Syed LCS G4ModelPaper

LCS in G4

describe below the performance of the Compton scattering models in G4 and motivate reference frame boost approach.

Abstract

Tunable and quasi-monochromatic laser Compton scattered (LCS) X-rays are produced as a result of the interaction between accelerated electrons and a laser beam. The energy tunability of LCS X-rays is dependent on incoming electron and laser beam energies. The quasi-monochromatic nature of LCS X-rays offer much better signal-to-noise ratios, both qualitatively and quantitatively, for radiography applications then conventional X-ray tubes. This results in significantly lower dose per image both to the object/patient and workers. Previously, two sharp 20.94 keV and 98.4 keV LCS peaks were produced at the Idaho Accelerator Center (IAC) in two separate experiments based on electron beams tuned at ~34 MeV and ~37 MeV, that were brought in collision with a peak power (peak power = 4 GW) Nd:YAG laser operating at 1064 nm and 266 nm wavelengths. The electron linear accelerator (linac) was operating at 60 Hz with an electron beam pulse length of about 50 ps and a peak current of about 7 Amps. A simulation has been performed using a Geant4 Monte Carlo simulation toolkit to further understand features of the experimental yield, such as the influence of the energy distribution of the incoming electron beam. A comparison between simulated and experimental LCS X-rays of ~20 keV and ~98 keV as well as radiographic images of fish and lead samples will be shown.

Acknowledgements. The authors gratefully acknowledge the support of this project from the Department of Defense (DOD) under contract, DOD#FA8650-04-2-6541.

Introduction

Theory

Klein-Nishina

References

1.) Klein Nishina

2.) GEANT4

3.) Reference for GEANT4 Compton scattering Model

Stepanek NIMA 412 1998pg174.pdf say

BNL-47503

BNL-

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