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pica

Polarized ICS Calculator

Monte Carlo code for the simulation of Inverse Compton Scattering gamma-ray spectra including the photon polarization. The primary usage is for the LUXE experiment https://arxiv.org/abs/2102.02032.

Source

https://github.com/hixps/pica

Dependencies

  • python >= 3.10
  • numpy >= 2.0
  • scipy
  • h5py
  • pyyaml
  • dacite

Installation

pip install <path to pica source>

or

pip install git+https://github.com/hixps/pica.git

Useage

import pica

SIM = pica.ICSSimulation( input_filename='input_file' )
SIM.run()

Input

Input files for configuring the simulation in the yaml format.

Output

Simulation output files are hdf5 in PTARMIGAN-compatible format: https://github.com/tgblackburn/ptarmigan

Changelog

  • v1.2.9
    • fixed the setup
  • v1.2.8
    • self.number_electrons
    • cross section normalization benchmarked against PTARMIGAN
  • v1.2.5
    • Stokes parameters in the x-z plane are now standard
    • Implemented methods to calculate Stokes parameters in scattering plane
  • v1.2.4
    • switched Stokes parameter definition to S3=circular
    • Stokes parameter S0=1 for consistency with PTARMIGAN
    • rename 'Stokes' group in hdf5 output to 'polarization'
    • switched to 'pulse_rescale_bias' instead of 'sigma_rescaling' parameter
    • record units of output, unit section in input file
      • config/unit/position = ('micron')
      • config/unit/momentum = ('eV','keV','MeV','GeV')
    • pulse length parameter renamed to TFWHM
    • cleanup of old cross sections, only Cross_Section_Full useable