X-Ray Spectrum Reconstruction using an Attenuating Filter Pack

POSTER

Abstract

A technique to reconstruct the energy distribution of 1-10 MeV X-Rays produced by the Thomson backscattering of laser-plasma accelerator driven electrons upon a powerful laser pulse will be presented. By using an attenuator filter pack, the relative photon transmission signals can be estimated from a pixelated scintillator output and combined to deduce primary spectrum characteristics of the emitted radiation. Performed on a shot-to-shot basis and supported with electron distribution data from a magnetic spectrometer, this technique can be used to provide real-time feedback of the backscattering interaction. Analytic proof of concept will be shown, and an experimental design and limitations will be discussed.

* Supported by the U.S. Department of Energy, NNSA DNN R&D and SC HEP under Contract No. DE-AC02-05CH11231.

Authors

  • Alexander Laut

    LBNL, Lawrence Berkeley National Laboratory

  • Hai-En Tsai

    Lawrence Berkeley National Laboratory, LBNL, BELLA Center, Lawrence Berkeley National Laboratory

  • Tobias Ostermayr

    LBNL, Lawrence Berkeley National Laboratory

  • Robert Jacob

    UCB; LBNL, Lawrence Berkeley National Laboratory

  • Liona Fan-Chiang

    UCB; LBNL, Lawrence Berkeley National Laboratory

  • Ocean Zhou

    Lawrence Berkeley National Laboratory

  • Cameron Geddes

    Lawrence Berkeley National Laboratory, LBNL, Berkeley National Laboratory, BELLA Center, Lawrence Berkeley National Laboratory

  • Carl Schroeder

    Lawrence Berkeley National Laboratory, UCB; LBNL, Berkeley National Laboratory, BELLA Center, Lawrence Berkeley National Laboratory

  • Eric Esarey

    Lawrence Berkeley National Laboratory, LBNL, Berkeley National Laboratory