beam_calculator section (mandatory)

If the desired BeamCalculator is Envelope1D:

Entry	Type	Description	Allowed values	Mandatory?
export_phase	str	The type of phases that should be exported in the final DAT file. Note that 'as_in_original_dat' is not implemented yet, but 'as_in_settings' should behave the same way, provided that you alter no FieldMap.CavitySettings.reference attribute.	(‘phi_0_abs’, ‘phi_0_rel’, ‘phi_s’, ‘as_in_settings’, ‘as_in_original_dat’)	❌
flag_cython	bool	If we should use the Cython implementation (faster).		❌
flag_phi_abs	bool	If the field maps phases should be absolute (no implicit rephasing after a failure).		❌
method	str	Integration method.	(‘RK4’, ‘leapfrog’)	❌
n_steps_per_cell	int	Number of integrating steps per cavity cell. Recommended values are 40 for RK4 and 20 for leapfrog.		❌
tool	str	Name of the tool.	(‘Envelope1D’, ‘envelope1d’, ‘Envelope_1D’, ‘envelope_1d’)	✅

If the desired BeamCalculator is Envelope3D:

Entry	Type	Description	Allowed values	Mandatory?
export_phase	str	The type of phases that should be exported in the final DAT file. Note that 'as_in_original_dat' is not implemented yet, but 'as_in_settings' should behave the same way, provided that you alter no FieldMap.CavitySettings.reference attribute.	(‘phi_0_abs’, ‘phi_0_rel’, ‘phi_s’, ‘as_in_settings’, ‘as_in_original_dat’)	❌
flag_cython	bool	Not implemented yet. If we should use the Cython implementation (faster).	(False,)	❌
flag_phi_abs	bool	If the field maps phases should be absolute (no implicit rephasing after a failure).		❌
method	str	Integration method.	(‘RK4’,)	❌
n_steps_per_cell	int	Number of integrating steps per cavity cell. Recommended value is 40.		❌
tool	str	Name of the tool.	(‘Envelope3D’, ‘envelope3d’, ‘Envelope_3D’, ‘envelope_3d’)	✅

If the desired BeamCalculator is TraceWin:

Entry	Type	Description	Allowed values	Mandatory?
algo	int	Optimization using algorithm (0: Owner, 1: Simplex, 2: Diff. evo.)		❌
alpx1	float	Input twiss parameter alpXX’ of main beam		❌
alpx2	float	Input twiss parameter alpXX’ of second beam		❌
alpy1	float	Input twiss parameter alpYY’ of main beam		❌
alpy2	float	Input twiss parameter alpYY’ of second beam		❌
alpz1	float	Input twiss parameter alpZZ’ of main beam		❌
alpz2	float	Input twiss parameter alpZZ’ of second beam		❌
betx1	float	Input twiss parameter betXX’ of main beam		❌
betx2	float	Input twiss parameter betXX’ of second beam		❌
bety1	float	Input twiss parameter betYY’ of main beam		❌
bety2	float	Input twiss parameter betYY’ of second beam		❌
betz1	float	Input twiss parameter betZZ’ of main beam		❌
betz2	float	Input twiss parameter betZZ’ of second beam		❌
cancel_matching	bool	Cancel all matching procedure (Envelope)		❌
cancel_matchingP	bool	Cancel all matching procedure (Tracking)		❌
charge1	float	Input particle charge state of main beam		❌
charge2	float	Input particle charge state of second beam		❌
current1	float	Input beam current (mA) of main beam		❌
current2	float	Input beam current (mA) of second beam		❌
dst_file1	str or Path	Full name Input dst of main beam (*)		❌
dst_file2	str or Path	Full name Input dst of second beam (*)		❌
duty1	float	Duty cycle of main beam		❌
duty2	float	Duty cycle of second beam		❌
dw1	float	Input Dw of main beam		❌
dw2	float	Input Dw of second beam		❌
eln1	float	Input ZZ’ emittance (mm.mrad) of main beam		❌
eln2	float	Input ZZ’ emittance (mm.mrad) of second beam		❌
emit_e_limit	float	Particle is excluded form emit. calculation if |W-Ws|/ Ws > emit_e_limit		❌
emit_p_limit	float	Particle is excluded form emit. calculation if |Ф- Ф s| > emit_p_limit		❌
energy1	float	Input kinetic energy (MeV) of main beam		❌
energy2	float	Input kinetic energy (MeV) of second beam		❌
etnx1	float	Input XX’ emittance (mm.mrad) of main beam		❌
etnx2	float	Input XX’ emittance (mm.mrad) of second beam		❌
etny1	float	Input YY’ emittance (mm.mrad) of main beam		❌
etny2	float	Input YY’ emittance (mm.mrad) of second beam		❌
export_phase	str	The type of phases that should be exported in the final DAT file. Note that 'as_in_original_dat' is not implemented yet, but 'as_in_settings' should behave the same way, provided that you alter no FieldMap.CavitySettings.reference attribute.	(‘phi_0_abs’, ‘phi_0_rel’, ‘phi_s’, ‘as_in_settings’, ‘as_in_original_dat’)	❌
freq1	float	Input beam frequency (MHz) of main beam		❌
freq2	float	Input beam frequency (MHz) of second beam		❌
hide	bool	Hide the GUI, or cancel console output (no parameter).		✅
input_dist_type	int	Input distribution type from 1 to 5, see GUI menu	range(1, 6)	❌
long_dist_mask	int	Mask of the longitudinal input distribution from 1 to 7, see GUI menu	range(1, 8)	❌
lost_e_limit	float	Particle is lost if |W-Ws| > lost_e_limit		❌
lost_p_limit	float	Particle is lost if |Ф- Ф s| > lost_p_limit		❌
mass1	float	Input beam mass (eV) of main beam		❌
mass2	float	Input beam mass (eV) of second beam		❌
nbr_part1	int	Number of particle of main beam		❌
nbr_part2	int	Number of particle of second beam		❌
nbr_thread	int	Set the max. number of core/thread used		❌
partran	int or bool	To activate/deactivate partran tracking.	(0, 1, True, False)	❌
part_step	int	Partran calculation step per meter (per beta.lambda if < 0)		❌
picnic_2d	bool	Space-charge routine is defined as picnic2D		❌
picnic_3d	bool	Space-charge routine is defined as picnic3D		❌
picnic_r_mesh	float	R mesh of picnic 2D		❌
picnic_xy_mesh	float	X&Y mesh of picnic 3D		❌
picnic_z_mesh	float	Z mesh of picnic 3D		❌
picnir_z_mesh	float	Z mesh of picnir 2D		❌
random_seed	int	Set the random seed		❌
spreadw1	float	Input spread energy for CW beam of main beam		❌
spreadw2	float	Input spread energy for CW beam of second beam		❌
synoptic_file	str or Path	Save the geometric layout at (entance (=1), middle (=2), exit (=3) of elements. (See “Synoptic” tools for file name).		❌
tab_file	str or Path	Save to file the data sheet at the end of calcul (by default in calculation directory).		❌
toutatis	float or bool	Force or avoid Toutatis simulation (1 / 0)	(0, 1, True, False)	❌
trans_dist_mask	int	Mask of the transverse input distribution from 1 to 7, see GUI menu	range(1, 8)	❌
upgrade	str	To update LightWin		❌
use_dst_file	bool	dst file is used as input beam distribution		❌
vfac	float	Change RFQ Ucav (ex : “vfac 0.5”, half reduce of Ucav)		❌
x1	float	Input X position of main beam		❌
x2	float	Input X position of second beam		❌
xp1	float	Input X angle of main beam		❌
xp2	float	Input X angle of second beam		❌
y1	float	Input Y position of main beam		❌
y2	float	Input Y position of second beam		❌
yp1	float	Input Y angle of main beam		❌
yp2	float	Input Y angle of second beam		❌
z1	float	Input Z position of main beam		❌
z2	float	Input Z position of second beam		❌
zp1	float	Input Z angle of main beam		❌
zp2	float	Input Z angle of second beam		❌
executable	str or Path	Direct path to the TraceWin executable. If given, will override the definition in the machine_config_file.		❌
flag_phi_abs	bool	If the field maps phases should be absolute (no implicit rephasing after a failure).		❌
ini_path	str or Path	Path to the .ini TraceWin file.		✅
machine_config_file	str or Path	Path to a file holding the paths to TW executables		✅
machine_name	str	Name of current machine. Must be a table name in machine_config_file. By default, do not provide it and let LightWin handle this part.		❌
simulation_type	str	A key in the machine_config.toml file		✅
tool	str	Name of the tool.	(‘TraceWin’, ‘tracewin’)	✅

Check TraceWin’s documentation for the list of command line arguments. Note that you also need to create a configuration file that will define the path to the TraceWin executables. See data/examples/machine_config_file.toml for an example.

The [beam_calculator_post] follows the same format. It is used to store a second BeamCalculator. This is mainly useful for defining a more precise – but more time-consuming – beam dynamics tool, for example to check your compensation settings.