31 July 2016 to 5 August 2016
Gaylord Hotel and Conference Center
US/Eastern timezone

Production of High Energy MeV Gamma Rays through Inverse Compton Scattering

2 Aug 2016, 16:00
15m
Woodrow Wilson CD (Gaylord Hotel)

Woodrow Wilson CD

Gaylord Hotel

Oral Working Group 7 WG1

Speaker

Keegan Behm (University of Michigan)

Abstract

Here we present data showing the production of gamma rays around 100 MeV through inverse Compton scattering of a LWFA electron beam. We collided an 800 MeV electron beam with a counter-propagating pulse with a maximum a$_0$ of 20. A CsI crystal array was used to detect the high energy gamma rays and provide information about the penetration depth and divergence. We analyze and present correlations with charge, maximum electron energy and overlap.

Summary

Here we present data showing the production of gamma rays as high as 100 MeV through inverse Compton scattering of a laser wakefield accelerated (LWFA) electron beam. At the Astra-Gemini laser system at Rutherford Appleton Labs (RAL), we collided an 800 MeV electron beam with a counter-propagating ultra-short pulse with a maximum a$_{0}$ of 20. A CsI crystal array positioned parallel to the photon beam was used to detect the high energy gamma rays and provide information about the penetration depth of the gammas and the vertical divergence. We analyze and present photon flux correlations with electron charge, maximum electron energy and laser-electron beam overlap. Having the detector positioned in such a way that it was parallel to the beam allows us to see how deep the gamma rays penetrated into the material. We are confident that the resulting data is not just bremsstrahlung because the increase in photon flux only occurred when the secondary beam line was activated.

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Primary author

Keegan Behm (University of Michigan)

Co-authors

Dr. Alexander Thomas (Lancaster University) Dr. Chris Murphy (The University of York) Mr. Chris Ridgers (The University of York) Mr. Elias Gerstamyr (Imperial College of London) Mr. Jason Cole (Imperial College of London) Mr. Jonathan Wood (Imperial College of London) Prof. Karl Krushelnick (University of Michigan) Dr. Stuart Mangles (Imperial College of London)

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