation in particle accelerators and may shed light on the involved physical mechanisms
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WEPD045 |
Hydrogen Cryosorption on Multi Walled Carbon Nanotubes
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2515 |
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- F. Xu, M. Barberio, P. Barone, A. Oliva, L. Papagno, V. Pirronello, R. Vasta
INFN Gruppo di Cosenza, Arcavacata di Rende (Cosenza)
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We present a Temperature Programmed Desorption (TPD) study on H2 adsorption on multiwalled carbon nanotubes (MWNT) at very low pressure (< 10-6 Torr) and temperature (12-30 K). Our results show a hydrogen take up limit in the range of 10-8 mol per gram depending on the adsorption temperature. We compare the MWNT cryosorption capacity with that of commonly used activated carbon and discuss the possibility of employing MWNT as cryosorber in large particle accelerators.
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