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Title: Status of the design of the ITER ECE diagnostic

Abstract

In this study, the baseline design for the ITER electron cyclotron emission (ECE) diagnostic has entered the detailed preliminary design phase. Two plasma views are planned, a radial view and an oblique view that is sensitive to distortions in the electron momentum distribution near the average thermal momentum. Both views provide high spatial resolution electron temperature profiles when the momentum distribution remains Maxwellian. The ECE diagnostic system consists of the front-end optics, including two 1000 K calibration sources, in equatorial port plug EP9, the 70-1000 GHz transmission system from the front-end to the diagnostics hall, and the ECE instrumentation in the diagnostics hall. The baseline ECE instrumentation will include two Michelson interferometers that can simultaneously measure ordinary and extraordinary mode ECE from 70 to 1000 GHz, and two heterodyne radiometer systems, covering 122-230 GHz and 244-355 GHz. Significant design challenges include 1) developing highly-reliable 1000 K calibration sources and the associated shutters/mirrors, 2) providing compliant couplings between the front-end optics and the polarization splitter box that accommodate displacements of the vacuum vessel during plasma operations and bake out, 3) protecting components from damage due to stray ECH radiation and other intense millimeter wave emission and 4) providing the low-loss broadbandmore » transmission system.« less

Authors:
 [1];  [2];  [2];  [3];  [4];  [1];  [5];  [6];  [1];  [3];  [3];  [3];  [2];  [3];  [2];  [1];  [2];  [7];  [7];  [7] more »; « less
+ Show Author Affiliations
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Univ. of Texas, Austin, TX (United States)
  3. ITER-India/Institute for Plasma Research, Gandhinagar (India)
  4. Univ. of Maryland, College Park, MD (United States)
  5. Virginia Diodes, Inc., Charlottesville, VA (United States)
  6. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  7. ITER Organization, St. Paul Lez Durance (France)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1148889
Report Number(s):
PPPL-5026
Journal ID: ISSN 2100-014X; PII: epjconf_ec2015_03002; TRN: US1500454
Grant/Contract Number:  
AC02-09CH11466
Resource Type:
Accepted Manuscript
Journal Name:
EPJ Web of Conferences
Additional Journal Information:
Journal Volume: 87; Conference: 18th Joint Workshop on Electron Cyclotron Emmision and Electron Cyclotron Resonance Heating, Nara (Japan), Apr 2014; Journal ID: ISSN 2100-014X
Publisher:
EDP Sciences
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Taylor, G., Austin, M. E., Beno, J. H., Danani, S., Ellis, R. F., Feder, R., Hesler, J. L., Hubbard, A. E., Johnson, D. W., Kumar, R., Kumar, S., Kumar, V., Ouroua, A., Pandya, H. K. B., Phillips, P. E., Roman, C., Rowan, W. L., Udintsev, V., Vayakis, G., Walsh, M., and Kubo, S. Status of the design of the ITER ECE diagnostic. United States: N. p., 2015. Web. doi:10.1051/epjconf/20158703002.
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Taylor, G., Austin, M. E., Beno, J. H., Danani, S., Ellis, R. F., Feder, R., Hesler, J. L., Hubbard, A. E., Johnson, D. W., Kumar, R., Kumar, S., Kumar, V., Ouroua, A., Pandya, H. K. B., Phillips, P. E., Roman, C., Rowan, W. L., Udintsev, V., Vayakis, G., Walsh, M., & Kubo, S. Status of the design of the ITER ECE diagnostic. United States. https://doi.org/10.1051/epjconf/20158703002
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Taylor, G., Austin, M. E., Beno, J. H., Danani, S., Ellis, R. F., Feder, R., Hesler, J. L., Hubbard, A. E., Johnson, D. W., Kumar, R., Kumar, S., Kumar, V., Ouroua, A., Pandya, H. K. B., Phillips, P. E., Roman, C., Rowan, W. L., Udintsev, V., Vayakis, G., Walsh, M., and Kubo, S. Thu . "Status of the design of the ITER ECE diagnostic". United States. https://doi.org/10.1051/epjconf/20158703002. https://www.osti.gov/servlets/purl/1148889.
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@article{osti_1148889,
title = {Status of the design of the ITER ECE diagnostic},
author = {Taylor, G. and Austin, M. E. and Beno, J. H. and Danani, S. and Ellis, R. F. and Feder, R. and Hesler, J. L. and Hubbard, A. E. and Johnson, D. W. and Kumar, R. and Kumar, S. and Kumar, V. and Ouroua, A. and Pandya, H. K. B. and Phillips, P. E. and Roman, C. and Rowan, W. L. and Udintsev, V. and Vayakis, G. and Walsh, M. and Kubo, S.},
abstractNote = {In this study, the baseline design for the ITER electron cyclotron emission (ECE) diagnostic has entered the detailed preliminary design phase. Two plasma views are planned, a radial view and an oblique view that is sensitive to distortions in the electron momentum distribution near the average thermal momentum. Both views provide high spatial resolution electron temperature profiles when the momentum distribution remains Maxwellian. The ECE diagnostic system consists of the front-end optics, including two 1000 K calibration sources, in equatorial port plug EP9, the 70-1000 GHz transmission system from the front-end to the diagnostics hall, and the ECE instrumentation in the diagnostics hall. The baseline ECE instrumentation will include two Michelson interferometers that can simultaneously measure ordinary and extraordinary mode ECE from 70 to 1000 GHz, and two heterodyne radiometer systems, covering 122-230 GHz and 244-355 GHz. Significant design challenges include 1) developing highly-reliable 1000 K calibration sources and the associated shutters/mirrors, 2) providing compliant couplings between the front-end optics and the polarization splitter box that accommodate displacements of the vacuum vessel during plasma operations and bake out, 3) protecting components from damage due to stray ECH radiation and other intense millimeter wave emission and 4) providing the low-loss broadband transmission system.},
doi = {10.1051/epjconf/20158703002},
journal = {EPJ Web of Conferences},
number = ,
volume = 87,
place = {United States},
year = {Thu Mar 12 00:00:00 EDT 2015},
month = {Thu Mar 12 00:00:00 EDT 2015}
}
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https://doi.org/10.1051/epjconf/20158703002
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Works referenced in this record:

Importance of electron cyclotron wave energy transport in ITER
journal, June 2005

Development and testing of a fast Fourier transform high dynamic-range spectral diagnostics for millimeter wave characterization
journal, October 2009

  • Thoen, D. J.; Bongers, W. A.; Westerhof, E.
  • Review of Scientific Instruments, Vol. 80, Issue 10
  • DOI: 10.1063/1.3244091
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    Works referencing / citing this record:

    Modeling the electron cyclotron emission below the fundamental resonance in ITER
    journal, July 2019

    • Rasmussen, J.; Stejner, M.; Figini, L.
    • Plasma Physics and Controlled Fusion, Vol. 61, Issue 9
    • DOI: 10.1088/1361-6587/ab2f4a

    Terahertz Josephson spectral analysis and its applications
    journal, February 2017

    • Snezhko, A. V.; Gundareva, I. I.; Lyatti, M. V.
    • Superconductor Science and Technology, Vol. 30, Issue 4
    • DOI: 10.1088/1361-6668/aa5ab5
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