# propBG: A program for calculating the intensity and the far-field profile of harmonics emitted by a dilute gas irradiated by an intense Gaussian or Bessel–Gauss laser beam

## Description

Abstract Using the Green's function of the scalar wave equation, the program propBG computes and analyzes the far-field amplitude of the harmonics generated when a linearly polarized Gaussian or Bessel–Gauss beam of order zero passes through a dilute gaseous atomic target. The user must supply the relevant atomic data, namely the intensity-dependent atomic dipole moments, linear atomic susceptibilities (both at the fundamental and the harmonic frequencies), and photoionization rate. Target depletion a... Title of program: propBG Catalogue Id: ADLO_v1_0 Nature of problem The program calculates conversion efficiencies and spatio-temporal far-field profiles of harmonics generated by a gaseous target irradiated by an intense Gaussian or Bessel-Gauss beam, given the relevant atomic data. Versions of this program held in the CPC repository in Mendeley Data ADLO_v1_0; propBG; 10.1016/S0010-4655(99)00493-2 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)