Spectral distribution and flux of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e1480" altimg="si31.svg"><mml:mi>γ</mml:mi></mml:math>-ray beams produced through Compton scattering of unsynchronized laser and electron beams

Intense, quasi-monochromatic, polarized $\gamma$-ray beams produced by Compton scattering of laser photons against relativistic electrons are used for fundamental studies and applications. Following a series photoneutron cross section measurements in the Giant Dipole Resonance energy region performed at NewSUBARU synchrotron radiation facility, we have developed eliLaBr Monte Carlo simulation code characterization scattered photon beams. The is implemented using Geant4 available on GitHub repository (https://github.com/dan-mihai-filipescu/eliLaBr). Here report validation LCS beam flux spectral distribution data two applications with it asymmetric transverse emittance profiles electron beams, characteristic synchrotrons. first application based systematic investigation collimator offsets relative to axis. We show that maximum altered vertical offsets, where edge shifts towards lower energies increase offset. Secondly, code, investigate effect polarization plane orientation properties that: 1. use vertically lasers contributes preservation increasing precision alignment. 2. Under identical conditions phase-space distributions, spectrum changes orientation: slightly deteriorates resolution.