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Title: Charge exchange recombination spectroscopy at Wendelstein 7-X

Abstract

The Charge Exchange Recombination Spectroscopy (CXRS) diagnostic has become a routine diagnostic on almost all major high temperature fusion experimental devices. For the optimized stellarator Wendelstein 7-X (W7-X), a highly flexible and extensive CXRS diagnostic has been built to provide high-resolution local measurements of several important plasma parameters using the recently commissioned neutral beam heating. This paper outlines the design specifics of the W7-X CXRS system and gives examples of the initial results obtained, to include typical ion temperature profiles for several common heating scenarios, toroidal flow and radial electric field derived from velocity measurements, beam attenuation via beam emission spectra, and normalized impurity density profiles under some typical plasma conditions.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [3];  [1];  [3]; ORCiD logo [5];  [1];  [1] more »;  [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1] « less
+ Show Author Affiliations
  1. Max-Planck Inst. für Plasmaphysik, Greifswald (Germany)
  2. CIEMAT, Madrid (Spain)
  3. Eindhoven Univ. of Technology (The Netherlands)
  4. Max-Planck Institut für Plasmaphysik, 85748 Garching, Germany
  5. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE; Euratom Research and Training Programme
Contributing Org.:
W7-X Team
OSTI Identifier:
1616951
Grant/Contract Number:  
AC02-09CH11466; 633053
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 91; Journal Issue: 2; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; Emission spectroscopy; Plasma properties and parameters; Tokamaks; Optical devices; Charge exchange recombination spectroscopy; Optical fibers; Lenses; Stellarators

Citation Formats

Ford, O. P., Vanó, L., Alonso, J. A., Baldzuhn, J., Beurskens, M. N. A., Biedermann, C., Bozhenkov, S. A., Fuchert, G., Geiger, B., Hartmann, D., Jaspers, R. J. E., Kappatou, A., Langenberg, A., Lazerson, S. A., McDermott, R. M., McNeely, P., Neelis, T. W. C., Pablant, N. A., Pasch, E., Rust, N., Schroeder, R., Scott, E. R., Smith, H. M., Wegner, Th., Kunkel, F., and Wolf, R. C. Charge exchange recombination spectroscopy at Wendelstein 7-X. United States: N. p., 2020. Web. https://doi.org/10.1063/1.5132936.
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Ford, O. P., Vanó, L., Alonso, J. A., Baldzuhn, J., Beurskens, M. N. A., Biedermann, C., Bozhenkov, S. A., Fuchert, G., Geiger, B., Hartmann, D., Jaspers, R. J. E., Kappatou, A., Langenberg, A., Lazerson, S. A., McDermott, R. M., McNeely, P., Neelis, T. W. C., Pablant, N. A., Pasch, E., Rust, N., Schroeder, R., Scott, E. R., Smith, H. M., Wegner, Th., Kunkel, F., & Wolf, R. C. Charge exchange recombination spectroscopy at Wendelstein 7-X. United States. https://doi.org/10.1063/1.5132936
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Ford, O. P., Vanó, L., Alonso, J. A., Baldzuhn, J., Beurskens, M. N. A., Biedermann, C., Bozhenkov, S. A., Fuchert, G., Geiger, B., Hartmann, D., Jaspers, R. J. E., Kappatou, A., Langenberg, A., Lazerson, S. A., McDermott, R. M., McNeely, P., Neelis, T. W. C., Pablant, N. A., Pasch, E., Rust, N., Schroeder, R., Scott, E. R., Smith, H. M., Wegner, Th., Kunkel, F., and Wolf, R. C. Thu . "Charge exchange recombination spectroscopy at Wendelstein 7-X". United States. https://doi.org/10.1063/1.5132936. https://www.osti.gov/servlets/purl/1616951.
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@article{osti_1616951,
title = {Charge exchange recombination spectroscopy at Wendelstein 7-X},
author = {Ford, O. P. and Vanó, L. and Alonso, J. A. and Baldzuhn, J. and Beurskens, M. N. A. and Biedermann, C. and Bozhenkov, S. A. and Fuchert, G. and Geiger, B. and Hartmann, D. and Jaspers, R. J. E. and Kappatou, A. and Langenberg, A. and Lazerson, S. A. and McDermott, R. M. and McNeely, P. and Neelis, T. W. C. and Pablant, N. A. and Pasch, E. and Rust, N. and Schroeder, R. and Scott, E. R. and Smith, H. M. and Wegner, Th. and Kunkel, F. and Wolf, R. C.},
abstractNote = {The Charge Exchange Recombination Spectroscopy (CXRS) diagnostic has become a routine diagnostic on almost all major high temperature fusion experimental devices. For the optimized stellarator Wendelstein 7-X (W7-X), a highly flexible and extensive CXRS diagnostic has been built to provide high-resolution local measurements of several important plasma parameters using the recently commissioned neutral beam heating. This paper outlines the design specifics of the W7-X CXRS system and gives examples of the initial results obtained, to include typical ion temperature profiles for several common heating scenarios, toroidal flow and radial electric field derived from velocity measurements, beam attenuation via beam emission spectra, and normalized impurity density profiles under some typical plasma conditions.},
doi = {10.1063/1.5132936},
journal = {Review of Scientific Instruments},
number = 2,
volume = 91,
place = {United States},
year = {2020},
month = {2}
}
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