Title
Simulation, design, and first test of a multi-energy soft x-ray (SXR) pinhole camera in the Madison Symmetric Torus (MST)
Date Issued
01 October 2018
Access level
metadata only access
Resource Type
conference paper
Author(s)
Wallace J.
Yamazaki H.
Vanmeter P.
Reusch L.
Nornberg M.
Almagari A.
Maddox J.
Luethi B.
Rissi M.
Donath T.
Den Hartog D.
Sarff J.
Weix P.
Goetz J.
Pablant N.
Hill K.
Stratton B.
Efthimion P.
Takase Y.
Ejiri A.
Ono M.
Princeton University
Publisher(s)
American Institute of Physics Inc.
Abstract
A multi-energy soft x-ray pinhole camera has been designed and built for the Madison Symmetric Torus reversed field pinch to aid the study of particle and thermal-transport, as well as MHD stability physics. This novel imaging diagnostic technique combines the best features from both pulse-height-analysis and multi-foil methods employing a PILATUS3 x-ray detector in which the lower energy threshold for photon detection can be adjusted independently on each pixel. Further improvements implemented on the new cooled systems allow a maximum count rate of 10 MHz per pixel and sensitivity to the strong Al and Ar emission between 1.5 and 4 keV. The local x-ray emissivity will be measured in multiple energy ranges simultaneously, from which it is possible to infer 1D and 2D simultaneous profile measurements of core electron temperature and impurity density profiles with no a priori assumptions of plasma profiles, magnetic field reconstruction constraints, high-density limitations, or need of shot-to-shot reproducibility. The expected time and space resolutions will be 2 ms and <1 cm, respectively.
Volume
89
Issue
10
Language
English
OCDE Knowledge area
Física de plasmas y fluídos
Óptica
Scopus EID
2-s2.0-85054800665
PubMed ID
ISSN of the container
00346748
Conference
Review of Scientific Instruments
Sponsor(s)
This work is supported by the U.S. DOE-OFES under Contract No. DE-AC02-09CH11466 and LFDA’s 2015 DOE Early Career Award Research Program.
Sources of information:
Directorio de Producción Científica
Scopus