Theory

General
Basis functions and collocation nodes
Perturbation Theory
Zernike Polynomial Evaluation
List of Variables
Optimizers Supported

Guides

Installation
Using Output Files
Performance Tips

Equilibrium Solve Tutorials

Basic Equilibrium
Advanced Equilibrium & Continuation
Continuation method step by step
Near axis constraints
Free boundary equilibrium

Optimization Tutorials

Basic QS Optimization
Advanced QS Optimization
REGCOIL-Like Coil Optimization in DESC
Omnigenity Optimization
Bootstrap Current Self-Consistency
Stage-Two Filamentary Coil Optimization
Quadratic Flux Minimizing Surfaces
Infinite-\(n\) ideal ballooning stability optimization
Neoclassical transport and fast ions

Public API

Equilibrium, Surfaces, and Profile classes
Objectives, Optimizers, and Grids
Saving and Loading
Plotting
Solving and Perturbing
Magnetic Fields and Coils
Particles
Alphabetical Listing

Command Line Interface and I/O

Command Line Interface
Input File
Outputs

Developer Guides

How do we solve Equilibrium?
Collocation grids
Adding new physics quantities
Adding new objective functions
Using external codes
Adding new optimizers
Jax and Backend
Transforms
Derivatives

DESC Showcase

Publication List

DESC

Equilibrium, Surfaces, and Profile classes
desc.equilibrium.Equilibrium
desc.equilibrium.Equilibrium.G
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desc.equilibrium.Equilibrium.G

property Equilibrium.GSource 

Net poloidal current on the sheet current at the LCFS.

Type:: float

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© Copyright 2020, Plasma Control Group at Princeton University. Last updated on Apr 02, 2026.

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