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CERN Document Server 2,050 のレコードが見つかりました。  1 - 10次最後  レコードへジャンプ： 検索にかかった時間： 0.77 秒 
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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.
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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.
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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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Numerical simulations studies on single-bunch instabilities driven by electron clouds at the LHC / Sabato, Luca (CERN) ; Iadarola, Giovanni (CERN) ; Mether, Lotta (CERN)
Instabilities driven by electron clouds in the LHC are studied by means of numerical simulations performed with the PyECLOUD-PYHEADTAIL suite. [...]
CERN-ACC-NOTE-2020-0050. - 2020. - 29 p.
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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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Electron Cloud and Heat Loads in Run 2 / Iadarola, G (CERN) ; Bradu, B (CERN) ; Dijkstall, P (CERN) ; Mether, L (CERN) ; Romano, A (CERN) ; Rumolo, G (CERN) ; Skripka, G (CERN) ; Tavian, L (CERN)
During Run 2, the 25 ns bunch spacing was routinely used for proton physics operation at the LHC. With this bunch spacing, electron cloud effects are significantly more severe than with the 50 ns spacing, which had been used for luminosity production in Run 1. [...]
Geneva, Switzerland : , 2019 - 12 p. - Published in : , pp. 221-232 Fulltext: PDF;
In : 9th LHC Operations Evian Workshop, Evian Les Bains, France, 30 Jan - 1 Feb 2019, pp.221-232
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MD 1266: Injection of "high performance reach" 80b 25 ns beam / Bartmann, Wolfgang (CERN) ; Fraser, Matthew Alexander (CERN) ; Iadarola, Giovanni (CERN) ; Kain, Verena (CERN) ; Velotti, Francesco Maria (CERN) ; Muller, Jeremy Alfred
This note summarises the measurements and observations performed during the LHC Machine Development concerning the injection of batches of 80 bunches for future “high performance reach” of the LHC [...]
CERN-ACC-NOTE-2017-0003. - 2017. - 9 p.
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