13th International Workshop on Plasma Edge Theory in Fusion Devices

The 13th International Workshop on Plasma Edge Theory in Fusion Devices was organized by Lawrence Livermore National Laboratory (LLNL), with TechX Corporation and the U.S. Department of Energy Office of Fusion Energy Sciences as co-sponsors.

Like the twelve preceding workshops, this workshop addressed plasma theory of the edge region in magnetic confinement fusion devices. It reflected the present status of the theory for the boundary layer of fusion plasmas. The emphasis was on the development of theory and of appropriate numerical methods, with a secondary interest in self-consistent modeling of experimental data (including also empirical elements).

Event Information

Dates: September 19–21, 2011

Location: South Lake Tahoe, California, USA

Topics

The following topics were covered by invited and contributed lectures:

Basic edge plasma theory

Magnetic boundary structure including magnetic stochasticity
Sheath effects
Edge transport parallel and perpendicular to magnetic field
Electric field effects
Instabilities and turbulence
Neutrals and multi-ion theories, radiation
Plasma detachment including cold and dense buffer plasmas
New edge-relevant numerical and computational methods

Models of special phenomena and edge control

Hot spots, radiative cooling
L-H transition, blobs, ELMs (including control), and pedestal structure
Flow patterns, momentum transport, and impurity retention
Biasing and shaping of targets
Dusty effects

Integrated edge plasma modelling

Kinetic and Monte Carlo codes
Multi-fluid codes
Effects of plasma edge/core coupling
Validation of edge plasma theories

The workshop included invited lectures, oral presentations and poster contributions.

Invited Lectures

Name and affiliation	Title
John Cary (TechX Corp., USA)	"Integrated core-edge-wall simulations"
Atsushi Fukuyama (Kyoto University, Japan)	"Integrated modeling of core, edge and peripheral plasmas"
Ilon Joseph (Lawrence Livermore National Laboratory, USA)	"Mitigating ELMs"
Grisha Kagan (Los Alamos National Laboratory, USA)	"Neoclassical theory of pedestal flows and its comparison with C-Mod measurements"
Volker Naulin (Risø National Laboratory, Denmark)	"Profiles and fluctuations in edge turbulence simulations"
Sasha Pigarov (University of California San Diego, USA)	"Physics of plasma-wall interactions"
David Tskhakaya (Innsbruck University, Austria)	"On recent massively parallelized PIC simulations of the SOL"

There was a satellite workshop on the BOUT++ edge turbulence code on Sept. 14-16 at LLNL.

Agenda

Sunday 9/18: registration and reception, 7:30-9:30 PM

Time	Mon. 9/19	Tues. 9/20	Wed. 9/21
8:30 AM		Invited 3 Kagan	Invited 5 Fukuyama
8:45 AM	Opening Remarks
9:00 AM	Invited 1 Joseph
9:30 AM	Invited 1 Joseph	O-6 Xu	O-11 Yagi
10:00 AM	Coffee Break	O-7 Fundamenski	O-12 Zagorski
10:30 AM	O-1 Ryutov	Coffee Break	Coffee Break
10:30 AM	O-1 Ryutov	Coffee Break	Invited 6 Tskhakaya
11:00 AM	O-2 Snyder	Invited 4 Pigarov	Invited 6 Tskhakaya
11:30 AM	Lunch	Invited 4 Pigarov	Lunch
12:00 PM		Lunch
12:30 PM		Lunch
1:00 PM	Invited 2 Naulin	O-8 Smirnov	O-13 Chankin
1:30 PM	Invited 2 Naulin	O-9 Delzanno	O-14 Wieggers
2:00 PM	O-3 Ohno	O-10 Dekeyser	Poster 2 and Coffee
2:30 PM	O-4 Leerink	Free Time
3:00 PM	O-5 Rosato
3:30 PM	Coffee and Poster 1
4:00 PM			Summary/closing
4:30 PM
5:00 PM
5:30 PM
6:00 PM
6:30 PM
7:00 PM		Workshop Dinner
7:30 PM
8:00 PM
8:30 PM		Special Lecture Cary
9:00 PM		Special Lecture Cary

Oral presentations

#	Time	Lead author	Additional authors	Title
Monday (also in Monday poster session)
	8:45 AM			Opening remarks
I-1	9:00 AM	Ilon Joseph		Edge localized mode control using non-axisymmetric magnetic perturbations
O-1	10:30 AM	Dmitri Ryutov	R. Cohen, T. Rognlien, M. Umansky	Plasma convection near the magnetic null of a snowflake divertor
	10:00 AM	COFFEE BREAK
O-2	11:00 AM	Phil Snyder	R. Groebner, J. Hughes, T. Osborne, H. Wilson, X.Q. Xu	Developing and Testing a Predictive Model for the Pedestal Height and Width
	11:30 AM	LUNCH
I-2	1:00 PM	Volker Naulin		Profiles and fluctuations in edge turbulence simulations
O-3	2:00 PM	Noriyasu Ohno	H. Tanka, Y. Tsuji, S. Kajita	Statistical analysis of ejection property of plasma blobs from plasma column in the linear plasma device
O-4	2:30 PM	Susan Leerink	J.A. Heikkinen, S.J. Janhunen, T.P. Kiviniemi, T. Korpilo	Gyrokinetic simulations of turbulence and flows in limiter plasmas for midsized tokamaks
O-5	3:00 PM	Joel Rosato	A. Mekkaoui, Y. Marandet, D. Reitera, V. Kotova, H. Capes, L. Godbert-Mouret, M. Koubiti, R. Stamm	Modeling of radiation trasnport in fluctuating ede plasmas: a statistical approach
	3:30 PM	COFFEE BREAK AND POSTERS
Tuesday (also in Wednesday poster session)
I-3	8:30 AM	Grigory Kagan		Neoclassical theory of pedestal flows and its comparison with C-Mod measurements
O-6	9:30 AM	Xueqiao Xu	B. Dudson, I. Joseph, R. Groebner, P. Snyder, and R. Maingi	BOUT++simulations of H-mode pedestal of tokamak devices
O-7	10:00 AM	Wojtek Fundamenski	F. Militello, D. Moulton, D. McDonald	A model of the L-H transition in tokamaks
	10:30 AM	COFFEE BREAK
I-4	11:00 AM	Alexander Pigarov		Physics of plasma-wall interactions
	12:00 PM	LUNCH
O-8	1:00 PM	Roman Smirnov	S. Krasheninnikov, A. Pigarov, D. Mansfield, C. Skinner, A. Roquemore, T. Rognlien	Impurity seeding with dust injection in tokamak edge plasmas
O-9	1:30 PM	Gian Luca Delzanno	X. Tang	Dust in the divertor sheath: a problem or a possible solution?
O-10	2:00 PM	Wouter Dekeyser	M. Baelmans, D. Reiter	Divertor design through shape optimization
	2:30 PM	FREE TIME
	7:00 PM	WORKSHOP DINNER
SI-1	8:30 PM	John Cary		Integrated core-edge-wall simulations
Wednesday (also in Wednesday poster session)
I-5	8:30 AM	Atsushi Fukuyama		Integrated modeling of core, edge and peripheral plasmas
O-11	9:30 AM	Masatoshi Yagi	K. Shimizu, T. Takizuka, M. Honda, N. Hayashi, K. Hoshino, A. Fukuyama	Simulation study of L/H transition with self-consistent integrated modelling of core and SOL/divertor transport
O-12	10:00 AM	Roman Zagorski	R. Neu, and ASDEX Upgrade Team	Integrated Modelling of ASDEX Upgrade nitrogen seeded discharges
	10:30 AM	COFFEE BREAK
I-6	10:45 AM	David Tskhakaya		On recent massively parallelized PIC simulations of the SOL
O-13	1:00 PM	Alex Chankin	D.P. Coster, G. Meisl	Development and Benchmarking of a new Kinetic Code for Parallel Plasma Transport in the SOL and Divertor
O-14	1:30 PM	Rob Wieggers	H.J. de Blank, W.J. Goedheer	Non-linear parallel Monte Carlo simulations of neutral species in Pilot-PSI and Magnum-PSI
	2:00 PM	POSTERS AND COFFEE BREAK
	4:00 PM	Summary/closing

Poster presentations

#	Principal author	Additional authors	Title
Monday (also includes Mon. orals)
P1-1	Justin Angus	M. Umansky, S.I. Krasheninnikov	3D modeling of blobs with the BOUT++code
P1-2	Umur Daybelge	C. Yarim, A. Nicolai	Spatiotemporal Chaos in Rotation Profiles near Separatrix of Tokamak Plasma
P1-3	Brett Friedman	M.V. Umansky, T.A. Carter, P. Popovich	Status of plasma turbulence simulation studies in LAPD
P1-4	Yuki Homma	A. Hatayama	Test Simulations of the Kinetic Model for the Thermal Force based on the Monte Carlo Binary Collision Model
P1-5	Katsuhiro Hosoi	Y. Nakashima, S. Kobayshi, N. Nishino, T. Mizuuchi, T. Ishii, K. Ichimura, H. Takeda, and T. Imai	Modeling of SMBI experiments based on Monte-Carlo simulation in GAMMA 10
P1-6	Samad Mekkaoui	Y. Marandet, J. Rosato, D. Reiter, M. Koubiti, R. Stamm, H. Capes, L. Godbert-Mouret	Neutral Transport in SOL Plasma: Markovian Beta process to describe plasma density and temperature fluctuations
P1-7	Alexei Pankin	J. Callen, J. Cary, R. Cohen, R. Groebner, A. Hakim, S. Kruger, A. Pletzer, T. Rognlien, S. Shasharina, S. Vadlamani	Computational study of the neutral fuelling effect on the H-mode pedestal scalings
P1-8	Josef Seebacher	A. Kendl	Remarks on Fluid and Kinetic Thermal Forces for Plasma Edge Transport Codes
P1-9	Haruki Seto	A. Fukuyama	Formulation of two-dimensional transport in tokamak plasmas for integrated analysis of core and peripheral plasmas
P1-10	Yukihiro Tomita	G. Kawamura, M. Ueno, N. Ohno, Z.H. Huang, Y.D. Pan, and L.W. Yan	Electric field at plasma-facing wall for double electron temperature
P1-11	Masafumi Ueno	N. Ohno, Y. Tomita, G. Kawamura	Release condition of a metallic dust particle from plasma-facing wall
P1-12	S. Azuma	A. Fukuyama, T. Takizuka	Analysis of the Bohm criterion for two-ion-species plasmas using PARASOL
P1-13	Mikhail Dorf	R. Cohen, J. Compton, M. Dorr, T. Rognlien, J. Angus, S. Krasheninnikov, P. Colella, D. Martin, P. McCorquodale	Progress with the COGENT Edge Kinetic Code
P1-14	Jukka Heikkinen	S. Janhunen, T. Kiviniemi, T. Korpilo, and S. Leerink	Sensitivity of the pedestal characteristics to the SOL limiter model in gyrokinetic simulation
P1-15	Kazuo Hoshino	K. Shimiza, N. Asakura, T. Takizuka, M. Nakamura, K. Tobita	Simulation Study of an Extended Divertor Leg for Heat Control in SlimCS DEMO Reactor
P1-16	Johnny Lonnroth	P. Belo, M. Beurskens, G. Corrigan, D. Dodt, T. Eich, D. Hartin5, S. Jachmic6, C. Maggi, D.C. McDonald, V. Parail and JET EFDA contributors	Determination of edge boundary conditions in JET ELMY H-mode plasmas by means of EDGE2D modelling
P1-17	Frederic Schwander	G. Ciraolo, A. Paredes, E. Serre, Ph. Ghendrih, P. Tamain	Electron non-adiabaticity effects on parallel shear flow instability at the core/SOL transition
P1-18	Eric Serre	H. Bufferand, A. Paredes, F. Schwander, G. Chiavassa, G. Ciraolo, Ph. Ghendrih, L. Isoardi, P. Tamain	Numerical Modeling of turbulent transport at the edge
P1-19	Mitsunori Toma	X. Bonnin, K. Hoshino, A. Hatayama, R. Schneider, D. Coster	Development of coupled IMPGYRO-SOLPS codes for analyzing to tokamak plasmas with tungsten impurities
P1-20	Maxim Umansky	D. Brunner, B. LaBombard, T.D. Rognlien	Modeling of local edge plasma perturbations induced by a blased probe
Wednesday (also includes Tues. and Wed. orals)
P2-1	Tianyang Xia	X. Xu, J. Li	Nonlinear Simulations of Peeling-Ballooning Modes with Flow Shear and RF Sources
P2-2	Zehua Guo	X. Tang	Parallel transport of long mean-free-path plasma on open magnetic field lines
P2-3	Mohammed Koubiti	T. Nakano , H. Capes, Y. Marandet, S. Mekkaoui, J. Rosato, R. Stamm	Characterization of the divertor region during the formation of strong radiation in the JT-60Y tokamak
P2-4	Tom Rognlien	I. Joseph	A quasi-linear model of edge plasma transport from magnetic perturbations
P2-5	Eric Wang	J. Candy, R. Groebner, X. Xu	Gyrokinetic analysis of linear instabilities within the pedestal of experimental discharges
P2-6	Irina Berezina	I.V. Tsvetkov	Influence of the oblique magnetic field on surface sputtering and secondary electron emission
P2-7	Ron Cohen	M. Dorf, M. Dorr, W. Nevins, T. Rognlien	Reduced Electron Models for Kinetic Edge Simulation
P2-8	Aaron Froese	M. Laberge, S. Howard, M. Reynolds, D. Richardson, and GF team, D. Lee	Simulation of the Compression of a Magnetized Plasma with Liquid Metal
P2-9	Gakushi Kawamura	M. Kobayash1, Y. Tomita, S. Masuzaki, T. Morisaki, Y. Feng	Simulation modeling of plasma and neutral transport in closed divertor configuration of LHD
P2-10	Andrey Pshenov	D.Kh. Morozov	ELM as a trigger mechanism for the transition between two edge regimes
P2-11	Xianzhu Tang	Z. Guo	Transport-driven sheath instability in magnetic fusion plasmas
P2-12	Yukihiro Tomita	G. Kawamura, K. Kumazawa, Z.H. Huang, Y.D. Pan, L.W. Yan	Characteristics of dust particle injected into fusion plasma

Abstracts

Name	Title
Justin Angus	3D modeling of blobs with the BOUT++code
S. Azuma	Analysis of the Bohm criterion for two-ion-species plasmas using PARASOL
Benjamin Berberich	Mesh-Free Kinetic Simulations of the Plasma-Wall Transition Region
Irina Berezina	Influence of the oblique magnetic field on surface sputtering and secondary electron emission
Peter Beyer	Erosion of the edge transport barrier due to a magnetic curvature induced enhancement of transport associated with magnetic islands
John Cary	Integrated core-edge-wall simulations using FACETS
Alex Chankin	Development and Benchmarking of a new Kinetic Code for Parallel Plasma Transport in the SOL and Divertor
Ron Cohen	Reduced Electron Models for Kinetic Edge Simulation
Umur Daybelge	Spatiotemporal Chaos in Rotation Profiles near Separatrix of Tokamak Plasma
Wouter Dekeyser	Divertor design through shape optimization
Gian Luca Delzanno	Dust in the divertor sheath: a problem or a possible solution?
Mikhail Dorf	Progress with the COGENT Edge Kinetic Code
Brett Friedman	Status of plasma turbulence simulation studies in LAPD
Aaron Froese	Simulation of the Compression of a Magnetized Plasma with Liquid Metal
Atsushi Fukuyama	Integrated modeling of core, edge and peripheral plasmas
Wojtek Fundamenski	A model of the L-H transition in tokamaks
Zehua Guo	Parallel transport of long mean-free-path plasma on open magnetic field lines
Jukka Heikkinen	Sensitivity of the pedestal characteristics to the SOL limiter model in gyrokinetic simulation
Yuki Homma	Test Simulations of the Kinetic Model for the Thermal Force based on the Monte Carlo Binary Collision Model
Kazuo Hoshino	Simulation Study of an Extended Divertor Leg for Heat Control in SlimCS DEMO Reactor
Katsuhiro Hosoi	Modeling of SMBI experiments based on Monte-Carlo simulation in GAMMA 10
Ilon Joseph	Edge localized mode control using non-axisymmetric magnetic perturbations
Grigory Kagan	Neoclassical theory of pedestal flows and its comparison with C-Mod measurements
Gakushi Kawamura	Simulation modeling of plasma and neutral transport in closed divertor configuration of LHD
Mohammed Koubiti	Characterization of the divertor region during the formation of strong radiation in the JT-60Y tokamak
Susan Leerink	Gyrokinetic simulations of turbulence and flows in limiter plasmas for midsized tokamaks
Johnny Lonnroth	Determination of edge boundary conditions in JET ELMY H-mode plasmas by means of EDGE2D modelling
Samad Mekkaoui	Neutral Transport in SOL Plasma: Markovian Beta process to describe plasma density and temperature fluctuations
Volker Naulin	Profiles and fluctuations in edge and SOL turbulence
Noriyasu Ohno	Statistical analysis of ejection property of plasma blobs from plasma column in the linear plasma device
Kaoru Ohya	Long-distance transport of carbon and beryllium in an ITER edge plasma
Alexei Pankin	Computational study of the neutral fuelling effect on the H-mode pedestal scalings
Alexander Pigarov	Physics of plasma-wall interactions
Andrey Pshenov	ELM as a trigger mechanism for the transition between two edge regimes
Tom Rognlien	A quasi-linear model of edge plasma transport from magnetic perturbations
Joel Rosato	Modeling of radiation trasnport in fluctuating ede plasmas: a statistical approach
Dmitri Ryutov	Plasma convection near the magnetic null of a snowflake divertor
Frederic Schwander	Electron non-adiabaticity effects on parallel shear flow instability at the core/SOL transition
Josef Seebacher	Remarks on Fluid and Kinetic Thermal Forces for Plasma Edge Transport Codes
Eric Serre	Numerical Modeling of turbulent transport at the edge
Haruki Seto	Formulation of two-dimensional transport in tokamak plasmas for integrated analysis of core and peripheral plasmas
Roman Smirnov	Impurity seeding with dust injection in tokamak edge plasmas
Phil Snyder	Developing and Testing a Predictive Model for the Pedestal Height and Width
Xianzhu Tang	Transport-driven sheath instability in magnetic fusion plasmas
Mitsunori Toma	Development of coupled IMPGYRO-SOLPS codes for analyzing to tokamak plasmas with tungsten impurities
Yukihiro Tomita	Characteristics of dust particle injected into fusion plasma
Yukihiro Tomita	Electric field at plasma-facing wall for double electron temperature
David Tskhakaya	On recent massively parallelized PIC simulations of the SOL
Masafumi Ueno	Release condition of a metallic dust particle from plasma-facing wall
Maxim Umansky	Modeling of local edge plasma perturbations induced by a blased probe
Eric Wang	Gyrokinetic analysis of linear instabilities within the pedestal of experimental discharges
Rob Wieggers	Non-linear parallel Monte Carlo simulations of neutral species in Pilot-PSI and Magnum-PSI
Pengwei Xi	Influence of Equillibrium Perpendicular Shear Flow on Peeling-Balloning Instability
Tianyang Xia	Nonlinear Simulations of Peeling-Ballooning Modes with Flow Shear and RF Sources
Xueqiao Xu	BOUT++simulations of H-mode pedestal of tokamak devices
Masatoshi Yagi	Simulation study of L/H transition with self-consistent integrated modelling of core and SOL/divertor transport
Roman Zagorski	Integrated Modelling of ASDEX Upgrade nitrogen seeded discharges

Program

Session	Title	Author
Monday AM
	Experimental overview of ELM control using external magnetic perturbations	I. Joseph
	ELM control using external magnetic perturbations	I. Joseph
	Plasma convection near the magnetic null of a snowflake divertor	D.D. Ryutov
	Developing and Testing a Predictive Model for the Pedestal Height and Width (EPED)	P. Synder
Monday PM
	Profiles and fluctuations in edge and SOL turbulence	V. Naulin
	Statistical analysis of ejection property of plasma blobs from plasma column in the linear plasma device	N. Ohno
	Gyrokinetic simulations of turbulence and flows in limiter tokamaks	S.Leerink
	Progress on radiative transfer modeling in edge plasmas	J. Rosato
Tuesday AM
	Neoclassical Theory of Pedestal Flows	G. Kagan
	Dynamic Models for Plasma-Wall Interactions	A.Yu. Pigarov
	A new model of the L-H transition in tokamaks	W. Fundamenski
	BOUT++ simulations of H-mode pedestal of tokamak devices	X. Q. Xu
Tuesday PM
	Divertor Design through Shape Optimization	W. Dekeyser
	Dust motion in the divertor sheath	G. L. Delzanno
	Impurity seeding with dust injection in tokamak edge plasmas	R.D. Smirnov
Wednesday AM
	Integrated modeling of core, edge and peripheral plasmas	A. Fukuyama
	On recent massively parallelized PIC simulations of the SOL	D. Tskhakaya
	Simulation study of L/H transition with self-consistent integrated modelling of core and SOL/Divertor transport	M. Yagi
	Integrated Modelling of ASDEX Upgrade niitrogen seeded diischarges	R. Zagórski
Wednesday PM
	Development and Benchmarking of a new Kinetic Code for Parallel Plasma Transport in the SOL and Divertor	A. V. Chankin
	Simulation of the neutral inventory in the Pilot-PSI beam	R. Wieggers