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CERN Document Server Pronađeno je 2,046 zapisa  1 - 10slijedećikraj  idi na zapis: Pretraživanje je potrajalo 0.48 sekundi 
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Mitigation of Electron Cloud Effects in the FCC-ee Collider / Yaman, Fatih (Izmir Inst. Tech.) ; Iadarola, Giovanni (CERN) ; Kersevan, Roberto (CERN) ; Ogur, Salim (IJCLab, Orsay) ; Ohmi, Kazuhito (KEK, Tsukuba) ; Zimmermann, Frank (CERN) ; Zobov, Mikhail (Frascati)
Electron clouds forming inside the beam vacuum chamber due to photoemission and secondary emission may limit the accelerator performance. Specifically, the electron clouds can blow up the vertical emittance of a positron beam, through a head-tail-type single-bunch instability, if the central electron density exceeds a certain threshold value, that can be estimated analytically. [...]
arXiv:2203.04872.- 2022-08-17 - 11 p. - Published in : EPJ Tech. Instrum. 9 (2022) 9 Fulltext: 2203.04872 - PDF; document - PDF;
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(91)
ECLOUD’18 summary and outlook / Cimino, R (Frascati) ; Zimmermann, F (CERN)
This article reports some highlights from the joint INFN/ARIES workshop ECLOUD’18. We focus on electron-cloud eects in the LHC and at SuperKEKB, predictions for future machines like FCC-hh, HE-LHC and FCC-ee, models and parameters for the secondary-emission yield, recent trends in electron-cloud simulations, mitigation measures, and novel phenomena. [...]
2020 - 8 p. Fulltext from publisher: PDF;
In : ECLOUD’18: Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, La Biodola, Isola d'Elba, Italy, 3 - 7 Jun 2018, pp.229-236 (CERN-2020-007)
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3.
(79)
Electron cloud build-up studies for FCC-ee / Sabato, L (Ecole Polytechnique, Lausanne) ; Pieloni, T (Ecole Polytechnique, Lausanne) ; Iadarola, G (CERN) ; Mether, L (CERN)
The Future Circular Collider (FCC) study is developing designs for a new research infrastructure to host the next generation of higher performance particle colliders to extend the research currently being conducted at CERN. In particular, FCC-ee is an electron-positron collider, which is the first stage towards a 100 TeV proton-proton collider FCC-hh.FCC-ee may be affected by electron cloud (e-cloud) and the strongest effects are foreseen for the Z configuration, due to the highest number of bunches, which corresponds to the smallest bunch spacing. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) WEPA092 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPA092
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4.
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Implementation and benchmarking of the Furman-Pivi model for Secondary Electron Emission in the PyECLOUD simulation code / Wulff, Eric (Lund University (SE)) ; Iadarola, Giovanni (CERN)
The Furman-Pivi model for the secondary electron emission process has been implemented in the PyECLOUD simulation code and can now be used in alternative to the ECLOUD model, developed for the LHC beam screen surface at the time of the LHC design. [...]
CERN-ACC-NOTE-2019-0029. - 2019. - 30 p.
Full text
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5.
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Studies and Possible Mitigation of Electron Cloud Effects in FCC-ee / Yaman, Fatih (Izmir Inst. Tech.) ; Zimmermann, Frank (CERN)
In this work, we present numerical results for the electron cloud build-up and mitigation studies considering Arc Dipole and Drift sections of the FCC-ee collider. We report the central electron density that could be reached by minimising secondary electron contributions and the photoelectron generation rates in order to achieve e⁻ densities lower than the single-bunch instability threshold, considering the baseline beam parameters. [...]
2023 - 5 p. - Published in : JACoW eeFACT 2022 (2023) 154-158 Fulltext: PDF;
In : 65th ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+ e- Colliders (eeFACT2022), INFN, Frascati, Italy, 12 - 16 Sep 2022, pp.154-158
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CERN Yellow Report Front Cover ECLOUD’18: Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects - 6th Workshop on Electron-Cloud Effects (ECLOUD18) ECLOUD2018   3 - 7 Jun 2018  - La Biodola, Isola d'Elba, Italy  / Cimino, R. (ed.); Rumolo, G. (ed.); Zimmermann, F. (ed.)
This report contains the proceedings of the sixth electron-cloud workshop, ECLOUD'18, held, from 3 to 7 June 2018 at La Biodola (Isola d'Elba) Italy. The ECLOUD’18 workshopreviewed many recent electron-cloud (EC) observationsat existing storage rings, EC predictions for future accelerators, and various advanced electron-cloud studies. [...]
Geneva : CERN, 2020 - 254 p. CERN-2020-007
e-proceedings
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Summary of impedance issues and beam instabilities / Zimmermann, Frank (CERN)
This paper summarizes the session on impedance issues and beam instabilities at the ICFA workshop on future circular electron-positron factories "eeFACT2016" held at the Cockcroft Institute, Daresbury, from 24 to 27 October 2016. This session also covered active beam stabilization by feedback systems. [...]
CERN-ACC-2016-0332.- Geneva : CERN, 2017 - 6 p. Fulltext: PDF;
In : 58th ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e-Colliders, Daresbury, United Kingdom, 24 - 27 Oct 2016, pp.THS2H1
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Modeling microwave/electron-cloud interaction / Mattes, M. (EPFL-ISIC, Lausanne) ; Sorolla, E. (EPFL-ISIC, Lausanne) ; Zimmermann, F. (CERN)
Starting from the separate codes BI-RME and ECLOUD or PyECLOUD, we are developing a novel joint simulation tool, which models the combined effect of a charged particle beam and of microwaves on an electron cloud. Possible applications include the degradation of microwave transmission in tele-communication satellites by electron clouds; the microwave-transmission tecchniques being used in particle accelerators for the purpose of electroncloud diagnostics; the microwave emission by the electron cloud itself in the presence of a magnetic field; and the possible suppression of electron-cloud formation in an accelerator by injecting microwaves of suitable amplitude and frequency. [...]
arXiv:1310.0212.- Geneva : CERN, 2013 - 3 p.
Fulltext: PDF; Published version from CERN: PDF; External link: Preprint
In : ECLOUD’12: Joint INFN-CERN-EuCARD-AccNet Workshop on Electron-Cloud Effects, pp.177-180
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9.
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Simulation of the electron-cloud build up and its consequences on heat load, beam stability and diagnostics / Ruggiero, F (CERN) ; Rumolo, Giovanni (CERN) ; Zimmermann, Frank (CERN)
Photoemission and secondary emission are known to give rise to a quasi-stationary electron cloud inside the LHC beam pipe through a beam-induced multipacting process. We investigate the phenomena of electron-cloud build up and related effects via computer simulation. [...]
CERN-SL-2000-073-AP.- Geneva : CERN, 2001 - 24 p. Report - Published in : Phys. Rev. Spec. Top. Accel. Beams 4 (2001) 012801 APS Published version, local copy: PDF; Access to fulltext document: PDF; - Please contact the library if you need to access this document.
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CLIC-DR electron cloud build up simulations / Yaman, F (Izmir Inst. Tech.) ; Iadarola, G (CERN) ; Schulte, D (CERN)
This study investigates impact of beam pipe material and external magnetic field on electron cloud build up mechanism. The machine parameters are in the scope of CLIC damping rings. [...]
2020 - 3 p. - Published in : 10.23732/CYRCP-2020-009.309 Fulltext: PDF;
In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.309-311 (CERN-2020-009)
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