eeFACT2016 - List of Authors (Belli, E.)

Paper	Title	Page
TUT3AH1	Collective Effects Issues for FCC-ee	100
	M. Migliorati University of Rome La Sapienza, Rome, Italy E. Belli CERN, Geneva, Switzerland G. Castorina, B. Spataro, M. Zobov INFN/LNF, Frascati (Roma), Italy S. Persichelli LBNL, Berkeley, California, USA
	The Future Circular Collider study, hosted by CERN to design post-LHC particle accelerator options in a worldwide context, represents a great challenge under several aspects, which require R&D on beam dynamics and new technologies. One very critical point is represented by collective effects, generated by the interaction of the beam with self-induced electromagnetic fields, called wake fields, which could produce beam instabilities, thus reducing the machines performance and limiting the maximum stored current. It is therefore very important to be able to predict these effects and to study in detail potential solutions to counteract them. In this paper the resistive wall and some other important geometrical sources of impedance for the FCC electron-positron accelerator are identified and evaluated, and their impact on the beam dynamics, which could lead to unwanted instabilities, is discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT3AH1
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TUT3AH7	Electron Cloud and Collective Effects in the Interaction Region of FCC-ee	130
	E. Belli, G. Rumolo CERN, Geneva, Switzerland E. Belli University of Rome "La Sapienza", Rome, Italy E. Belli INFN-Roma, Roma, Italy M. Migliorati University of Rome La Sapienza, Rome, Italy M. Migliorati INFN-Roma1, Rome, Italy
	The FCC-ee is an e⁺e⁻ circular collider designed to accommodate four different experiments in a beam energy range from 91 to 350 GeV and is a part of the Future Circular Collider (FCC) project at CERN. One of the most critical aspects of this new very challenging machine regards the collective effects which can produce instabilities, thus limiting the accelerator operation and reducing its performance. The following studies are focused on the Interaction Region of the machine. This talk will present preliminary simulation results of the power loss due to the wake fields generated by the electromagnetic interaction of the beam with the vacuum chamber. A preliminary estimation of the electron cloud build-up is also reported, whose effects have been recognized as one of the main limitations for the Large Hadron Collider at CERN.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT3AH7
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Collective Effects Issues for FCC-ee

100

M. Migliorati
University of Rome La Sapienza, Rome, Italy
E. Belli
CERN, Geneva, Switzerland
G. Castorina, B. Spataro, M. Zobov
INFN/LNF, Frascati (Roma), Italy
S. Persichelli
LBNL, Berkeley, California, USA

The Future Circular Collider study, hosted by CERN to design post-LHC particle accelerator options in a worldwide context, represents a great challenge under several aspects, which require R&D on beam dynamics and new technologies. One very critical point is represented by collective effects, generated by the interaction of the beam with self-induced electromagnetic fields, called wake fields, which could produce beam instabilities, thus reducing the machines performance and limiting the maximum stored current. It is therefore very important to be able to predict these effects and to study in detail potential solutions to counteract them. In this paper the resistive wall and some other important geometrical sources of impedance for the FCC electron-positron accelerator are identified and evaluated, and their impact on the beam dynamics, which could lead to unwanted instabilities, is discussed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT3AH1

Export •

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

TUT3AH7

Electron Cloud and Collective Effects in the Interaction Region of FCC-ee

130

E. Belli, G. Rumolo
CERN, Geneva, Switzerland
E. Belli
University of Rome "La Sapienza", Rome, Italy
E. Belli
INFN-Roma, Roma, Italy
M. Migliorati
University of Rome La Sapienza, Rome, Italy
M. Migliorati
INFN-Roma1, Rome, Italy

The FCC-ee is an e⁺e⁻ circular collider designed to accommodate four different experiments in a beam energy range from 91 to 350 GeV and is a part of the Future Circular Collider (FCC) project at CERN. One of the most critical aspects of this new very challenging machine regards the collective effects which can produce instabilities, thus limiting the accelerator operation and reducing its performance. The following studies are focused on the Interaction Region of the machine. This talk will present preliminary simulation results of the power loss due to the wake fields generated by the electromagnetic interaction of the beam with the vacuum chamber. A preliminary estimation of the electron cloud build-up is also reported, whose effects have been recognized as one of the main limitations for the Large Hadron Collider at CERN.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT3AH7

Export •

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