3rd International Workshop on Mechanisms of Vacuum Arcs (MeVArc 2012)

US/Mountain
Hotel Albuquerque at Old Town

Hotel Albuquerque at Old Town

800 Rio Grande Blvd., NW Albuquerque, New Mexico 87104 United States
André Anders (Lawrence Berkeley National Laboratory), Flyura Djurabekova (University of Helsinki), Matthew Hopkins (Sandia National Laboratories), Walter Wuensch (CERN)
Description
Vacuum arcs are a concern in essentially every vacuum electronic device. Sometimes they form the basis for device operation, but all too often they are the primary failure mode. They are often described as high voltage breakdown (HVB) and electrostatic discharge (ESD) as well. The purpose of this workshop is to bring together scientists and engineers to discuss the latest improvements in our understanding of vacuum arcs, including their initiation and evolution.

Specific topics include:
  • High electric field gradient devices (e.g., accelerators)
  • Effect of electrode material processing
  • Material/electrode damage characterization
  • Primary mechanisms for discharge
  • Diagnostic methods for interrogating breakdown, surface structure, plasma constituents, etc.
  • Modeling and simulation
We welcome new areas of investigation in addition to the above. The multidisciplinary nature of vacuum arcs and vacuum devices provides a rich environment for finding physics of shared interest from multiple sources.

Workshop website:
http://www.regonline.com/builder/site/default.aspx?EventID=1065351
    • 08:00 10:00
      Registration 2h
    • 10:00 12:00
      Welcome reception 2h
    • 01:00 01:45
    • 01:45 02:00
      Sensitivity of vacuum arc simulations and challenges to reproducibility. 15m
      Speaker: Paul Crozier (SNL)
      Slides
    • 02:30 03:00
      Multipactor saturation in rectangular waveguides 30m
      Speaker: Peter Stoltz (Tech-X corp.)
      Slides
    • 03:00 03:30
      ArcPIC 2D: Simulating arc ignition 30m
      Speakers: Kyrre Ness Sjoebaek (University of Oslo (NO)), Lotta Maria Mether (U)
    • 03:30 04:00
      The influence of field emission on breakdown and Townsend discharges in microscale gaps. 30m
      Speaker: Paul Rumbach (University of Notre Dame)
      Slides
    • 05:30 06:00
      Revisiting Paschen: Breakdown voltage calculations using PIC-DSMC 30m
      Speaker: Chris Moore (SNL)
      Slides
    • 06:00 06:45
      Atomistic approach to the initiation of vacuum arcs near metal surfaces. Update from ISDEIV. 45m
      Speaker: Flyura Djurabekova (University of Helsinki)
      Slides
    • 07:15 07:45
      Atomistic simulations of field evaporation in atom probe tomography. 30m
      Speaker: Stefan Parviainen (University of Helsinki)
      Slides
    • 07:45 08:15
      Thermal and electrical modeling of micro meter sized protrusions in high gradient accelerating structures. 30m
      Speaker: Keser Aydin (University of Maryland)
      Slides
    • 08:15 09:00
      Overview of the Z machine: From fusion to planetary science 45m
      Speaker: Thomas Mattsson (SNL)
      Slides
    • 10:30 13:00
      Workshop Dinner 2h 30m Church street café

      Church street café

    • 09:00 09:30
      Recent high gradient experiments at SLAC. 30m
      Speaker: Dr Valery Dolgashev (SLAC)
      Slides
    • 09:30 10:00
      Interrogating vacuum arc physics with advanced diagnostic methods. 30m
      Speaker: Ed Barnat (SNL)
      Slides
    • 10:30 11:00
      Scanning Electron Microscope (SEM) in situ field emission measurement in Uppsala Univ. 30m
      Speaker: Tomoko Muranaka (CERN)
      Slides
    • 11:00 11:30
      Search for field emission enhanced location on the electrode. 30m
      Speaker: Yasuo Higashi (KEK)
      Slides
    • 11:30 12:00
      Surface roughness and field emission measurements on diamond turned Cu samples. 30m
      Speaker: Lagotzky Stefan (Berg. Universität Wuppertal)
      Slides
    • 13:30 14:00
      Advanced interpretation of wormlike features in CLIC accelerating cavities. 30m
      Speaker: Markus Aicheler (Ruhr-Universitaet Bochum)
      Slides
    • 14:00 14:30
      Update of the current experimental work on breakdowns in the CLIC DC spark systems. 30m
      Speaker: Nicholas Shipman (University of Manchester (GB))
      Slides
    • 14:30 15:00
      Wrap-up 30m