title: CERN Yellow Reports: Conference Proceedings, Vol. 7 (2020): ECLOUD’18 : Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, 3–7 June 2018, La Biodola, Isola d’Elba, Italy
title: ECLOUD’18 : Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, 3–7 June 2018, La Biodola, Isola d’Elba, Italy
titleType: AlternativeTitle
Creators: name: CERN Yellow Reports: Conference Proceedings
Publisher: name: CERN Yellow Reports: Conference Proceedings
Year: 2020

description: Editors: R. Cimino, G. Rumolo, F. Zimmermann 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 workshop reviewed many recent electron-cloud (EC) observations at existing storage rings, EC predictions for future accelerators, and various advanced electron-cloud studies. The existence of EC effects in many frontier accelerators has by now been firmly established. It is a consequence of the strong coupling between a positively charged particle beam and a cloud of electrons that almost inevitably builds up inside the vacuum chamber. The EC causes various effects limiting accelerator performance, such as beam instabilities, beam losses, emittance growth, increases in vacuum pressure, additional heat load on the vacuum chamber walls inside cold magnets, and interference with certain types of beam diagnostics. At ECLOUD’18, recent EC studies were presented, discussed and compared: electron-cloud observations at the LHC, SuperKEKB, CESR-TA and DAFNE; electron-cloud predictions for FAIR, NICA, EIC and for the FCC and other machines; electron-cloud mitigation measures, such as clearing electrodes, graphite/carbon coatings, and chemically or laser treated surfaces; modeling of incoherent electron-cloud effects; self-consistent simulations including ionized molecules; synergies with other communities like the Valencia Space Consortium and the European Space Agency, surface science experts and specialists for conventional accelerator impedance. ECLOUD’18 identified a number of open questions and defined future R&amp;D needs.
description: ECLOUD’18 summary and outlook...229 Intra-bunch feedback system development at DAΦNE...223 Complex technological solutions for particle accelerators...217 Laser ablated surface engineering: from discovery to machine application...209 Electron cloud effect and its cures in the SuperKEKB positron ring...201 Preliminary results obtained with the LHC Vacuum Pilot Sector...195 Simulations of synchrotron-radiation-induced electron production in the CESR vacuum chamber wall...183 Electron cloud effects in SuperKEKB commissioning...179 Coldex: A tool to study cold surfaces in accelerators...165 Characterisation of technical surfaces at cryogenic temperature under electron bombardment...159 SEY and other material properties studies at cryogenic temperatures...153 Synchrotron radiation interaction with cryosorbed layers for astrochemical investigations...147 Experiments with stable confined electron columns...143 Facets of spacecraft charging; critical temperature and dependence on ambient electron density...137 Recent secondary electron modeling at Princeton Plasma Physics Laboratory...131 Photo reflectivity and photo electron yield from technical surfaces...125 The effect of the structural properties on the SEY of C materials...119 SEY from noble metals...115 Experimental studies on secondary electron emission characteristics of accelerator chamber materials...109 Surface characterization of vacuum components extracted from LHC dipole magnet...105 Secondary electron yield of surfaces: what we know and what we still need to know...97 Instability caused by electron cloud in combined function magnets: the FERMILAB experience...91 Sub-THz EM characterization of coated material...83 How does a cryogenic system cope with e-cloud induced heat load?...73 Beam induced dynamic pressure during Run 2 (2015-2018)...65 Electron cloud build-up in two-beam regions for HL-LHC, heat load and vacuum aspects...59 Overview on heat loads in the LHC...51 Investigating the role of photoemission in the e-cloud formation at the LHC...39 Measurements and simulations of electron-cloud-induced tune shifts and emittance growth at CesrTA...27 Coupled-bunch instabilities and related effects due to electron cloud in SuperKEKB LER...21 Electron cloud effects at the CERN accelerators...13 Electron cloud effects in accelerators ...1