IPAC2014 - List of Authors (Romano, A.L.)

Paper	Title	Page
WEPME032	Detailed Investigation of the Low Energy Secondary Electron Yield of Technical Cu and its Relevance for LHC	2329
	R. Cimino, L.A. Gonzalez, A.L. Romano INFN/LNF, Frascati (Roma), Italy R. Cimino, G. Iadarola, G. Rumolo CERN, Geneva, Switzerland R. Larciprete ISM-CNR, Rome, Italy
	The detailed study of the Secondary Electron Yield (SEY) of technical Cu for very low electron landing energies (from 0 to 30 eV) is very important for electron cloud build up in high intensity accelerators and in many other fields of research. However, this question has been rarely addressed due to the intrinsic experimental complexity to control very low energy electrons. Furthermore, several results published in the past have been recently questioned for allegedly suffering from experimental systematics. In this paper, we critically review the experimental method used to study low energy SEY and define more precise energy regions, in which the experimental data can be considered valid. The new SEY curves are then fed into e-cloud simulation codes to address their impact for electron cloud predictions in the LHC.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPME032
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WEPME033	Search for New e-cloud Mitigator Materials for High Intensity Particle Accelerators	2332
	R. Cimino, S.T. O'connor, A.L. Romano INFN/LNF, Frascati (Roma), Italy V. Baglin, G. Bregliozzi, R. Cimino CERN, Geneva, Switzerland M.R. Masullo INFN-Napoli, Napoli, Italy S. Petracca, A. Stabile INFN-Salerno, Baronissi, Salerno, Italy
	Electron cloud is an ubiquitous effect in positively charged particle accelerators and has been observed to induce unwanted detrimental impacts on beam quality, stability, vacuum etc. A great effort has been recently devoted to the search of new material morphology and/or coatings which can intrinsically mitigate beam instabilities deriving from electron cloud effects. In this context, we present some characterization of Cu foams, available from the market, and their qualification in terms of their vacuum behavior, impedance, secondary electron yield, gas desorption etc. More experimental effort is required to finally qualify foams as a mature technology to be integrated in accelerator environments. But, our preliminary results suggests that, when compatible with geometrical constrains, Cu foams can be utilized when low desorption yields are required and as e-cloud moderator in future particles accelerators.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPME033
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Detailed Investigation of the Low Energy Secondary Electron Yield of Technical Cu and its Relevance for LHC

2329

R. Cimino, L.A. Gonzalez, A.L. Romano
INFN/LNF, Frascati (Roma), Italy
R. Cimino, G. Iadarola, G. Rumolo
CERN, Geneva, Switzerland
R. Larciprete
ISM-CNR, Rome, Italy

The detailed study of the Secondary Electron Yield (SEY) of technical Cu for very low electron landing energies (from 0 to 30 eV) is very important for electron cloud build up in high intensity accelerators and in many other fields of research. However, this question has been rarely addressed due to the intrinsic experimental complexity to control very low energy electrons. Furthermore, several results published in the past have been recently questioned for allegedly suffering from experimental systematics. In this paper, we critically review the experimental method used to study low energy SEY and define more precise energy regions, in which the experimental data can be considered valid. The new SEY curves are then fed into e-cloud simulation codes to address their impact for electron cloud predictions in the LHC.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPME032

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPME033

Search for New e-cloud Mitigator Materials for High Intensity Particle Accelerators

2332

R. Cimino, S.T. O'connor, A.L. Romano
INFN/LNF, Frascati (Roma), Italy
V. Baglin, G. Bregliozzi, R. Cimino
CERN, Geneva, Switzerland
M.R. Masullo
INFN-Napoli, Napoli, Italy
S. Petracca, A. Stabile
INFN-Salerno, Baronissi, Salerno, Italy

Electron cloud is an ubiquitous effect in positively charged particle accelerators and has been observed to induce unwanted detrimental impacts on beam quality, stability, vacuum etc. A great effort has been recently devoted to the search of new material morphology and/or coatings which can intrinsically mitigate beam instabilities deriving from electron cloud effects. In this context, we present some characterization of Cu foams, available from the market, and their qualification in terms of their vacuum behavior, impedance, secondary electron yield, gas desorption etc. More experimental effort is required to finally qualify foams as a mature technology to be integrated in accelerator environments. But, our preliminary results suggests that, when compatible with geometrical constrains, Cu foams can be utilized when low desorption yields are required and as e-cloud moderator in future particles accelerators.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPME033

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)