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.

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.