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
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&D needs.