Fast electron temperature measurements using a "multicolor" optical soft x-ray array

L. F. Delgado-Aparicio; D. Stutman; K. Tritz; M. Finkenthal; R. Bell; J. Hosea; R. Kaita; B. Leblanc; L. Roquemore; J. R. Wilson

doi:10.1063/1.2786034

Fast electron temperature measurements using a "multicolor" optical soft x-ray array

L. F. Delgado-Aparicio^*, D. Stutman, K. Tritz, M. Finkenthal, R. Bell, J. Hosea, R. Kaita, B. Leblanc, L. Roquemore, J. R. Wilson

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

A fast (≤0.1 ms) and compact "multicolor" scintillator-based optical soft x-ray (OSXR) array has been developed for time- and space-resolved measurements of the electron temperature [Te (R,t)] profiles in magnetically confined fusion plasmas. The 48-channel tangential multicolor OSXR prototype was tested on the National Spherical Torus Experiment. Each sight line views the same plasma volume at the midplane (0≤ra≤1), in three distinct energy ranges determined by beryllium foils with different thicknesses. A tangential view of the toroidally (circular) symmetric plasma allows an Abel inversion of the line-integrated SXR brightness to obtain the x-ray emissivity profiles which are then used to constrain the reconstruction of the fast Te (R,t). The first assessment of the electron temperature is obtained by modeling the slope of the continuum radiation with the ideal double-foil method using both the line-integrated intensity measurements as well as the inverted SXR emissivity profiles.

Original language	English
Article number	073304
Journal	Journal of Applied Physics
Volume	102
Issue number	7
DOIs	https://doi.org/10.1063/1.2786034
State	Published - 2007
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1063/1.2786034

Cite this

@article{e2dd62343ce24e38a917c9c34a6330d6,

title = "Fast electron temperature measurements using a {"}multicolor{"} optical soft x-ray array",

abstract = "A fast (≤0.1 ms) and compact {"}multicolor{"} scintillator-based optical soft x-ray (OSXR) array has been developed for time- and space-resolved measurements of the electron temperature [Te (R,t)] profiles in magnetically confined fusion plasmas. The 48-channel tangential multicolor OSXR prototype was tested on the National Spherical Torus Experiment. Each sight line views the same plasma volume at the midplane (0≤ra≤1), in three distinct energy ranges determined by beryllium foils with different thicknesses. A tangential view of the toroidally (circular) symmetric plasma allows an Abel inversion of the line-integrated SXR brightness to obtain the x-ray emissivity profiles which are then used to constrain the reconstruction of the fast Te (R,t). The first assessment of the electron temperature is obtained by modeling the slope of the continuum radiation with the ideal double-foil method using both the line-integrated intensity measurements as well as the inverted SXR emissivity profiles.",

author = "Delgado-Aparicio, {L. F.} and D. Stutman and K. Tritz and M. Finkenthal and R. Bell and J. Hosea and R. Kaita and B. Leblanc and L. Roquemore and Wilson, {J. R.}",

year = "2007",

doi = "10.1063/1.2786034",

language = "אנגלית",

volume = "102",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "7",

}

TY - JOUR

T1 - Fast electron temperature measurements using a "multicolor" optical soft x-ray array

AU - Delgado-Aparicio, L. F.

AU - Stutman, D.

AU - Tritz, K.

AU - Finkenthal, M.

AU - Bell, R.

AU - Hosea, J.

AU - Kaita, R.

AU - Leblanc, B.

AU - Roquemore, L.

AU - Wilson, J. R.

PY - 2007

Y1 - 2007

N2 - A fast (≤0.1 ms) and compact "multicolor" scintillator-based optical soft x-ray (OSXR) array has been developed for time- and space-resolved measurements of the electron temperature [Te (R,t)] profiles in magnetically confined fusion plasmas. The 48-channel tangential multicolor OSXR prototype was tested on the National Spherical Torus Experiment. Each sight line views the same plasma volume at the midplane (0≤ra≤1), in three distinct energy ranges determined by beryllium foils with different thicknesses. A tangential view of the toroidally (circular) symmetric plasma allows an Abel inversion of the line-integrated SXR brightness to obtain the x-ray emissivity profiles which are then used to constrain the reconstruction of the fast Te (R,t). The first assessment of the electron temperature is obtained by modeling the slope of the continuum radiation with the ideal double-foil method using both the line-integrated intensity measurements as well as the inverted SXR emissivity profiles.

AB - A fast (≤0.1 ms) and compact "multicolor" scintillator-based optical soft x-ray (OSXR) array has been developed for time- and space-resolved measurements of the electron temperature [Te (R,t)] profiles in magnetically confined fusion plasmas. The 48-channel tangential multicolor OSXR prototype was tested on the National Spherical Torus Experiment. Each sight line views the same plasma volume at the midplane (0≤ra≤1), in three distinct energy ranges determined by beryllium foils with different thicknesses. A tangential view of the toroidally (circular) symmetric plasma allows an Abel inversion of the line-integrated SXR brightness to obtain the x-ray emissivity profiles which are then used to constrain the reconstruction of the fast Te (R,t). The first assessment of the electron temperature is obtained by modeling the slope of the continuum radiation with the ideal double-foil method using both the line-integrated intensity measurements as well as the inverted SXR emissivity profiles.

UR - http://www.scopus.com/inward/record.url?scp=35348877340&partnerID=8YFLogxK

U2 - 10.1063/1.2786034

DO - 10.1063/1.2786034

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:35348877340

SN - 0021-8979

VL - 102

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 7

M1 - 073304

ER -

Fast electron temperature measurements using a "multicolor" optical soft x-ray array

Abstract

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this