pyoculus.problems.spec_bfield.SPECBfield Class Reference

Class that used to setup the SPEC bfield problem for interfacing Fortran, used in ODE solver. More...

Inheritance diagram for pyoculus.problems.spec_bfield.SPECBfield:

Public Member Functions
	__init__ (self, spec_data, lvol)
	the problem size, 2 for 1.5D/2D Hamiltonian system
	B (self, coords, *args)
	Returns magnetic fields.
	dBdX (self, coords, *args)
	Returns magnetic fields.
	B_many (self, x1arr, x2arr, x3arr, input1D=True, *args)
	Returns magnetic fields, with multipy coordinate inputs.
	dBdX_many (self, x1arr, x2arr, x3arr, input1D=True, *args)
	Returns magnetic fields.
	convert_coords (self, stz)
	Python wrapper for getting the xyz coordinates from stz.
Public Member Functions inherited from pyoculus.problems.spec_problem.SPECProblem
	__init__ (self, spec_data, lvol)
	Set up the equilibrium for use of the fortran module.
Public Member Functions inherited from pyoculus.problems.toroidal_bfield.ToroidalBfield
	__init__ (self)
	Set up the problem with two cyclical coordinates, e.g.
	f (self, zeta, st, *args)
	Returns ODE RHS.
	f_tangent (self, zeta, st, *args)
	Returns ODE RHS, with tangent.
Public Member Functions inherited from pyoculus.problems.toroidal_problem.ToroidalProblem
	__init__ (self)
	Set up the problem with two cyclical coordinates, e.g.
Public Member Functions inherited from pyoculus.problems.base_problem.BaseProblem
	__init__ (self)
Public Member Functions inherited from pyoculus.problems.bfield_problem.BfieldProblem
	__init__ (self)
	Set up the problem.

Additional Inherited Members
Public Attributes inherited from pyoculus.problems.spec_problem.SPECProblem
	fortran_module = fortran_module
	Mvol = spec_data.output.Mvol
	Ntor = spec_data.input.physics.Ntor
	Mpol = spec_data.input.physics.Mpol
	Igeometry = spec_data.input.physics.Igeometry
int	NOTstellsym = 0
	Nfp = spec_data.input.physics.Nfp
float	rpol = spec_data.input.physics.rpol
float	rtor = spec_data.input.physics.rtor
	ivol = lvol
	Lrad = spec_data.input.physics.Lrad[lvol - 1]
tuple	Lcoordinatesingularity
Public Attributes inherited from pyoculus.problems.base_problem.BaseProblem
int	problem_size = 2
str	poincare_plot_type = "yx"
str	poincare_plot_xlabel = "y"
str	poincare_plot_ylabel = "x"
Public Attributes inherited from pyoculus.problems.bfield_problem.BfieldProblem
bool	has_jacobian = False
	if the output magnetic field contains the jacobian factor or not

Detailed Description

Class that used to setup the SPEC bfield problem for interfacing Fortran, used in ODE solver.

See specbfield for more details.

The SPECBfield system of ODEs is given by

\[ \frac{ds}{d\zeta} = \frac{B^{s}}{B^{\zeta}} \]

\[ \frac{d\theta}{d\zeta} = \frac{B^{\theta}}{B^{\zeta}} \]

Constructor & Destructor Documentation

__init__()

pyoculus.problems.spec_bfield.SPECBfield.__init__	(		self,
			spec_data,
			lvol )

the problem size, 2 for 1.5D/2D Hamiltonian system

Set up the equilibrium for use of the fortran module

Parameters

spec_data	the SPEC data generated by py_spec.SPECout
lvol	which volume we are interested in, from 1 to spec_data.input.Mvol Only support SPEC version >=3.0

Member Function Documentation

B()

pyoculus.problems.spec_bfield.SPECBfield.B	(		self,
			coords,
		*	args )

Returns magnetic fields.

Parameters

coordinates	\((s,\theta,\zeta)\)
*args	extra parameters

Returns

the contravariant magnetic fields

Reimplemented from pyoculus.problems.bfield_problem.BfieldProblem.

B_many()

pyoculus.problems.spec_bfield.SPECBfield.B_many	(		self,
			x1arr,
			x2arr,
			x3arr,
			input1D = True,
		*	args )

Returns magnetic fields, with multipy coordinate inputs.

Parameters

x1arr	the first coordinates. Should have the same length as the other two if input1D=True.
x2arr	the second coordinates. Should have the same length as the other two if input1D=True.
x3arr	the third coordinates. Should have the same length as the other two if input1D=True.
input1D	if False, create a meshgrid with sarr, tarr and zarr, if True, treat them as a list of points
*args	extra parameters

Returns

the contravariant magnetic fields

Reimplemented from pyoculus.problems.bfield_problem.BfieldProblem.

convert_coords()

pyoculus.problems.spec_bfield.SPECBfield.convert_coords	(		self,
			stz )

Python wrapper for getting the xyz coordinates from stz.

Parameters

stz	the stz coordinate

Returns

the xyz coordinates

Reimplemented from pyoculus.problems.toroidal_problem.ToroidalProblem.

dBdX()

pyoculus.problems.spec_bfield.SPECBfield.dBdX	(		self,
			coords,
		*	args )

Returns magnetic fields.

Parameters

coordinates	\((s,\theta,\zeta)\)
*args	extra parameters

Returns

B, dBdX, the contravariant magnetic fields, the derivatives of them

Reimplemented from pyoculus.problems.bfield_problem.BfieldProblem.

dBdX_many()

pyoculus.problems.spec_bfield.SPECBfield.dBdX_many	(		self,
			x1arr,
			x2arr,
			x3arr,
			input1D = True,
		*	args )

Returns magnetic fields.

Parameters

x1arr	the first coordinates. Should have the same length as the other two if input1D=True.
x2arr	the second coordinates. Should have the same length as the other two if input1D=True.
x3arr	the third coordinates. Should have the same length as the other two if input1D=True.
input1D	if False, create a meshgrid with sarr, tarr and zarr, if True, treat them as a list of points
*args	extra parameters

Returns

B, dBdX, the contravariant magnetic fields, the derivatives of them

Reimplemented from pyoculus.problems.bfield_problem.BfieldProblem.

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The documentation for this class was generated from the following file:

• pyoculus/problems/spec_bfield.py