37th meeting of the ITPA Divertor and Scrape-Off-Layer Topical Group meeting

26 Jan 2026, 08:30 → 29 Jan 2026, 19:00 Europe/Paris

Zoom

Meeting location: IPP Garching, Germany

Website: ipp.mpg.de/37th-itpa-divsol

Objectives of the meeting

• Update on the progress of TG DivSOL activities in the three main topical areas: Physics, Materials and Modeling.
• Review the progress of the current joint activities and discuss status of remaining open issues and potential closure of joint activities.
• Report on the recommendations and action items arising from the ITPA-CC meeting in December 2025.
• Discuss and identify emerging high priority issues to be addressed for ITER and corresponding potential new joint activities for 2026/27.

Registration is open again until 19 December 2025.

Early registration is appreciated to ease meeting organisation.

Should you need an invitation letter for arranging your travel, please indicate this in the registration form and contact Karl Krieger at karl.krieger@ipp.mpg.de to ensure your request is processed promptly.

Hotel information including rates is available for registered participants in files below

Hotels_in_Garching_List.pdf

Hotels_in_Garching_Map.pdf

Monday 26 January

08:30 → 09:30 Day 1: Opening and logistics

08:30 Welcome

Speaker: Sven Wiesen (Differ - Dutch Institute for Fundamental Energy Research (EU))

08:35 Logistics

Speaker: Karl Krieger (IPP - Max-Planck-Institut für Plasmaphysik (EU))

08:45 Host lab talk (IPP)

Speaker: Thomas Putterich (IPP - Max-Planck-Institut für Plasmaphysik (EU))

09:00 ITER status talk

Speaker: Tom Wauters (ITER Organization (IO))

09:30 → 10:30 Day 1: DSOL45

09:30 DSOL-45 intro

Speaker: Tom Wauters (ITER Organization (IO))

09:45 Updates on modelling of wall conditioning discharges with the SOLPS-ITER code

Speaker: Anthony Piras (KU Leuven (EU))

10:00 Results of hydrogen and deuterium ion cyclotron wall conditioning plasma characterization in the TOMAS device

Speaker: Daniel Lopez

10:15 ECWC in JT-60SA

Speaker: Masakatsu Fukumoto (QST)

10:30 → 10:50 Coffee break

10:50 → 11:20 Day 1: Discussion DSOL-45

Convener: Tom Wauters (ITER Organization (IO))

11:20 → 12:25 Day 1: DSOL-48

11:20 DSOL-48 intro

Speaker: Dr Florian Effenberg (Princeton Plasma Physics Laboratory)

11:25 Boron distribution from powder dropping in DIII-D

Speaker: Dr Florian Effenberg (Princeton Plasma Physics Laboratory)

11:40 Empirical modeling of multi-machine data

Speaker: Alessandro Bortolon (PPPL)

11:55 LHD experiments

Speaker: G. Motojima (NIFS)

12:10 WEST dropper experiments

Speaker: Alberto Gallo (CEA)

12:25 → 13:25 Lunch break

13:25 → 15:30 Day 1: DSOL-49

13:25 DSOL-49 intro

Speaker: Suguru Masuzaki (National Institutefor Fusion Scienc (JP))

13:30 Fuel retention characteristics in EAST long-pulse discharges under different wall conditions

Speaker: Zhe Wang

13:45 Fuel retention due to boronization : latest results from WEST

Speaker: Emmanuelle Tsitrone (CEA)

14:00 Results of samples analysis from AUG

Speaker: Karl Krieger (IPP - Max-Planck-Institut für Plasmaphysik (EU))

14:15 ICWC interaction with B layers in WEST

Speaker: Ewa Pawelec (Institute of Physics, University of Opole)

14:30 Erosion of B layer by D plasma and D retention studies at DIFFER

Speaker: Thomas Morgan

14:45 Studies of boron layer fuel removal by plasma exposure in TOMAS and PSI-2

Speaker: Anne Houben (FZJ - Forschungszentrum Julich (EU))

15:00 Boron layer erosion at the FW position in W7-X

Speaker: Chandra Prakash Dhard (MPG)

15:15 Boron erosion and redeposition in deuterium plasma in PSI-2

Speaker: Arkadi Kreter (FZJ - Forschungszentrum Julich (EU))

15:30 → 15:50 Coffee break

15:50 → 17:10 Day 1: DSOL-47

15:50 DSOL-47 intro

Speaker: Volker Rohde (IPP - Max-Planck-Institut für Plasmaphysik (EU))

15:55 Boronisation at AUG: sample analyses and QMB enhancements

Speaker: Sehoon An (MPG)

16:10 Boronisation at WEST: analysis of samples

Speaker: Alberto Gallo (CEA)

16:25 A comparative study of boronization assisted by ICWC and GDC in EAST

Speaker: Dr Yanhong Guan

16:40 Boronisation at LHD: analysis of samples

Speaker: Suguru Masuzaki (National Institutefor Fusion Scienc (JP))

16:55 Boronisation at DIII-D

Speaker: Igor Bykov (General Atomics)

17:10 → 18:40 Day 1: Discussion DSOL-47/48/49

Conveners: Dr Florian Effenberg (Princeton Plasma Physics Laboratory), Suguru Masuzaki (National Institutefor Fusion Scienc (JP)), Volker Rohde (IPP - Max-Planck-Institut für Plasmaphysik (EU))

Tuesday 27 January

08:30 → 10:20 Day 2: DSOL-41

08:30 DSOL-41 Intro

Speakers: Adam McLean (LLNL), Sven Wiesen (Differ - Dutch Institute for Fundamental Energy Research (EU))

08:35 XPR turbulence simulations with GRILLIX

Speaker: Konrad Eder (MPG)

08:50 Physics insights from a large-scale 2D UEDGE simulation database for detachment control in KSTAR

Speaker: M. Zhao (LLNL)

09:05 Recent progresses of radiation mantle, XPR and CRD on EAST

Speakers: Kedong Li (IPP - Institute of Plasma Physics (CN)), Kai Wu (ASIPP (CN))

09:20 A predictive formula for the H-Mode separatrix density: Bridging regression and physics-based models across C-Mod, AUG and JET tokamaks

Speaker: Davide Silvagni (IPP - Max-Planck-Institut für Plasmaphysik (EU))

09:35 Mechanism of divertor quick transition process to X-point radiators in the WEST tokamak using time-dependent simulations.

Speaker: Hao YANG (Aix-Marseille University (EU))

09:50 Dynanic modeling of XPR formation in ITER

Speaker: Anastasia Poletaeva

10:05 Integrated modeling of divertor detachment considering wall material evolution

Speaker: Xu Guoliang (ASIPP)

10:20 → 10:50 Day 2: Discussion DSOL-41

Conveners: Adam McLean (LLNL), Sven Wiesen (Differ - Dutch Institute for Fundamental Energy Research (EU))

10:50 → 11:10 Coffee break

11:10 → 12:15 Day 2: DSOL-46

11:10 DSOL-46 intro

Speaker: Rui Ding (IPP - Institute of Plasma Physics (CN))

11:15 Upgraded ERO simulation for ITER with wide grid

Speaker: Christoph Baumann (FZJ)

11:30 Recent experimental results on EAST and AUG

Speaker: M. Rasinski (FZJ)

11:45 Updated CXN studies on EAST

Speaker: Jin Guo (ASIPP (CN))

12:00 R&D updates on PdMIS Charge-Exchange Sensors with MEMS shutters

Speaker: Ryan Hood (Sandia)

12:15 → 12:45 Day 2: Discussion DSOL-46

Conveners: Rui Ding (IPP - Institute of Plasma Physics (CN)), Sebastijan Brezinsek (FZJ - Forschungszentrum Julich (EU))

12:45 → 13:45 Lunch break

13:45 → 14:50 Day 2: DSOL-43

13:45 DSOL-43 intro

Speaker: Matthias Bernert (IPP - Max-Planck-Institut für Plasmaphysik (EU))

13:50 AUG detachment control: recent experiments and future plans

Speaker: Pierre David (MPG)

14:05 Synthetic system identification using multisine perturbations with SOLPS-ITER

Speaker: Stijn Kobussen (Dutch Institute for Fundamental Energy Research (EU))

14:20 Long-pulse detachment feedback control progress and the removal strategy of the wall-retained impurities on EAST

Speaker: Kai Wu (ASIPP (CN))

14:35 DIII-D & KSTAR experimental overview

Speaker: David Eldon (GA)

14:50 → 15:20 Day 2: DSOL-43 Discussion

Convener: Matthias Bernert (IPP - Max-Planck-Institut für Plasmaphysik (EU))

15:20 → 15:40 Coffee break

15:40 → 16:45 Day 2: MDC-DSOL-1

15:40 MDC-DSOL-1 intro

Speaker: Karl Krieger (IPP - Max-Planck-Institut für Plasmaphysik (EU))

15:45 AUG plans to expose W limiter to RE impact

Speaker: Karl Krieger (IPP - Max-Planck-Institut für Plasmaphysik (EU))

16:00 JOREK RE final loss instability modeling progress

Speaker: Matthias Hoelzl (IPP - Max-Planck-Institut für Plasmaphysik (EU))

16:15 RE impact material damage modeling progress

Speaker: Svetlana Ratynskaia

16:30 DIII-D graphite limiter impacts with REs

Speaker: Eric Hollmann (UC San Diego)

16:45 → 17:15 Day 2: Discussion MDC-DSOL-1

Convener: Karl Krieger (IPP - Max-Planck-Institut für Plasmaphysik (EU))

17:15 → 18:00 Day 2: CFS Session

17:15 SepOS for SPARC, current activities and recent results

Speaker: Thomas Eich

17:30 Predicting detachment access via fast, analytical models for SPARC

Speaker: Bart Lomanowski

17:45 The capabilities of the Boundary Digital Twin in preparation for SPARC operation: Current Status and outlook

Speaker: ANDREAS REDL (Commonwealth Fusion Systems)

18:00 → 18:30 Day 2: CFS Session Discussion

Convener: Sven Wiesen (Differ - Dutch Institute for Fundamental Energy Research (EU))

Wednesday 28 January

08:25 → 10:05 Day 3: PEP-DSOL-1

08:25 PEP-DSOL-1 intro

Speaker: Michael Faitsch (IPP - Max-Planck-Institut für Plasmaphysik (EU))

08:30 Turbulence Simulations of the Quasi-Continuous Exhaust (QCE) regime

Speaker: Kaiyu Zhang (MPG)

08:45 Increased edge particle transport near H-mode density limits on Alcator C-Mod and ASDEX Upgrade

Speaker: Andrés Miller (MIT PSFC)

09:00 AUG: Density shoulder in QCE

Speaker: Jessica Stobbs

09:15 Exploring the transition from continuous turbulence fluctuations to bursting ELMs in high SOL density regimes

Speaker: Nami Li (Lawrence Livermore National Laboratory)

09:30 Pedestal and SOL turbulence bebaviors in H-mode detached plasma with small ELMs on the HL-2A tokamak

Speaker: Ting Wu (SWIP)

09:45 Simulation of simultaneous detachment/ELM mitigation due to neon injection within Edge Plasma Coupling Simulation framework

Speaker: Shifeng Mao (University of Science and Technology of China (CN))

10:05 → 10:30 Day 3: PEP-DSOL-1 Discussion

Convener: Michael Faitsch (IPP - Max-Planck-Institut für Plasmaphysik (EU))

10:30 → 10:50 Coffee break

10:50 → 11:55 Day 3: DSOL-51

10:50 DSOL-51 intro

Speaker: Klaus Schmid (MPG)

10:55 W transport in neon-seeded ELM-free H-mode using ERO2.0/JINTRAC

Speaker: Henri Kumpulainen (FZJ - Forschungszentrum Julich)

11:10 WEST for edge tungsten transport

Speaker: Nicolas Fedorczak (CEA)

11:25 SOLEDGE HDG modeling of WEST limiter startup

Speaker: Ivan Kudashev

11:40 W/Ni erosion and migration in JET limiter configurations

Speaker: Pyry Virtanen (Aalto University (EU))

11:55 → 12:15 Day 3: DSOL-51 Discussion

Convener: Klaus Schmid (MPG)

12:15 → 13:05 Lunch break

13:05 → 14:10 Day 3: Special Session on Coatings and Alloys

13:05 Introduction

Speaker: Tom Wauters (ITER Organization (IO))

13:10 ITER TFW and W coating qualification

Speaker: Takeshi Hirai

13:25 Development and qualification of thin W coatings on Inconel for COMPASS-U PFC

Speaker: Renaud Dejarnac (IPPCR - Institute of Plasma Physics AS CR (EU))

13:40 IPP Garching development CS coating + experience with W heavy alloy.

Speaker: Rudolf Neu (MPG)

13:55 Testing of ITER TFW tiles on WEST

Speaker: Marianne Richou (CEA)

14:10 → 14:40 Day 3: Discussion Special Session Coatings and Alloys

Convener: Tom Wauters (ITER Organization (IO))

14:40 → 15:30 Day 3: DSOL-50

14:40 DSOL-50 intro

Speaker: Wouter Tierens

14:45 low-density experiments in WEST

Speaker: Dr laurent COLAS (CEA/IRFM)

15:00 RF-specific impurities in AUG

Speaker: Volodymyr Bobkov

15:15 Modeling erosion and redeposition with GITR

Speaker: Atul Kumar (ORNL - Oak Ridge National Laboratory (US))

15:30 → 15:50 Day 3: Discussion DSOL-50

Conveners: Wouter Tierens, tbc

15:50 → 16:10 Coffee Break

16:10 → 17:00 Day 3: DSOL-34

16:10 DSOL-34 intro

Speaker: Nicola Vianello (CNR - Consiglio Nazionale delle Ricerche (EU))

16:15 Unified scaling for farSOL density decay in JET H-mode discharges

Speaker: Christian Perez von thun (IPPLM (EU))

16:30 SOL flow mesurements and model validation

Speaker: Richard Ducker (EPFL)

16:45 Enhanced Turbulent Transport and Drift Suppression in Divertors at the Detachment Onset

Speaker: Rabel Rizkallah (University of California San Diego)

17:00 → 17:20 Day 3: DSOL-34 Discussion

Convener: Nicola Vianello (CNR - Consiglio Nazionale delle Ricerche (EU))

17:20 → 18:20 Day 3: T&C-DSOL session proto-cross-TG

17:20 Towards reduced transport models in the SOL: state of the art and future perspectives

Speaker: Maurizio Giacomin

17:35 A Pre-trained Variational Autoencoder-based Surrogate Model for Plasma Turbulence

Speaker: M. Yang

17:50 SOLPS-NN and coupling to JINTRAC

Speaker: Stefan Dasbach

18:05 From UEDGE to DivControlNN: Surrogate Modeling of SOL/Divertor States for Detachment and Transport Studies

Speaker: Xueqiao Xu

18:20 → 18:40 Day 3: T&C-DSOL Discussion

Convener: Alessandro Bortolon (PPPL)

19:30 → 22:00 Dinner

Thursday 29 January

08:30 → 09:50 Day 4: DSOL-37

08:30 DSOL-37 intro

Speaker: Manni Jia (CAS - Chinese Academy of Science (CN))

08:35 Divertor Heat Loads and Detachment in RMP scenarios for low-power ITER plasmas

Speaker: Jonathan Van blarcum (ITER Organization (IO))

08:50 Experiments and modelling of RMP effect on ELM control and divertor flux in EAST

Speaker: Manni Jia (CAS - Chinese Academy of Science (CN))

09:05 Integrated ELM and divertor flux control using RMPs in HL-3 tokamak

Speaker: Dongmei FAN (Southwestern Institute of Physics, Chengdu, China)

09:20 Integrating high performance ELM suppression scenario with radiative divertor on DIII-D

Speaker: Qiming Hu (Princeton Plasma Physics Laboratory)

09:35 Explaining observed potential and drift phenomena in Wendelstein 7-X with the mean-field 3D Braginskii model

Speaker: Tobias Tork

09:50 → 10:20 Day 4: DSOL-37 Discussion

Convener: Manni Jia (CAS - Chinese Academy of Science (CN))

10:20 → 10:40 Coffee break

10:40 → 12:00 Day 4: DSOL-44

10:40 DSOL-44 intro

Speaker: Emmanuelle Tsitrone (CEA)

10:45 Upgrade of the high-heat-flux device GLADIS for heavy duty operation - long pulses and a high number of cycles to support the development of next generation plasma facing component

Speaker: Daniel Dickes

11:00 Evolution and impacts of ITER-like W/Cu PFCs with interface cracks in EAST

Speaker: Dahuan Zhu (ASIPP)

11:15 New observation on crack evolution on the WEST ITER grade divertor

Speaker: Alan CEA

11:30 Testing crack formation under WEST conditions on a HHF facility

Speaker: Alan CEA

11:45 Feedback from operating an actively cooled W divertor in KSTAR

Speaker: tbc

12:00 → 12:30 Day 4: DSOL-44 Discussion

Convener: Emmanuelle Tsitrone (CEA)

12:00 Discussion on opening / closing DSOLs

12:15 Closing of meeting and preliminary announcement of next meeting

12:30 → 15:30 Day 4: Closing Session

12:30 Discussion on closing/opening DSOLs

Speakers: Sven Wiesen (Differ - Dutch Institute for Fundamental Energy Research (EU)), Alessandro Bortolon (PPPL), Tom Wauters (ITER Organization (IO))

12:50 Meeting Closing

Speaker: Karl Krieger (IPP - Max-Planck-Institut für Plasmaphysik (EU))

13:30 AUG Tours