CITATION.cff

cff-version: 1.2.0
message: "If you use GPEC, please cite it as below, together with the papers behind the modules you use (listed under references and on the documentation's citations page)."
type: software
version: "2.0.0"
title: "GPEC: Generalized Perturbed Equilibrium Code"
abstract: "GPEC is an open-source Julia reimplementation of the Fortran GPEC suite (DCON, VACUUM, STRIDE, GPEC, PENTRC and SLAYER), consolidated into one code base of cooperating physics modules behind a unified, modern interface. It models the response of tokamak plasmas to small non-axisymmetric magnetic perturbations: equilibrium reconstruction from EFIT, CHEASE or IMAS inputs; ideal MHD stability by Newcomb's criterion with the free-boundary vacuum response; resistive tearing stability from the outer-region Δ′ matrix matched to inner-layer models; the perturbed equilibrium driven by coils or error fields, with resonant flux, island widths and Chirikov overlap; and neoclassical toroidal viscosity torque. Applications include error-field correction, resonant magnetic perturbation optimization, kink and tearing stability, and parameter scans and integrated modeling at scale."
authors:
  - given-names: Nikolas
    family-names: Logan
  - given-names: Jong-Kyu
    family-names: Park
  - given-names: Matthew
    family-names: Pharr
  - given-names: Jacob
    family-names: Halpern
  - given-names: Daniel
    family-names: Burgess
  - given-names: Jaebeom
    family-names: Cho
  - given-names: Jaymyoung
    family-names: Lee
  - given-names: Sunjae
    family-names: Lee
  - given-names: Evan
    family-names: Bursch
repository-code: "https://github.com/OpenFUSIONToolkit/GPEC"
url: "https://openfusiontoolkit.github.io/GPEC/dev/"
license: MIT
keywords:
  - plasma physics
  - magnetohydrodynamics
  - tokamak
  - perturbed equilibrium
  - Julia
references:
  - type: article
    title: "Vacuum calculations in azimuthally symmetric geometry"
    authors:
      - given-names: M. S.
        family-names: Chance
    journal: "Physics of Plasmas"
    volume: 4
    issue: 6
    start: "2161"
    year: 1997
    doi: "10.1063/1.872380"
  - type: article
    title: "The direct criterion of Newcomb for the ideal MHD stability of an axisymmetric toroidal plasma"
    authors:
      - given-names: A. H.
        family-names: Glasser
    journal: "Physics of Plasmas"
    volume: 23
    issue: 7
    start: "072505"
    year: 2016
    doi: "10.1063/1.4958328"
  - type: article
    title: "Computation of three-dimensional tokamak and spherical torus equilibria"
    authors:
      - given-names: Jong-Kyu
        family-names: Park
      - given-names: Allen H.
        family-names: Boozer
      - given-names: Alan H.
        family-names: Glasser
    journal: "Physics of Plasmas"
    volume: 14
    issue: 5
    start: "052110"
    year: 2007
    doi: "10.1063/1.2732170"
  - type: article
    title: "Computation of resistive instabilities by matched asymptotic expansions"
    authors:
      - given-names: A. H.
        family-names: Glasser
      - given-names: Z. R.
        family-names: Wang
      - given-names: J.-K.
        family-names: Park
    journal: "Physics of Plasmas"
    volume: 23
    issue: 11
    start: "112506"
    year: 2016
    doi: "10.1063/1.4967862"
  - type: article
    title: "A robust solution for the resistive MHD toroidal Δ′ matrix in near real-time"
    authors:
      - given-names: Alexander S.
        family-names: Glasser
      - given-names: Egemen
        family-names: Kolemen
    journal: "Physics of Plasmas"
    volume: 25
    issue: 8
    start: "082502"
    year: 2018
    doi: "10.1063/1.5029477"
  - type: article
    title: "Tearing stability prediction combining toroidal calculations with a two-fluid slab layer"
    authors:
      - given-names: Daniel A.
        family-names: Burgess
      - given-names: Nikolas C.
        family-names: Logan
      - given-names: Jong-Kyu
        family-names: Park
      - given-names: C. J.
        family-names: Hansen
      - given-names: C.
        family-names: Paz-Soldan
    journal: "Plasma Physics and Controlled Fusion"
    volume: 68
    issue: 6
    start: "065017"
    year: 2026
    doi: "10.1088/1361-6587/ae7156"
  - type: article
    title: "Neoclassical toroidal viscosity in perturbed equilibria with general tokamak geometry"
    authors:
      - given-names: Nikolas C.
        family-names: Logan
      - given-names: Jong-Kyu
        family-names: Park
      - given-names: Kimin
        family-names: Kim
      - given-names: Zhirui
        family-names: Wang
      - given-names: John W.
        family-names: Berkery
    journal: "Physics of Plasmas"
    volume: 20
    issue: 12
    start: "122507"
    year: 2013
    doi: "10.1063/1.4849395"
  - type: article
    title: "Self-consistent perturbed equilibrium with neoclassical toroidal torque in tokamaks"
    authors:
      - given-names: Jong-Kyu
        family-names: Park
      - given-names: Nikolas C.
        family-names: Logan
    journal: "Physics of Plasmas"
    volume: 24
    issue: 3
    start: "032505"
    year: 2017
    doi: "10.1063/1.4977898"