Laser-modulation

This python code simulates laser-electron interaction in an undulator field, defined by user.

Input files

The file .LTT defines the properties of the undulator magnetic field used in the simulation. The parameters included in this file are:

Below are only valid when defining SPEED_Lattice object

The file .LSR defines the properties of the laser used in the simulation. The parameters are:

WL: Wavelength of the laser in meters.
SIG_X: Sigma width at focus in meters (X-direction).
SIG_Y: Sigma width at focus in meters (Y-direction).
T_FWHM: Full width at half maximum (FWHM) of the temporal profile in seconds.
E: Pulse energy of the laser in joules.
FOCUS: Focus distance of the laser from the beginning of the defined magnetic field in meters.
X0: Initial position in the X-direction.
Z_OFFSET: Pulse offset in the Z-direction.
M2: Beam quality parameter.
PULSED: Boolean indicating whether the laser is pulsed (True/False).
PHI: Spectral phase of the laser, quantifying the frequency chirp.

To use the input files, adjust the parameters to match the desired lattice and laser properties for your simulation.

For normal undulators, use the Modulator object, specifying the filename of the LTT file as a parameter.
Alternatively, define a lattice using a user-defined field file (.txt). The file should have two columns: the first column indicates the z position in millimeters, and the second column indicates the vertical magnetic field in Tesla, separated by a tab.
For the special Modulator-Chicane-Modulator-Chicane-Radiator configuration used in the EEHG project named SPEED at DELTA, TU Dortmund, use the SPEED_Lattice object. This object also requires the LTT file as input, along with additional parameters. (link to the paper)