ECLOUD'12

chaired by Roberto Cimino (LNF), FRANK ZIMMERMANN (CERN), Roberto Cimino
from to (Europe/Rome)
at La Biodola, Isola d'Elba
Description The fifth electron-cloud workshop, ECLOUD'12, will take place from 5 to 8 June, 2012 at La Biodola (isola d'Elba) Italy. The existence of the electron-cloud effect (ECE) has been firmly established experimentally at essentially all modern storage rings, either via performance limitations or by deliberate provocation. The ECE is a consequence of the strong coupling between a charged-particle beam and a cloud of electrons that inevitably develops inside the vacuum chamber. Resulting deleterious effects include beam instabilities, beam losses, emittance growth, increases in vacuum pressure, added heat load at the vacuum chamber walls, and interference with certain beam diagnostics. Electron-cloud effects are incompletely understood dynamical phenomena. While the fundamental mechanisms are well recognized and the qualitative picture clear, the phenomena involves many surface properties and geometrical parameters of the vacuum chamber coupled in a nontrivial way with the beam characteristics. In addition, the relevant time and energy scales span a wide range, and many of the essential parameters are not well known a priori. Hence the detailed prediction of ECE's at a given machine, not to mention the extrapolation from one machine to another, are subject to uncertainties. High-power microwave applications in modern satellites are perturbed by phenomena of multipacting and RF breakdown, which are governed by the same surface parameters as ECE in accelerators, which, especially for multi-carrier signals, exhibit very similar characteristics and electron-cloud build-up time scales, and which can be modelled by similar simulation tools.

Since the last ECLOUD workshop in 2010, an intense R&D effort has been under way to further understand the physics of the electron cloud and to investigate new methods for the mitigation of its adverse consequences. In particular, a crash effort is ongoing at CERN since late 2010 to understand and mitigate electron-cloud phenomena in the LHC. Furthermore, the SuperB and SuperKEKB factories have been approved; as a consequence of the high beam intensity in these machines, the ECE is expected to be significant, and it is urgent to better quantify and understand the associated phenomena.

The ECLOUD'12 workshop will be a timely meeting at which to present and discuss many recent and new electron-cloud observations at the LHC, electron cloud predictions for FAIR, SuperB and SUPER KEKB, electron-cloud studies at DAFNE, electron cloud mitigation by clearing electrodes and graphite/carbon coatings, modeling of incoherent electron-cloud effects, self-consistent simulations, synergies with other communities like the Valencia Space Consortium and the European Space Agency.

The ECLOUD'12 program will focus on: a review of EC observations at existing machines; recent experimental efforts to characterize the EC (including EC diagnostics, experimental techniques, characterization of mitigation methods, and characterization of beam instabilities and emittance growth); the status of EC physics models and simulation codes and their comparison with recently acquired experimental data; and the mitigation requirements and potential performance limitations imposed by the EC on upgraded and future machines. A dedicated session will address problems related to RF breakdown and multipacting for space applications.

ECLOUD'12 will be held at the Hermitage Hotel in La Biodola, Isola d'Elba. We are looking forward to an exceptional gathering where we can enjoy the beautiful location, have interesting scientific discussions about the state of the art, and initiate stimulating collaborations among electron-cloud key experts as well as with students and other scientists from neighbouring fields.

The meeting is sponsored by:
Istituto Nazionale di Fisica Nucleare (INFN)
CERN
EUCARD
ACCNET
LOW-ε-RING
Material
Go to day
  • Tuesday, 5 June 2012
    • 18:15 - 19:00 Electron Cloud Effects in Accelerators 45' ( Sala Maria Luisa )
      Speaker: Mr. Miguel Furman (LBNL (Lawrence Berkeley Natl. Lab.))
      Material: Slides powerpoint file}
    • 19:30 - 20:00 Welcome Cocktail by the pool
  • Wednesday, 6 June 2012
    • 08:30 - 10:30 I - ECE on Beam Dynamics: observations and prediction
      Convener: Mr. Miguel Furman (LBNL (Lawrence Berkeley Natl. Lab.))
      • 08:30 Electron-Cloud Effects in Past and Future Machines – Quick Walk through 50 Years of Electron-Cloud Studies 30'
        Speaker: FRANK ZIMMERMANN (CERN)
        Material: Slides powerpoint file}
      • 09:00 Observations and Predictions in LHC and SPS 30'
        Speaker: Dr. Giovanni Rumolo (CERN)
        Material: Slides powerpoint file}
      • 09:30 Electron Cloud Observations and Predictions at KEKB, PEP-II and SuperB Factories 30'
        Speaker: Dr. Hitoshi Fukuma (High Energy Accelerator Research Organization)
        Material: Slides pdf file}
      • 10:00 Observations and Predictions at CesrTA, and outlook for ILC 30'
        Speaker: Gerald Dugan (Cornell University)
        Material: Slides powerpoint file}
    • 10:30 - 11:00 Coffee Break
    • 11:00 - 13:00 II - ECE on Beam Dynamics: observations and prediction
      Convener: Mr. Miguel Furman (LBNL (Lawrence Berkeley Natl. Lab.))
      • 11:00 Observations and Predictions for DAFNE and SuperB 30'
        Speaker: Theo Demma (LAL)
        Material: Slides powerpoint file}
      • 11:30 Precision Simulations of the Electron Cloud (EC) in Fermilab Main Injector with VORPAL and Related Benchmarks 30'
        Speaker: Paul Lebrun (Fermilab)
        Material: Slides pdf file}
      • 12:00 Electron Cloud Effects in Proton and Ion Machines 30'
        Speaker: Mr. Fedor Petrov (Computational Electromagnetics Laboratory, Darmstadt University of Technology)
        Material: Slides pdf file}
      • 12:30 E-Cloud dependence on the Bunch Profile - An Experiment in the PS and an Extension to the LHC 20'
        Speaker: Dr. Chandrashekhara M Bhat Bhat (Fermilab/CERN)
        Material: Slides powerpoint file}
    • 13:00 - 16:00 Lunch Break - Fuoco di Bosco
    • 16:00 - 17:40 I - ECE Effects on Vacuum and Heat Load
      Convener: Dr. Elena Shaposhnikova (CERN)
      • 16:00 ECE's at LHC: Vacuum and Heat Load 30'
        Speaker: Dr. Vincent Baglin (CERN)
        Material: Slides powerpoint file}
      • 16:30 SuperKEKB Vacuum System & KEK Studies 30'
        Speaker: Dr. kyo shibata (High Energy Accelerator Research Organization (KEK))
        Material: Slides powerpoint file} pdf file}
      • 17:00 Beam Heat load in Superconducting Wigglers 20'
        Speaker: Dr. Sara Casalbuoni (KIT)
        Material: Slides pdf file}
      • 17:20 Benchmarking at LHC 20'
        Speaker: Mr. Octavio Dominguez (CERN)
        Material: Slides powerpoint file}
    • 17:40 - 18:00 Coffee Break
    • 18:00 - 19:00 II - ECE Effects on Vacuum and Heat Load
      Convener: Dr. Elena Shaposhnikova (CERN)
      • 18:00 Build-up & Heat-load Simulations - Benchmarking for LHC 20'
        Speaker: Mr. Humberto Maury Cuna (CINVESTAV)
        Material: Slides powerpoint file}
      • 18:20 Observations of Electron Cloud Phenomena at PETRA III 20'
        Speaker: Rainer Wanzenberg (DESY)
        Material: Paper unknown type filedown arrow Slides powerpoint file} pdf filedown arrow
      • 18:40 Chamber Surface Roughness and Electron Cloud for the APS SCU 20'
        Speaker: Ms. Laura Boon (Purdue University)
        Material: Slides pdf file}
  • Thursday, 7 June 2012
    • 08:30 - 10:20 I - Surface Properties, Coating and Experimental Studies
      Convener: Roberto Cimino (LNF)
      • 08:30 The Chemical origin of Sey at Technical Surfaces 30'
        Speaker: Dr. Rosanna Larciprete (CNR-ISC/LNF-INFN)
        Material: Slides pdf file}
      • 09:00 Soft X-ray Reflectivity from Quasi-Perfect Mirros to Accelerator Walls 30'
        Speaker: Dr. Franz Schaefers (Helmholtz Zentrum Berlin)
        Material: Slides pdf file}
      • 09:30 Photo Reflectivity Simulations 20'
        Speaker: Gerald Dugan (Cornell University)
        Material: Slides powerpoint file}
      • 09:50 Studies at BINP 30'
        Speaker: Alexander Krasnov (BINP)
        Material: Slides powerpoint file}
    • 10:20 - 10:50 Coffee Break
    • 10:50 - 13:10 II - Surface Properties, Coating and Experimental Studies
      Convener: Roberto Cimino (LNF)
      • 10:50 ONERA/CNES - Simulation Model and Measurements for SEY 30'
        Speaker: Mr. Mohamed Belhaj (ONERA)
      • 11:20 Carbon Coating of SPS Dipole Chambers 20'
        Speaker: Pedro Costa Pinto (CERN)
        Material: Slides powerpoint file} pdf file}
      • 11:40 Study of SEY Degradation of Amorphous Carbon Coatings 20'
        Speaker: Nenad Bundaleski (CeFiTec)
        Material: Slides powerpoint file}
      • 12:00 Novel Types of Anti-eCloud Surfaces 30'
        Speaker: Prof. ISABEL MONTERO (ICMM-CSIC)
        Material: Slides pdf file}
      • 12:30 Experimental Studies of Stable Confined Electron Clouds usign Gabor Lenses 20'
        Speaker: Dr. Oliver Meusel (Institute for applied Physics / University Frankfurt)
        Material: Poster pdf file} Slides pdf file}
      • 12:50 XPS and SEY Measurements Upon Scrubbing at Different Electron Kinetic Energies: the Case of TiN 20'
        Speaker: Dr. Roberto Flammini (CNR-IMIP/LNF-INFN)
        Material: Slides powerpoint file}
    • 13:10 - 15:10 Lunch Break - Fuoco di Bosco
    • 15:10 - 16:50 I - Multipactoring and Related Effects
      Convener: Dr. Mauro Pivi (SLAC)
      • 15:10 Secondary Electron Emission in the Limit of Low Energy Phusics Acceleratos 20'
        Speaker: Dr. Igor Kaganovich (PPPL)
        Material: Slides powerpoint file}
      • 15:30 Multipactoring in High Power RF devices on Satellites 20'
        Speaker: Prof. Gimeno Martinez Benito (University of Valencia)
        Material: Slides powerpoint file} pdf file}
      • 15:50 Multipactoring Activities at VALspace/Valencia 30'
        Speaker: Prof. Gimeno Martinez Benito (University of Valencia)
        Material: Slides pdf file}
      • 16:20 Incoming and Outgoing Electrons in Spacecraft Charging 30'
        Speaker: Dr. Shu Lai (Massachusetts Institute of Technology)
        Material: Slides pdf file}
    • 16:50 - 17:20 Coffee Break
    • 17:20 - 18:30 II - Multipactoring and Related Effects
      Convener: Dr. Mauro Pivi (SLAC)
      • 17:20 SPS Dipole Multipactor Test and TE Wave Diagnostics 20'
        Speaker: Dr. Fritz Caspers (CERN)
        Material: Slides powerpoint file}
      • 17:40 Modeling Interaction of e-cloud & Microwaves 20'
        Speaker: Dr. Michael Mattes (EPFL-STI-IEL-LEMA)
        Material: Slides pdf file}
      • 18:00 TE Wave Measurement and Modeling 30'
        Speaker: Mr. John Sikora (Cornell University (CLASSE))
        Material: Slides pdf file}
    • 18:45 - 19:45 Football Match - ECE Theory vs ECE Experiment
    • 20:30 - 20:45 Social Dinner - Fuoco di Bosco
  • Friday, 8 June 2012
    • 08:30 - 10:40 I - Simulations and Diagnostics
      Convener: Dr. Giovanni Rumolo (CERN)
      • 08:30 Py-Ecloud and Build Up Simulations at CERN 25'
        Speaker: Mr. Giovanni Iadarola (CERN - Università di Napoli Federico II)
        Material: Slides powerpoint file}
      • 08:55 Synchronous Phase Shift at LHC 25'
        Speaker: Mr. Juan Federico Esteban Müller (CERN)
        Material: Slides pdf file}
      • 09:20 Instabilities Simulations with Wideband Feedback Systems: CMAD, HEADTAIL, WARP 25'
        Speaker: Dr. Kevin Li (CERN)
        Material: Slides pdf file}
      • 09:45 Benchmarking of Instability Simulations at LHC 25'
        Speaker: Mr. Hannes Bartosik (CERN)
        Material: Slides powerpoint file}
      • 10:10 ECE Codes & Simulations at KEK 30'
        Speaker: Dr. Kazuhito Ohmi ohmi (KEK)
        Material: Slides powerpoint file} pdf file}
    • 10:40 - 11:10 Coffee Break
    • 11:10 - 13:00 II - Simulations and Diagnostics
      Convener: Dr. Giovanni Rumolo (CERN)
      • 11:10 Incoherent Beam Effects 30'
        Speaker: Dr. Giuliano Franchetti (GSI)
        Material: Slides pdf file}
      • 11:40 A Mapping Approach to the Electron Cloud for LHC 20'
        Speaker: Theo Demma (LAL)
        Material: Slides powerpoint file}
      • 12:00 Electron Cloud Observations at the ISIS Proton Synchrotron 20'
        Speaker: Mr. Alex Pertica (STFC - RAL - ISIS)
        Material: Slides pdf file}
      • 12:20 Refined analysis of Electron-Cloud Blow-up data at CesrTA Using Coded Aperture 20'
        Speaker: Dr. John Flanagan (KEK)
        Material: Slides powerpoint file}
      • 12:40 Electron Cloud Buildup Characterization Using TIme-Resolved Shielded Pickup Masurements and Custum Modeling Code 20'
        Speaker: James Crittenden (Cornell University)
        Material: Slides presentation file} pdf file}
    • 13:00 - 16:00 Lunch Break - Fuoco di Bosco
    • 16:00 - 18:00 I - Mitigation
      Convener: Gerald Dugan (Cornell University)
      • 16:00 Mitigation Strategy: Overview, including LHC and ILC 30'
        Speaker: Dr. Mauro Pivi (SLAC)
        Material: Slides pdf file}
      • 16:30 Mitigation Strategy at CERN 30'
        Speaker: Dr. JOSE MIGUEL JIMENEZ (CERN)
        Material: Slides powerpoint file}
      • 17:00 In-Situ Coating Technology 30'
        Speaker: Dr. Ady Hershcovitch (BNL)
        Material: Slides powerpoint file}
      • 17:30 Overview of EC-Instability Control Using Feedbacks 30'
        Speaker: Prof. John Fox (SLAC)
        Material: Slides unknown type filedown arrow pdf file}
    • 18:00 - 18:20 Coffee Break
    • 18:20 - 19:30 II - Mitigation
      Convener: Gerald Dugan (Cornell University)
      • 18:20 Development of Transverse Feedbacks Against ECE at SPS and LHC 20'
        Speaker: Dr. Wolfgang Hofle (CERN)
        Material: Slides powerpoint file}
      • 18:40 Operating Experience with Electron Cloud Clearing Electrodes at DAFNE 20'
        Speaker: Mikhail Zobov (LNF)
        Material: Slides powerpoint file}
      • 19:00 Conclusions 30'
        Speakers: Roberto Cimino (LNF), FRANK ZIMMERMANN (CERN)
        Material: Slides powerpoint file}