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CERN Document Server 2,050 записей найдено  1 - 10следующийконец  перейти к записи: Поиск длился 0.64 секунд. 
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Linearized method for the study of transverse instabilities driven by electron clouds / Iadarola, Giovanni (CERN) ; Mether, Lotta (CERN) ; Mounet, Nicolas (CERN) ; Sabato, Luca (CERN)
We present a linearized method to study transverse instabilities due to electron clouds. It is based on an accurate and compact characterization of the cloud dipolar and quadrupolar forces, that can be easily obtained from quick single-pass numerical simulations. [...]
2020 - 15 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 081002 Fulltext from Publisher: PDF;
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Electron Cloud Effects / Iadarola, G (CERN) ; Rumolo, G (CERN)
Secondary electron emission in combination with the elecromagnetic fields generated by a bunched beam can lead to the formation of electron clouds in the beam chambers of particle accelerators. The interaction of the circulating beam with the e-cloud can lead to transverse instabilities, beam losses, transverse emittance degradation. [...]
2018 - 8 p. - Published in : CERN Yellow Rep. Conf. Proc. 1 (2018) 49-56 Fulltext: PDF;
In : ICFA Mini-Workshop on Impedances and Beam Instabilities in particle accelerators, Benevento, Italy, 18 - 22 Sep 2017, pp.49-56 (CERN-2018-003-CP)
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A Vlasov approach to study transverse instabilities driven by electron clouds / Iadarola, Giovanni (CERN) ; Mether, Lotta (CERN) ; Mounet, Nicolas (CERN) ; Sabato, Luca
We present a linearized method to study transverse instabilities due to electron clouds. [...]
CERN-ACC-NOTE-2020-0054. - 2020. - 22 p.
Full text
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Properties of the electromagnetic fields generated by a circular-symmetric e-cloud pinch in the ultra-relativistic limit / Iadarola, Giovanni (CERN)
The electromagnetic fields generated by an electron cloud in the beam pipe of a particle accelerator introduce additional forces in the dynamics of the particle beams, which can be responsible of beam instabilities, beam losses and transverse emittance blow-up [...]
CERN-ACC-NOTE-2019-0017. - 2019. - 10 p.
Full text
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A simplified analytical model for the electron cloud build-up process / Iadarola, Giovanni (CERN)
A simple analytical model is introduced to illustrate the main features involved in the formation of electron clouds in the beam pipes of particle accelerators [...]
CERN-ACC-NOTE-2021-0029. - 2021.
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Numerical modeling of fast beam ion instabilities / Mether, Lotta (CERN) ; Iadarola, Giovanni (CERN) ; Rumolo, Giovanni (CERN)
The fast beam ion instability may pose a risk to the operation of future electron accelerators with beams of high intensity and small emittances, including several structures of the proposed CLIC accelerator complex. Numerical models can be used to identify necessary vacuum specifications to suppress the instability, as well as requirements for a possible feedback system. [...]
2016 - 5 p. - Published in : 10.18429/JACoW-HB2016-WEAM4X01 Fulltext: PDF;
In : 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Malmö, Sweden, 3 - 8 Jul 2016, pp.WEAM4X01
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A Linearized Vlasov Method for the Study of Transverse e-Cloud Instabilities / Johannesson, Sofia (CERN ; Ecole Polytechnique, Lausanne) ; Iadarola, Giovanni (CERN) ; Seidel, Mike (PSI, Villigen ; Ecole Polytechnique, Lausanne)
Using a Vlasov approach, electron cloud driven instabilities can be modeled to study beam stability on time scales that conventional Particle In Cell simulation methods cannot access. The Vlasov approach uses a linear description of electron cloud forces that accounts for both the betatron tune modulation along the bunch and the dipolar kicks from the electron cloud. [...]
2024 - 4 p. - Published in : JACoW HB 2023 (2024) 462-465 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.462-465
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A novel Vlasov approach for modeling electron cloud instabilities / Johannesson, Sofia (Ecole Polytechnique, Lausanne ; CERN ; ESS, Lund) ; Iadarola, Giovanni (CERN) ; Seidel, Mike (PSI, Villigen ; Ecole Polytechnique, Lausanne)
This paper discusses the generalization of the two-dimensional impedance model in the presence of an electron cloud. It will be discussed the implementation of a linear model of the e-cloud forces including both dipolar and quadrupolar forces to improve the modeling of the electron cloud instabilities. [...]
2024 - 6 p. - Published in : JACoW IPAC 2024 (2024) MOZD2 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOZD2
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E-Cloud diagnostics and observations / Jiménez, J M (CERN) /on behalf of the CERN Electron Cloud Study Team
CERN, 2009 - 8 p. Published version from CERN: PDF;
In : Final CARE-HHH Workshop on Scenarios for the LHC Upgrade and FAIR, Chavannes-de-Bogis, Switzerland, 24 - 25 Nov 2008, pp.120-127 (CERN-2009-004)
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Non-monotonic dependence of heat loads induced by electron cloud on bunch population at the LHC / Skripka, Galina (CERN ; Dubna, JINR) ; Iadarola, Giovanni (CERN) ; Mether, Lotta (CERN) ; Rumolo, Giovanni (CERN)
Electron cloud effects are among the main performance limitations for the operation of the Large Hadron Collider with 25 ns bunch spacing. Electrons impacting on the beam screens of the superconducting magnets induce a significant heat load reaching values close to the full cooling capacity available from the cryogenic system in some LHC sectors. [...]
2022 - 9 p. - Published in : Eur. Phys. J. Plus 137 (2022) 849 Fulltext: PDF;
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