21st International Workshop on Plasma Edge Theory in Fusion Devices (PET21)

Welcome to PET21

    On behalf of the Local Organizing Committee and the International Scientific Committee, we are pleased to invite you to the 21st International Workshop on Plasma Edge Theory in Fusion Devices (PET21), organized by the National Institute for Fusion Science, National Institutes of Natural Sciences. The workshop will be held from Tuesday, 19 October to Friday, 22 October 2027, at the Acty hall in JA Nagano Prefecture Building in Nagano, Japan.
    As in the preceding workshops, PET21 will provide a forum for discussing the current status and recent advances in the theory and modeling of edge plasmas in magnetic confinement fusion devices. Emphasis will be placed on the development of theoretical models and appropriate numerical methods, as well as their comparison with experimental observations. The workshop will consist of invited lectures, contributed oral presentations, and poster presentations. Contributors giving invited and oral presentations are also encouraged to present a poster. Invited papers and accepted contributed papers will be included in the workshop proceedings and will undergo the usual peer-review process in Contributions to Plasma Physics. A welcome reception and a banquet will be held on the evenings of 19 October and 21 October, respectively.
    We look forward to welcoming you to Nagano.

PET21 Local Organizing Committee

Topicstopics

The following topics are intended to be covered by the workshop:
1. Basic plasma edge theory
• Magnetic boundary structure including magnetic stochasticity and alternative magnetic configurations
• Edge transport parallel and perpendicular to magnetic field, electric field effects, instabilities, turbulence, and boundary conditions
• Neutrals and multi-ion theories, radiation
• Plasma detachment including cold and dense buffer plasmas
• New edge-relevant numerical and computational methods

2. Models of special phenomena and edge control
• L-H transition, interplay between pedestal and SOL, ELMs (including control, small and no ELM regimes)
• Flow patterns, momentum transport, and impurity retention

3. Integrated plasma modelling
• Kinetic and Monte Carlo codes, Multifluid codes
• Effects of plasma edge/core coupling
• Validation of edge plasma theories and codes
• Machine learning and AI-assisted techniques for edge plasma theory and simulations

Practical Informationtopics

Language
The official language of the Conference is English.

Calendar
1st Announcement : 5 October 2026
PET-21 Workshop: 19-22 October 2027

News
5 October 2026: 1st announcement     Flyer