ECLOUD'18

Europe/Rome
Italy, La Biodola Bay, Isola d'Elba

Italy, La Biodola Bay, Isola d'Elba

<a target="_blank" href=http://www.elba4star.it/HH/index-Eng.html>Hotel Hermitage</a> </br>e-mail: <a href="mailto:ecloud2018@lists.lnf.infn.it"> ecloud2018@lists.lnf.infn.it
Frank Zimmermann (CERN), Roberto Cimino (LNF)
Description

The sixth electron-cloud workshop, ECLOUD'18, will take place from 3 to 7 June, 2018 at La Biodola (Isola d'Elba) Italy. The existence of the electron-cloud effects (ECE’s) has been firmly established experimentally at essentially all modern positron and hadron storage rings, either via performance limitations or by deliberate provocation. The ECE is a consequence of the strong coupling between a positively 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, additional heat load on the vacuum chamber walls, and interference with certain types of beam diagnostics.

Electron-cloud effects remain dynamical phenomena which are only incompletely understood. While the fundamental mechanisms are well recognized and the qualitative picture is clear, the phenomena involve many surface properties and geometrical parameters of the vacuum chamber coupled in a nontrivial way with the beam characteristics. The ECE can also conspire with classical wake-field effects and/or the beam-beam interaction. 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 great uncertainty.

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. Especially for multi-carrier signals, they exhibit very similar characteristics and electron-cloud build-up time scales, and can be modelled by similar simulation tools.

Since the last successful workshop ECLOUD’12, which also took place in La Biodola (Isola d'Elba) Italy, 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.

Electron cloud remains a major concern for the High Luminosity LHC and even for the actual LHC run 2. At CERN and worldwide a significant effort is also dedicated to the study of Future Circular Collider (FCC) options – involving both proton and electron-positron colliders which may suffer from electron cloud. As a consequence of the high synchrotron radiation, large bunch charge, and close bunch spacing in several of the FCC machines, the ECE’s are expected to be significant. It is urgent to better quantify and understand the associated phenomena to ascertain the feasibility of the performance goals. ECE’s have been noticeable during the first commissioning run of SuperKEKB in 2016. The next commissioning run from early 2018 onward will further raise the beam intensity.

The ECLOUD'18 workshop will be a timely meeting at which to present, discuss, and compare many recent and new electron-cloud observations at the LHC, SuperKEKB, CESR-TA and DAFNE, electron cloud predictions for FAIR, NICA and for the FCC.  The ECLOUD’18 workshop will also showcase and examine electron-cloud mitigation measures, such as clearing electrodes, graphite/carbon coatings, and chemically or laser treated surfaces, along with the 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'18 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 existing, upgraded and future machines.
 
ECLOUD'18 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
EuroCirCol

ARIES-APEC

 

 
Participants
  • adrian hannah
  • Ady Hershcovitch
  • Alessandro Drago
  • Andrea Ghigo
  • Andrea Liedl
  • Andrea Mostacci
  • Annalisa Romano
  • Benjamin Bradu
  • Benoit Salvant
  • Bernard Henrist
  • Bhagat-Taaj Sian
  • Catia Milardi
  • Christina Yin Vallgren
  • Daria Astapovych
  • Elena Buratin
  • Eleonora Belli
  • Eliana La Francesca
  • FRANK ZIMMERMANN
  • Gerardo Guillermo
  • Gimeno Martinez Benito
  • Giovanni Iadarola
  • Giovanni Rumolo
  • Igor Kaganovich
  • Isabel Montero
  • James Crittenden
  • Jean-Luc Vay
  • Jonathan SMITH
  • Katrin Isabell Thoma
  • kazuhito ohmi
  • Luca Sabato
  • Lucia Lilli
  • Luis Antonio Gonzalez Gomez
  • Luisa Spallino
  • MAKOTO TOBIYAMA
  • Marco Angelucci
  • Maria Rita Ferrazza
  • Maria Rosaria Masullo
  • Martina Azzolini
  • Mauro Taborelli
  • Mirko Simeoni
  • Mohamed Belhaj
  • MU-LEE YAO
  • Nasrin Nasresfahani
  • Oleg Malyshev
  • Pedro Costa Pinto
  • Philipp Dijkstal
  • Rafael Estrada
  • Rainer Wanzenberg
  • reza valizadeh
  • Roberto Cimino
  • Rosanna Larciprete
  • Rémi Dupuy
  • Sandro Mengali
  • Sergey Antipov
  • Shenghua Liu
  • Stephen Poprocki
  • SUHEYLA BILGEN
  • Valentine Petit
  • Vincent Baglin
  • Vinicio Tullio
  • Virginia Britten
  • Vittorio Giorgio Vaccaro
  • Xiaofeng Gu
  • Yusuke Suetsugu
    • 18:15 19:00
      Electron cloud effects (ECEs) in accelerators 45m Sala Maria Luisa, Hotel Hermitage, chaired by Roberto Cimino

      Sala Maria Luisa, Hotel Hermitage, chaired by Roberto Cimino

      Speaker: FRANK ZIMMERMANN (CERN)
      Slides
    • 19:00 21:00
      Welcome party and dinner 2h On the garden after the swimming pools, Hotel Hermitage

      On the garden after the swimming pools, Hotel Hermitage

    • 08:30 10:20
      ECE on Beam Dynamics: observations and prediction (I) Sala Maria Luisa (SML), Hotel Hermitage

      Sala Maria Luisa (SML), Hotel Hermitage

      Convener: FRANK ZIMMERMANN (CERN)
      • 08:30
        E-cloud Effects in CERN accelerator Complex 30m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Dr Giovanni Rumolo (CERN)
        Slides
      • 09:00
        Coupled-bunch instabilities and related effects due to electron cloud in SuperKEKB LER 30m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Dr MAKOTO TOBIYAMA (KEK Accelerator Laboratory)
        Slides
      • 09:30
        E-cloud observations and simulation at J-PARC 30m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Dr kazuhito ohmi (KEK)
        Slides
      • 10:00
        Positron vs electron Beam behavior at PETRA 20m SML, Hotel hermitage

        SML, Hotel hermitage

        Speaker: Rainer Wanzenberg (DESY)
        Minutes
        Slides
    • 10:20 10:50
      Coffee break 30m Parking Area, Hotel Hermitage

      Parking Area, Hotel Hermitage

    • 10:50 13:00
      ECE on Beam Dynamics: observations and prediction (II) Sala Maria Luisa (SML), Hotel Hermitage

      Sala Maria Luisa (SML), Hotel Hermitage

      Convener: Dr Giovanni Iadarola (CERN)
      • 10:50
        Measurements and simulations of electron-cloud-induced tune shifts and emittance growth at CesrTA 30m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Dr Stephen Poprocki (Cornell University)
        Slides
      • 11:20
        RHIC instabilities at transition crossing (su) 30m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Xiaofeng Gu (Brookhaven National Lab)
        Slides
      • 11:50
        Electron cloud challenges for future circular machines 30m SML, Hotel hermitage

        SML, Hotel hermitage

        Speaker: Lotta Mether (EPFL)
      • 12:20
        Investigating the role of photoemission in the e-cloud formation at the LHC 20m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Mr Philipp Dijkstal (Paul Scherrer Institut)
        Slides
      • 12:40
        E-cloud studies for FCC-hh 20m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Ms Daria Astapovych (TU Darmstadt)
        Slides
    • 13:00 15:50
      Lunch break 2h 50m Fuoco di Bosco, Hotel Hermitage

      Fuoco di Bosco, Hotel Hermitage

    • 15:50 17:40
      ECE effects on vacuum and heat load (I) Sala Maria Luisa (SML), Hotel Hermitage

      Sala Maria Luisa (SML), Hotel Hermitage

      Convener: Dr Giovanni Rumolo (CERN)
      • 15:50
        An overview on heat loads in the LHC 30m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Dr Giovanni Iadarola (CERN)
        Slides
      • 16:20
        Effect of synchrotron radiation and chamber properties on LHC electron-cloud heat load 20m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Mr Gerardo Guillermo (CERN (BE))
        Slides
      • 16:40
        Electron cloud build up in two-beam regions for HL-LHC, heat load and vacuum aspects 20m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Ms Annalisa Romano (CERN)
        Slides
      • 17:20
        How does a cryogenic system cope with e-cloud induced heat load? what can we learn from heat load measurements (including evolution, transients, etc)? 20m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Mr Benjamin Bradu (CERN)
        Slides
    • 17:40 18:00
      Coffee break 20m Parking Area, Hotel Hermitage

      Parking Area, Hotel Hermitage

    • 18:00 19:30
      ECE Effects on Vacuum and heat load (II) Sala Maria Luisa (SML), Hotel Hermitage

      Sala Maria Luisa (SML), Hotel Hermitage

      Convener: Maria Rosaria Masullo (NA)
      • 18:00
        Impedance issues in ECE research 30m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Benoit Salvant (CERN)
        Slides
      • 18:30
        Experimental challenge in linear and circular accelerators driven by impedance issues 20m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Prof. Andrea Mostacci (Sapienza)
        Slides
      • 18:50
        SubTHz EM characterization of coated material 20m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Vittorio Giorgio Vaccaro (NA)
        Slides
      • 19:10
        Instability caused by e-cloud in combined function magnets: the FERMILAB experience 20m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Dr Sergey Antipov (CERN)
        Slides
    • 20:00 22:00
      Dinner 2h Hotel Hermitage restaurant

      Hotel Hermitage restaurant

    • 08:30 10:30
      Surface properties, coating and experimental studies (I) SML, Hotel Hermitage

      SML, Hotel Hermitage

      Convener: Dr Rosanna Larciprete (CNR-ISC/LNF-INFN)
      • 08:30
        SEY: what we know and what we still need to know 30m
        Speaker: Dr Mauro Taborelli (CERN)
        Slides
      • 09:00
        SEY measurements of coated surfaces with different coating thickness 20m
        Speaker: Eleonora Belli (ROMA1)
        Slides
      • 09:20
        Characterisation of beam screens extracted from LHC magnets 20m
        Speaker: Mrs Valentine Petit (CERN)
        Slides
      • 09:40
        SEY studies at CSNS 20m
        Speaker: Ms Shenghua Liu (Institute of High Energy Physics,Chinese Academy of Sciences)
        Slides
      • 10:00
        Stainless Steel SEY: A controversial story 10m
        Speaker: Roberto Cimino (LNF)
        Slides
      • 10:10
        SEY from noble metals 10m
        Speaker: Luis Antonio Gonzalez Gomez (LNF)
        Slides
      • 10:20
        SEY from the LASE surfaces with and without absorbed gases at cryogenic temperatures 10m
        Speaker: Mr Bhagat-Taaj Sian (STFC)
        Slides
    • 10:30 11:00
      Coffee break 30m Parking Area, Hotel Hermitage

      Parking Area, Hotel Hermitage

    • 11:00 13:00
      Surface properties, coating and experimental studies (II) SML, Hotel Hermitage

      SML, Hotel Hermitage

      Convener: Dr Mauro Taborelli (CERN)
      • 11:00
        A surface Science approach to SEY studies 20m
        Speaker: Dr Rosanna Larciprete (CNR-ISC/LNF-INFN)
        Slides
      • 11:20
        Photo reflectivity and PEY of technical surfaces 20m
        Speaker: Andrea Liedl (LNF)
        Slides
      • 11:40
        Photons Interaction with technical surfaces 20m
        Speaker: Marco Angelucci (LNF)
        Slides
      • 12:00
        Low SEY surface modelling with VSim’ 20m
        Speaker: Dr Jonathan SMITH (Tech-X UK Ltd)
        Slides
      • 12:20
        MC Simulation of SEY for Noble metals 20m
        Speaker: Martina Azzolini (ECT* -FBK-Universita' degli studi di Trento)
        Slides
      • 12:40
        Low-secondary electron emission coatings for ESA´s Galileo 20m
        Speaker: Prof. ISABEL MONTERO (ICMM-CSIC)
    • 13:00 15:00
      Lunch break 2h Fuoco di Bosco, Hotel Hermitage

      Fuoco di Bosco, Hotel Hermitage

    • 15:00 16:50
      Multipactoring and related effects SML, Hotel Hermitage

      SML, Hotel Hermitage

      Convener: Dr Vincent Baglin (CERN)
      • 15:00
        SEY properties in Plasma research, modelling and measurements 30m
        Speaker: Dr Igor Kaganovich (PPPL)
        Slides
      • 15:30
        Recent advances on multipactor effect in satellites comunications RF 20m
        Speaker: Prof. Gimeno Martinez Benito (University of Valencia)
        Slides
      • 15:50
        SEY properties of dielectric materials, modelling and measurements 20m
        Speaker: Mr Mohamed Belhaj (ONERA)
        Slides
      • 16:10
        Experiments with stable confined electron columns 20m
        Speaker: Ms Katrin Isabell Thoma (Goethe Universität Frankfurt)
        Slides
      • 16:30
        Multipactoring in the RF structures 20m
        Speaker: Dr Nasrin Nasresfahani (CERN)
        Slides
    • 16:50 17:10
      Coffee break 20m Parking Area, Hotel Hermitage

      Parking Area, Hotel Hermitage

    • 17:10 18:40
      Electron and photon interaction with low temperature surfaces SML, Hotel Hermitage

      SML, Hotel Hermitage

      Convener: Lotta Mether (EPFL)
      • 17:10
        SR interaction with cryosorbed layers 30m
        Speaker: Mr Rémi Dupuy (LERMA (Sorbonne Université, Obs. Paris))
        Slides
      • 17:40
        SEY and other material properties studies at cryogenic temperatures 20m
        Speaker: Luisa Spallino (LNF)
        Slides
      • 18:00
        Characterisation of technical surfaces at cryogenic temperature under electron bombardment 20m
        Speaker: Mr Bernard Henrist (CERN)
        Slides
      • 18:20
        Coldex: A tool to study cold surfaces in Accelerators 20m
        Speaker: Dr Vincent Baglin (CERN)
        Slides
    • 19:00 20:00
      Football match ECE Theory vs ECE Experiment 1h Soccer field, Hotel Hermitage

      Soccer field, Hotel Hermitage

    • 20:30 23:30
      Social dinner and dance 3h Restaurant Maitù

      Restaurant Maitù

    • 09:00 10:30
      Simulations and diagnostics (I) SML, Hotel Hermitage

      SML, Hotel Hermitage

      Convener: James Crittenden (Cornell University)
      • 09:00
        Progress with 3D modelling of beam dynamics in presence of electron cloud 30m
        Speaker: Jean-Luc Vay (Berkeley Lab)
        Slides
      • 09:30
        Post-ecloud regime, challenges for multi-species simulations in beam dynamics 30m
        Speaker: Lotta Mether (EPFL)
      • 10:00
        A global view on electron cloud instability simulations in the LHC and HL-LHC 30m
        Speaker: Ms Annalisa Romano (CERN)
        Slides
    • 10:30 11:00
      Coffee break 30m Parking Area, Hotel Hermitage

      Parking Area, Hotel Hermitage

    • 11:00 13:00
      Simulations and diagnostics (II)
      Convener: Dr MAKOTO TOBIYAMA (KEK Accelerator Laboratory)
      • 11:00
        E-cloud challenges at SuperKEKB and future colliders 30m
        Speaker: Dr kazuhito ohmi (KEK)
        Slides
      • 11:30
        Simulations of synchrotron-radiation-induced electron production in the CESR vacuum chamber wall 30m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: James Crittenden (Cornell University)
        Slides
      • 12:00
        Secondary Emission Models in e-cloud buildup simulations: from the lab to the code 20m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Dr Luca Sabato (CERN)
        Slides
      • 12:20
        Preliminary results obtained with the LHC Vacuum Pilot Sector 20m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Ms Elena Buratin (CERN)
        Slides
      • 12:40
        DAFNE&ecloud: observations and prospective 20m SML, Hotel Hermitage

        SML, Hotel Hermitage

        Speaker: Catia Milardi (LNF)
        Slides
    • 13:00 15:50
      Lunch break 2h 50m Fuoco di Bosco, Hotel Hermitage

      Fuoco di Bosco, Hotel Hermitage

    • 15:50 17:20
      Mitigation (I) SML, Hotel Hermitage

      SML, Hotel Hermitage

      Convener: Dr kazuhito ohmi (KEK)
      • 15:50
        ECE and its cures in the SuperKEKB positron ring 30m
        Speaker: Dr Yusuke Suetsugu (High Energy Accelerator Research Organization (KEK))
        Slides
      • 16:20
        SEY lowering with a-C coating in SPS and LHC 20m
        Speaker: Pedro Costa Pinto (CERN)
        Slides
      • 16:40
        Laser Ablated Surface Engineering (LASE) for e-cloud mitigation: from discovery to machine application 20m
        Speaker: Dr reza valizadeh (ASTeC, STFC)
        Slides
      • 17:00
        Low SEY LASE and NEG coated surfaces and their surface resistance, vacuum properties and particulate generation’ 20m
        Speaker: Dr Oleg Malyshev (STFC Daresbury Laboratory)
        Slides
    • 17:20 17:40
      Coffee break 20m Parking Area, Hotel Hermitage

      Parking Area, Hotel Hermitage

    • 17:40 18:40
      Mitigation (II) SML, Hotel Hermitage

      SML, Hotel Hermitage

      Convener: Dr Oleg Malyshev (STFC Daresbury Laboratory)
      • 17:40
        SEY, pumping properties and surface resistance of new high electric conductivity NEG coating’ 20m
        Speaker: Mr adrian hannah (STFC ASTeC)
        Slides
      • 18:00
        In-situ coating and scrubbing of long narrow beam pipes for eliminating electron clouds and reducing vacuum wall RF resistivity 20m
        Speaker: Dr Ady Hershcovitch (BNL)
        Slides
      • 18:20
        Intrabunch feedback system development at Dafne 20m
        Speaker: Alessandro Drago (LNF)
        Slides
    • 18:40 19:20
      Outlook and conclusion SML, Hotel Hermitage

      SML, Hotel Hermitage

      Convener: Andrea Ghigo (LNF)
      • 18:40
        ECLOUD18 Summary and Outlook 20m Sala Elena, Hotel Hermitage

        Sala Elena, Hotel Hermitage

        <a target="_blank" href=http://www.elba4star.it/HH/index-Eng.html>Hotel Hermitage</a> </br>e-mail: <a href="mailto:ecloud18@lists.lnf.infn.it"> ecloud18@lists.lnf.infn.it
        Speaker: FRANK ZIMMERMANN (CERN)
      • 19:00
        ECLOUD18 Closing remarks 20m Sala Elena, Hotel Hermitage

        Sala Elena, Hotel Hermitage

        <a target="_blank" href=http://www.elba4star.it/HH/index-Eng.html>Hotel Hermitage</a> </br>e-mail: <a href="mailto:ecloud18@lists.lnf.infn.it"> ecloud18@lists.lnf.infn.it
        Speaker: Roberto Cimino (LNF)
        Slides
    • 20:00 22:00
      Dinner 2h Hotel Hermitage restaurant

      Hotel Hermitage restaurant

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