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VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260524T094911Z
UID:https://www.ipp.mpg.de/events/41820/5593462
DTSTART:20250523T070000Z
DTEND:20250523T080000Z
CLASS:PUBLIC
CREATED:20250512T113307Z
DESCRIPTION:This tutorial-style presentation will begin with a brief review
  of basic sheath physics and thesheath boundary conditions for low frequen
 cy turbulence simulations. A few consequences ofsheaths for scrape-off lay
 er (SOL) instabilities will then be discussed using analytical models topr
 ovide insight. Using a scaling correspondence between linear instabilities
  and turbulentstructures\, semi-quantitative sheath-related propagation re
 gimes of blob-filaments will bediscussed and compared with experimental me
 asurements. Turning to RF sheaths\, afterreviewing the physics of RF recti
 fication\, thermal sheath boundary conditions are generalized todescribe t
 he effect of RF-driven sheaths on low frequency turbulence. ICRF-driven sh
 eathstypically have much higher sheath potentials than their thermal sheat
 h counterparts. Recentwork using the Hermes turbulence code to model ICRF 
 driven convection and changes in theSOL density profile will be summarized
 . In this work the importance of 3D geometry for themodeling is emphasized
 . Convective cells near an antenna are shown to influence the transportof 
 impurity ions that originate from RF-induced sputtering. Finally\, some co
 mments\,speculations and challenges for modeling grazing magnetic angle sh
 eaths will be presented.\nVortragende(r): Jim Myra
LAST-MODIFIED:20250512T114634Z
LOCATION:IPP L5\, Raum: L5 Seminar room
SUMMARY:TOK Seminar: Thermal and RF sheath boundary conditions for low freq
 uency turbulence and blob-filaments
URL;VALUE=URI:https://www.ipp.mpg.de/events/41820/5593462
END:VEVENT
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