Overview/Agenda

The Simons Collaboration on Hidden Symmetries and Fusion Energy organizes a workshop on Stellarator optimization in Greifswald 27 June - 8 July. The objective of the workshop is to provide an opportunity for the exchange of ideas and collaborative work in a relaxed atmosphere. The workshop is open to members of the Collaboration and to scientists from the wider community who work in the field of Stellarator optimization.

(Registration ended on 15 May 2022).    Simons Greifswald Workshop on the Max Planck website

Agenda

When What Topic
Link to Talk
Who Where
Monday 27 June      
9:00 Welcome      
9:15 Talk SPEC: A Pedagogical Perspective J. Loizu / S. Hudson GG
10:15 Coffee      
11:00 Bicycle
Allocation
     
12:30 Lunch      
13:30 Afternoon
Session
MHD Discussion
Stepped-Pressure Equilibria With Fenics
An Update on GVEC
D. Dudt
A. Cerfon
F. Hindenlang
GG
15:00 Coffee      
Tuesday 28 June      
9:00 Talk Near-Axis Expansion R. Jorge GG
10:00 Coffee      
11:00 Tour Tour of W7-X Torus Hall M. Jakobowski Torus Hall
12:30 Lunch      
13:30 Afternoon
Sessions
QI Stellarators w/o "Stellarator Symmetry"
Direct Coil Optimization Using Near-Axis Expansions
Shearless Quasi-Symmetrey
Near-Axis Initial Conditions for Optimization
Near-Axis Expansion: Inverse Approach (no slides)
Preferred Magnetic Axes for Optimal QS
G. Plunk
A. Giuliani
A. Baillod
A. Goodman
E. Rodriquez
W. Sengupta
GG
Wednesday 29 June      
9:00 Talk Selected Big Questions A. Boozer GG
10:00 Coffee      
10:30 Discussion      
12:30 Lunch      
13:30 Afternoon
Session
DESC tutorial
(Jupyter Notebooks)
D. Dudt S2
15:00 Coffee      
Thursday 30 June      
9:00 Talk Topics in Optimization
Constrained, Multi-Objective, Parameterized Optimization
D. Bindel /
G. Stadler
GG
10:00 Coffee      
12:30 Lunch      
13:30 Afternoon
Session
Optimization
 Direct QS Coil Optimization with Nested Flux Sufaces
 Auto Differentiation And Other Tricks
 Permanent Magnet Sparse Regression Optimization
(PDF)
G. Stadler
A. Giuliani
R. Conlin
A. Kaptanoglu
GG
15:00 Coffee      
Friday 1 July      
9:00 Talk Quasi-Isodynamic Stellarators G. Plunk GG
10:00 Coffee      
10:30 Discussion      
12:30 Lunch      
13:30 Afternoon
Session




Tutorial
A Better MHD Code: Quasi-Relaxed MHD (QRxMHD)
New Angle Representation Implemented in SPEC
COBRA-VMEC Speed Up / Unstable Ballooning Modes
Mathematical Aspects of Magnetic Coordinates
MHD Coil Calcs, Boundary Considerations & More (PDF)

SIMSOPT tutorial
Robert Dewar
Antoine Baillod
Max Ruth
David Perrella
John Schmitt

S. Buller
GG
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8.2-001
15:00 Coffee      
Monday 4 July      
9:00 Talk Divertors
Radiating Mantle Small Plasmas (w/video)  (PDF)
T.S. Pedersen
A. Pandey
GG
10:00 Coffee      
10:30 Talk SIMSOPT overview E. Paul GG
12:30 Lunch      
13:30 Afternoon
Session
Divertors
  Divertor Neutral Pressure Modeling
  Divertor Optimization
  Divertor Geometry Modeling

Quasi-Isodynamic Stellarators
  QI Stellarator With Fast Ion Confinement
  Finding Precisely Quasi-Isodynamic Fields
  Finding the Closest QI and Parametrizing it
  What I Find Interesting about QPS (PDF)
  QO/QP Stellarator Optimization Methods/Properties  (PDF)
Joris Fellinger
Victoria Haak
Amit Kharwandikar
Thomas Sieber

G. Plunk
Edi Sanchez
Allan Goodman
José Luis Velasco
Elizabeth Paul
Don Spong
GG
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7.2-001
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15:00 Coffee      
Tuesday 5 July      
10:30 Guided Tour of Greifswald Market Square
12:30 Boat Trip Museum Harbour
Wednesday 6 July      
9:00 Talk Turbulence  (PDF) P. Helander GG
10:00 Coffee      
10:30 Discussion      
12:30 Lunch      
13:30 Afternoon
Session
Optimizing for ITG Critical Gradient
Gyrokinetic Simulations of Plasmas
Universal Instability in Stellarators

Fast Ions
  Resonant Alpha Loss In Stellarators
  Orbit-averaged Calculations: Status & Future Work
  Symplectic Integrator for Alphas
Gareth Roberg-Clark
Oleksiy Mishchenko
Paul Costello

Elizabeth Paul
Roscoe White
José Luis Velasco
Christopher Albert
GG
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7.2-001
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15:00 Coffee      
Thursday 7 July      
9:00 Talk Fast Ions (PDF) E. Paul GG
10:00 Coffee / Tour Tour of W7-X Torus Hall T. S. Pedersen Torus Hall
10:30 Discussion
12:30 Lunch      
13:30 Afternoon
Session
Additional Transport Topics
  Solving Anisotropic Diffusion Equations
  HELIAS Optimization for Neoclassical Transport
G. Plunk
  Dean Muir
  Craig Beidler
GG
15:00 Coffee      
Friday 8 July      
9:00 Bicycle Return Deadline    
9:00 Talk Retreat Summary  (Video of Summary Talk) A. Bhattacharjee GG
10:00 Coffee Conference Concludes    
    Conference Photos Video (No Music Conference Video)    
GG = Günter Grieger lecture hall
S2 = Seminar room 2

Zoom link for morning sessions   in GG: https://zoom.us/j/96302088142?pwd=dzVZRm5VVHlRaWpmVnF2SllJMk1IUT09
Zoom link for afternoon sessions in GG: https://zoom.us/j/98124143908?pwd=RjNUSHBkcVNBMjlMaWhBdzVmSHFRUT09
Zoom link for afternoon sessions in S2:  https://zoom.us/j/99141944919?pwd=eEVNalQrRXV3akJ5eElvaUVCQjg3Zz09
Zoom link for SIMSOPT tutorial   in :       https://zoom.us/j/99218508413?pwd=aDdBOTdsQ0pnWjV6REVxTXhBSVVTdz09