PICA

Polarized ICS Calculator

Simulate ICS gamma photon spectra for the LUXE experiment https://arxiv.org/abs/2102.02032.

Input files in yaml format

Output files in PTARMIGAN-hdf5 format: https://github.com/tgblackburn/ptarmigan

Source

https://github.com/hixps/pica

Dependencies

• python >= 3.10
• numpy
• 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()

Changelog

• v1.2.0

  • linear laser polarization and linear Stokes parameters of gamma rays

• v1.2.1

  • laser polarization control via polarization angle (only LP, 100% polarization degree)
  • "Full" polarized cross section based on Jauch-Rohrlich expression with explicit polarization vectors
  • Analysis routines for rotating Stokes vectors from scattering plane to laboratory frame

• v1.2.2

  • partially polarized laser

• v1.2.3

  • software rename luxeics -> pica

• 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

• v1.2.5

  • Stokes parameters in the x-z plane are now standard
  • Implemented methods to calculate Stokes parameters in scattering plane

• v1.2.8

  • self.number_electrons
  • cross section normalization benchmarked against PTARMIGAN

• v1.2.9

  • fixed the setup