X-Ray Spectroscopic Imaging of Tokamaks with Photon-Counting Hybrid Pixel Array Detectors (PAD)

POSTER

Abstract

Hybrid PADs, such as Pilatus (www.dectris.com) offer the possibility of 1D and 2D x-ray spectroscopic imaging of tokamaks with good spatial and temporal resolution, using pinhole x-ray cameras. These cameras can be either radially viewing (1D) or tangentially viewing (2D), and can provide fast profiles of electron temperature, impurity concentration and transport, and non-thermal electron distributions. Each pixel counts x-ray photons having energy above a threshold value, and different groups of pixels are set to different thresholds to provide spectral discrimination. X-ray camera designs, simulations of performance, and progress on energy- threshold calibration on a per-pixel basis will be presented.

*Supported by US DoE under contract DE-AC02-09CH11466.

Authors

  • K. Hill

    • Princeton Plasma Physics Laboratory
    • PPPL
    • Princeton University, PPPL

  • M. Bitter

    • Princeton University, PPPL

  • L. Delgado-Aparicio

    • PPPL, Princeton, NJ, USA
    • PPPL
    • Princeton University, PPPL
    • Princeton Plasma Physics Laboratory

  • N. Pablant

    • Princeton University, PPPL
    • Princeton Plasma Physics Laboratory

  • P. Beiersdorfer

    • Lawrence Livermore National Laboratory
    • LLNL

  • M. Reinke

    • MIT Plasma Science \& Fusion Center, Cambridge, MA~02139
    • MIT, PSFC
    • MIT PSFC
    • Plasma Science Fusion Center, MIT

  • Yuri Podpaly

    • MIT-PSFC
    • MIT, PSFC
    • MIT PSFC

  • J. Rice

    • MIT-PSFC
    • MIT, PSFC
    • MIT PSFC
    • Plasma Science Fusion Center, MIT

  • S.G. Lee

    • NFRI, Korea
    • NFRI

  • Y. Shi

    • EAST, ASIPP, China

  • Ch. Broennimann

    • Dectris, Ltd.

  • E. Eikenberry

    • Dectris, Ltd.