Two-dimensional AXUV-based radiated power density diagnostics on NSTX-U

Faust, I.; Delgado-Aparicio, L.; Bell, R. E.; Tritz, K.; Diallo, A.; Gerhardt, S. P.; LeBlanc, B.; Kozub, T. A.; Parker, R. R.; Stratton, B. C.

doi:10.7910/DVN/ZSKSNP

Title: Two-dimensional AXUV-based radiated power density diagnostics on NSTX-U

Abstract

A new set of radiated-power-density diagnostics for the National Spherical Torus Experiment Upgrade (NSTX-U) tokamak have been designed to measure the two-dimensional poloidal structure of the total photon emissivity profile in order to perform power balance, impurity transport, and magnetohydrodynamic studies. Multiple AXUV-diode based pinhole cameras will be installed in the same toroidal angle at various poloidal locations. The local emissivity will be obtained from several types of tomographic reconstructions. The layout and response expected for the new radially viewing poloidal arrays will be shown for different impurity concentrations to characterize the diagnostic sensitivity. The radiated power profile inverted from the array data will also be used for estimates of power losses during transitions from various divertor configurations in NSTX-U. The effect of in-out and top/bottom asymmetries in the core radiation from high-Z impurities will be addressed.

Authors:: Faust, I.; Delgado-Aparicio, L.; Bell, R. E.; Tritz, K.; Diallo, A.; Gerhardt, S. P.; LeBlanc, B.; Kozub, T. A.; Parker, R. R.; Stratton, B. C.

Publication Date:: 2019-01-10

DOE Contract Number:: FC02-99ER54512; AC02-09CH11466

Research Org.:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center; Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

OSTI Identifier:: 1880848

DOI:: https://doi.org/10.7910/DVN/ZSKSNP

Citation Formats


                    Faust, I., Delgado-Aparicio, L., Bell, R. E., Tritz, K., Diallo, A., Gerhardt, S. P., LeBlanc, B., Kozub, T. A., Parker, R. R., and Stratton, B. C. Two-dimensional AXUV-based radiated power density diagnostics on NSTX-U.  United States: N. p., 2019. 
        Web.  doi:10.7910/DVN/ZSKSNP.

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                    Faust, I., Delgado-Aparicio, L., Bell, R. E., Tritz, K., Diallo, A., Gerhardt, S. P., LeBlanc, B., Kozub, T. A., Parker, R. R., & Stratton, B. C. Two-dimensional AXUV-based radiated power density diagnostics on NSTX-U.  United States.  doi:https://doi.org/10.7910/DVN/ZSKSNP

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                    Faust, I., Delgado-Aparicio, L., Bell, R. E., Tritz, K., Diallo, A., Gerhardt, S. P., LeBlanc, B., Kozub, T. A., Parker, R. R., and Stratton, B. C. 2019.  
"Two-dimensional AXUV-based radiated power density diagnostics on NSTX-U".  United States.  doi:https://doi.org/10.7910/DVN/ZSKSNP.  https://www.osti.gov/servlets/purl/1880848. Pub date:Thu Jan 10 00:00:00 EST 2019

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@article{osti_1880848,

  title        = {Two-dimensional AXUV-based radiated power density diagnostics on NSTX-U},

  author       = {Faust, I. and Delgado-Aparicio, L. and Bell, R. E. and Tritz, K. and Diallo, A. and Gerhardt, S. P. and LeBlanc, B. and Kozub, T. A. and Parker, R. R. and Stratton, B. C.},

  abstractNote = {A new set of radiated-power-density diagnostics for the National Spherical Torus Experiment Upgrade (NSTX-U) tokamak have been designed to measure the two-dimensional poloidal structure of the total photon emissivity profile in order to perform power balance, impurity transport, and magnetohydrodynamic studies. Multiple AXUV-diode based pinhole cameras will be installed in the same toroidal angle at various poloidal locations. The local emissivity will be obtained from several types of tomographic reconstructions. The layout and response expected for the new radially viewing poloidal arrays will be shown for different impurity concentrations to characterize the diagnostic sensitivity. The radiated power profile inverted from the array data will also be used for estimates of power losses during transitions from various divertor configurations in NSTX-U. The effect of in-out and top/bottom asymmetries in the core radiation from high-Z impurities will be addressed.},

  doi          = {10.7910/DVN/ZSKSNP},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {2019},

  month        = {1}

}

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