GATO

Contacts: Alan Turnbull, Orso Meneghini, Sterling Smith, Joseph McClenaghan

Short Description

Run the GATO ideal MHD stability code

Keywords

MHD, stability, ideal, low n

Long Description

GATO computes the linear ideal MHD stability in axisymmetric geometry using the Galerkin procedure to reduce the variational formulation to a matrix eigenvalue problem where the eigenvalue is the square of the mode frequency and the eigenm ode represents the plasma fluid displacement. The Galerkin expansion is in terms of finite hybrid elements (FHE) in the poloidal plane and a Fourier expansion in the toroidal direction. The code can treat any axisymmetric toroidal geometry. It has been applied to the design and analysis of tokamaks, spherical tori, spheromaks, and reversed field pinches.

Typical workflows

This module is used to:

• GUI allows convenient editing of default GATO parameters:

  • Selection of ‘realistic wall’, ‘conformal wall’, ‘no wall’

  • Radial/poloidal grid resolution

  • Mode numbers

  • Compressibility

  • Test packing of flux surfaces before running full simulation

• Parallel execution of different wall distances, mode numbers and resolutions

• Perform stability calculations at different equilibrium Beta

• Automatically execute GATO postprocessing and convert PS output to PDF for visualization

Supported devices

• Device independent

Relevant publications

• Bernard, L. C., F. J. Helton, and R. W. Moore. “GATO: an MHD stability code for axisymmetric plasmas with internal separatrices.” Computer Physics Communications 24.3-4 (1981): 377-380.

External resources

Manual: https://fusion.gat.com/THEORY/gato/Gato_manual_Version4.pdf

Classes

• omfit_classes.omfit_base.OMFITcollection()

• omfit_classes.omfit_eqdsk.OMFITgeqdsk()

• omfit_classes.omfit_gato.OMFITdskgato()

• omfit_classes.omfit_gato.OMFITgatoDiagnostic()

• omfit_classes.omfit_json.OMFITjson()

• omfit_classes.omfit_namelist.OMFITnamelist()

Contributors

List of contributors sorted by number of lines authored:

1076 Joseph McClenaghan
 766 Alan Turnbull
 317 Fusion Bot
 114 Orso Meneghini
  31 Brendan Lyons
  19 Sterling Smith
   1 Qilong Ren

Submodules

None

Users

List of usernames sorted by number of module imports: mcclenaghanj, renq, turnbull, guowf, wangqi, wangyuanzhen, marinoni, wanghuiqian, cotet, smithsp, lizeyu, panck, knolkerm, meneghini, boyesw, lao, wangzw, jlchen, kimkyungjin, wangy, chenji, bursche, lig, tangt, abbatej, garofalo, lyonsbc, huangj, likai, liuy_dlut, parkjm, shilin, zhaodeng, ashourvana, dingsiye, gavdeeva, halfmoonm, hansonjm, huqiming, hyueheng, inyong, izzov, kongd, ligq, linami, luce, perillor, razor, shafer, sunap, user1, wangh, wangliang, weisbergd, xiangjian, zyli