Joint CARE-ELAN, CARE-HHH-APD, and EUROTEV-WP3 Workshop on Electron Cloud Clearing

Proceedings
Report number	CERN-AB-2007-064 ; CARE-ELAN-Document-2007-006 ; EUROTEV-Report-2007-060 ; CARE-Conf-07-007-HHH ; CARE-Conf-2007-007-HHH
Conference title	Joint CARE-ELAN, CARE-HHH-APD, and EUROTEV-WP3 Workshop on Electron Cloud Clearing
Related conference title(s)	Electron Cloud Effects and Technological Consequences ECL2
Date(s), location	1 - 2 Mar 2007, CERN, Geneva, Switzerland
Editor(s)	Caspers, Friedhelm (ed.) ; Scandale, Walter (ed.) ; Schulte, D (ed.) ; Zimmermann, F (ed.)
Collaboration	CARE-HHH-APD, CARE-ELAN and EuroTeV-PW3 Collaboration
Imprint	Geneva : CERN, 2007 - 92 p.
Note	revised version submitted on 2007-10-03 10:42:01
Subject category	Accelerators and Storage Rings
Abstract	This report contains the Proceedings of the joint CARE-HHH-APD, CARE-ELAN, and EUROTEV-WP3 Mini-Workshop on 'Electron Cloud Clearing - Electron Cloud and Technical Consequences', "ECL2", held at CERN in Geneva, Switzerland, 1-2 March 2007). The ECL2 workshop explored novel technological remedies against electron-cloud formation in an accelerator beam pipe. A primary motivation for the workshop was the expected harmful electron-cloud effects in the upgraded LHC injectors and in future linear colliders, as well as recent beam observations in operating facilities like ANKA, CESR, KEKB, RHIC, and SPS. The solutions discussed at ECL2 included enamel-based clearing electrodes, slotted vacuum chambers, NEG coating, and grooves. Several of the proposed cures were assessed in terms of their clearing efficiency and the associated beam impedance. The workshop also reviewed new simulation tools like the 3D electron-ion build-up 'Faktor', modeling assumptions, analytical calculations, beam experiments, and laboratory measurements. Several open questions could be identified. The workshop reinforced inter-laboratory collaboration on electron-cloud suppression, and it concluded with a discussion of the next steps to be taken.