Name: 4th Annual Meeting of EUROfusion HPC ACHs
Start: 2026-10-27T09:00:00+01:00
End: 2026-10-28T16:20:00+01:00
Location: Garching, Germany

4th Annual Meeting of EUROfusion HPC ACHs

from Tuesday, 27 October 2026 (09:00) to Wednesday, 28 October 2026 (16:20)

Monday, 26 October 2026
Tuesday, 27 October 2026
09:00 Welcome - Roman Hatzky (IPP)
Welcome
- Roman Hatzky (IPP)
09:00 - 09:10
Room: Building D2, room 436 (seminar room, last floor)
09:10 Report of Team Leader ACH-EPFL - Gilles Fourestey (EPFL)
Report of Team Leader ACH-EPFL
- Gilles Fourestey (EPFL)
09:10 - 09:20
Room: Building D2, room 436 (seminar room, last floor)
09:20 Reports from ACH-EPFL members
09:20 - 11:00
Room: Building D2, room 436 (seminar room, last floor)
Contributions

09:20 Soledge3X Code Optimization and GPU Production Computing for the WEST Tokamak - Mathieu Peybernes (EPFL)

09:45 Improvements for Vlasov Kernel in GENEX - Piyush Panchal (EPFL)

10:10 Gysela-X++ - Emily Bourne (EPFL)

10:35 Fusion Digital Twin - Florian Cabot (EPFL)
11:00 Coffee Break
Coffee Break
11:00 - 11:20
Room: Building D2, room 436 (seminar room, last floor)
11:20 Reports from ACH-EPFL members cont.
11:20 - 12:35
Room: Building D2, room 436 (seminar room, last floor)
Contributions

11:20 Implicit Solver Performance: Bottlenecks and Optimizations in GBS and Beyond Compute: Communication Profiling and Optimization in FELTOR - Nicola Varini (EPFL)

11:45 ASCOT6-GPU physics improvements - Gilles Fourestey (EPFL)

12:10 LINDNES and SPECTER - Emmanuel Lanti (EPFL)
12:35 Lunch
Lunch
12:35 - 14:00
Room: Building D2, room 436 (seminar room, last floor)
14:00 Report of Team Leader ACH-BSC/CIEMAT - Mervi Mantsinen (CIEMAT)
Report of Team Leader ACH-BSC/CIEMAT
- Mervi Mantsinen (CIEMAT)
14:00 - 14:10
Room: Building D2, room 436 (seminar room, last floor)
14:10 Reports from ACH-CIEMAT members
14:10 - 15:25
Room: Building D2, room 436 (seminar room, last floor)
Contributions

14:10 ACH-BSC work over XTAPAS, Alya and SPICE2 code during 2026 - Alejandro Soba (BSC)

14:35 Enabling Exascale GPU Performance for Fusion Edge Modeling Codes - Manuel Augusto Maidana Silanes (CIEMAT)

15:00 Progress on BIT1 GPU Porting - Xavier Saez (CIEMAT)
15:25 Coffee Break
Coffee Break
15:25 - 15:45
Room: Building D2, room 436 (seminar room, last floor)
15:45 Reports from ACH-CIEMAT members cont.
15:45 - 17:00
Room: Building D2, room 436 (seminar room, last floor)
Contributions

15:45 Progress report on work done with CARIDDI and JOREK-DREAM - Federico Cipolletta (CIEMAT - BSC)

16:10 Continuous performance monitoring for STELLA - Joan Vinyals Ylla Catala (BSC)

16:35 Hybrid Parallelization in SOLPS-ITER, (Zoom) - Gaurav Saxena (CIEMAT)
18:00 Meeting Dinner* (Gasthof Neuwirt, Münchener Str. 10, 85748 Garching bei München)
Meeting Dinner* (Gasthof Neuwirt, Münchener Str. 10, 85748 Garching bei München)
18:00 - 20:00
Room: Building D2, room 436 (seminar room, last floor)
Wednesday, 28 October 2026
09:00 Report of Team Leader ACH-MPG - Roman Hatzky (IPP)
Report of Team Leader ACH-MPG
- Roman Hatzky (IPP)
09:00 - 09:10
Room: Building D2, room 436 (seminar room, last floor)
09:10 Reports from ACH-MPG members
09:10 - 10:25
Room: Building D2, room 436 (seminar room, last floor)
Contributions

09:10 Progress report on OpenMP offloading in ORB5 - Ville-Markus Yli-Suutala (VTT)

09:35 Progress in porting domain-decomposed Monte Carlo to GPUs - Oskar Lappi (VTT)

10:00 Acceleration of GrilliX timestep and optimization of GEMPICX - Cristian Lalescu (IPP)
10:25 Coffee Break
Coffee Break
10:25 - 10:45
Room: Building D2, room 436 (seminar room, last floor)
10:45 Reports from ACH-MPG members cont.
10:45 - 11:35
Room: Building D2, room 436 (seminar room, last floor)
Contributions

10:45 Multi regions-of-interest (ROI) in REFMUL3 - Tiago Ribeiro (IPP)

11:10 Benchmarks and validation of the Pitagora HPC system - Serhiy Mochalskyy (IPP)
11:35 ASDEX Upgrade tour
ASDEX Upgrade tour
11:35 - 12:30
Room: Building D2, room 436 (seminar room, last floor)

12:30 Lunch
Lunch
12:30 - 14:00
Room: Building D2, room 436 (seminar room, last floor)
14:00 Discussion of relevant topics
14:00 - 14:40
Room: Building D2, room 436 (seminar room, last floor)
Contributions

14:00 Experiences with the Pitagora HPC system

14:20 News from E-TASC General meeting
14:40 Organisational issues
14:40 - 15:00
Room: Building D2, room 436 (seminar room, last floor)
Contributions

14:40 Next meeting

14:50 AOB
15:00 End of meeting
End of meeting
15:00 - 15:01
Room: Building D2, room 436 (seminar room, last floor)

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