Investigation of ion and electron heat transport of high-Te ECH heated discharges in the large helical device
Abstract
An analysis of the radial electric field and heat transport, both for ions and electrons, is presented for a high-$${{T}_{\text{e}}}$$ electron cyclotron heated (ECH) discharge on the large helical device (LHD). Transport analysis is done using the task3d transport suite utilizing experimentally measured profiles for both ions and electrons. Ion temperature and perpendicular flow profiles are measured using the recently installed x-ray imaging crystal spectrometer diagnostic (XICS), while electron temperature and density profiles are measured using Thomson scattering. The analysis also includes calculated ECH power deposition profiles as determined through the travis ray-tracing code. This is the first time on LHD that this type of integrated transport analysis with measured ion temperature profiles has been performed without NBI, allowing the heat transport properties of plasmas with only ECH heating to be more clearly examined. For this study, a plasma discharge is chosen which develops a high central electron temperature ($${{T}_{\text{eo}}}=9$$ keV) at moderately low densities ($${{n}_{\text{eo}}}=1.5\times {{10}^{19}}$$ m-3). The experimentally determined transport properties from task3d are compared to neoclassical predictions as calculated by the gsrake and fortec-3d codes. The predicted electron fluxes are seen to be an order of magnitude less than the measured fluxes, indicating that electron transport is largely anomalous, while the neoclassical and measured ion heat fluxes are of the same magnitude. Neoclassical predictions of a strong positive ambipolar electric field ($${{E}_{\text{r}}}$$ ) in the plasma core are validated through comparisons to perpendicular flow measurements from the XICS diagnostic. Furthermore, this provides confidence that the predictions are producing physically meaningful results for the particle fluxes and radial electric field, which are a key component in correctly predicting plasma confinement.
- Authors:
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[1];
[1];
[1];
[1];
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- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- National Institute for Fusion Science, Gifu (Japan); SOKENDAI (The Graduate Univ. for Advanced Studies), Gifu (Japan)
- Max-Planck-Institut fur Plasmaphysik, Greifswald (Germany)
- National Institute for Fusion Science, Gifu (Japan)
- Research Organization for Information Science and Technology, Hyogo (Japan)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Contributing Org.:
- The LHD Experiment Group
- OSTI Identifier:
- 1255638
- Alternate Identifier(s):
- OSTI ID: 1236289
- Report Number(s):
- PPPL-5138
Journal ID: ISSN 0741-3335
- Grant/Contract Number:
- NIFS13KNST051; NIFS14KNTT025; AC02-09CH11466
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Plasma Physics and Controlled Fusion
- Additional Journal Information:
- Journal Volume: 58; Journal Issue: 4; Journal ID: ISSN 0741-3335
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; stellarator; transport; radial electric field; neoclassical; large helical device; x-ray imaging crystal spectrometer; core electron-root confinement
Citation Formats
Pablant, N. A., Satake, S., Yokoyama, M., Gates, D. A., Bitter, M., Bertelli, N., Delgado-Aparicio, L., Dinklage, A., Goto, M., Hill, K. W., Igamai, S., Kubo, S., Lazerson, S., Matsuoka, S., Mikkelsen, D. R., Morita, S., Oishi, T., Seki, R., Shimozuma, T., Suzuki, C., Suzuki, Y., Takahashi, H., Yamada, H., and Yoshimura, Y. Investigation of ion and electron heat transport of high-Te ECH heated discharges in the large helical device. United States: N. p., 2016.
Web. doi:10.1088/0741-3335/58/4/045004.
Pablant, N. A., Satake, S., Yokoyama, M., Gates, D. A., Bitter, M., Bertelli, N., Delgado-Aparicio, L., Dinklage, A., Goto, M., Hill, K. W., Igamai, S., Kubo, S., Lazerson, S., Matsuoka, S., Mikkelsen, D. R., Morita, S., Oishi, T., Seki, R., Shimozuma, T., Suzuki, C., Suzuki, Y., Takahashi, H., Yamada, H., & Yoshimura, Y. Investigation of ion and electron heat transport of high-Te ECH heated discharges in the large helical device. United States. https://doi.org/10.1088/0741-3335/58/4/045004
Pablant, N. A., Satake, S., Yokoyama, M., Gates, D. A., Bitter, M., Bertelli, N., Delgado-Aparicio, L., Dinklage, A., Goto, M., Hill, K. W., Igamai, S., Kubo, S., Lazerson, S., Matsuoka, S., Mikkelsen, D. R., Morita, S., Oishi, T., Seki, R., Shimozuma, T., Suzuki, C., Suzuki, Y., Takahashi, H., Yamada, H., and Yoshimura, Y. Thu .
"Investigation of ion and electron heat transport of high-Te ECH heated discharges in the large helical device". United States. https://doi.org/10.1088/0741-3335/58/4/045004. https://www.osti.gov/servlets/purl/1255638.
@article{osti_1255638,
title = {Investigation of ion and electron heat transport of high-Te ECH heated discharges in the large helical device},
author = {Pablant, N. A. and Satake, S. and Yokoyama, M. and Gates, D. A. and Bitter, M. and Bertelli, N. and Delgado-Aparicio, L. and Dinklage, A. and Goto, M. and Hill, K. W. and Igamai, S. and Kubo, S. and Lazerson, S. and Matsuoka, S. and Mikkelsen, D. R. and Morita, S. and Oishi, T. and Seki, R. and Shimozuma, T. and Suzuki, C. and Suzuki, Y. and Takahashi, H. and Yamada, H. and Yoshimura, Y.},
abstractNote = {An analysis of the radial electric field and heat transport, both for ions and electrons, is presented for a high-${{T}_{\text{e}}}$ electron cyclotron heated (ECH) discharge on the large helical device (LHD). Transport analysis is done using the task3d transport suite utilizing experimentally measured profiles for both ions and electrons. Ion temperature and perpendicular flow profiles are measured using the recently installed x-ray imaging crystal spectrometer diagnostic (XICS), while electron temperature and density profiles are measured using Thomson scattering. The analysis also includes calculated ECH power deposition profiles as determined through the travis ray-tracing code. This is the first time on LHD that this type of integrated transport analysis with measured ion temperature profiles has been performed without NBI, allowing the heat transport properties of plasmas with only ECH heating to be more clearly examined. For this study, a plasma discharge is chosen which develops a high central electron temperature (${{T}_{\text{eo}}}=9$ keV) at moderately low densities (${{n}_{\text{eo}}}=1.5\times {{10}^{19}}$ m-3). The experimentally determined transport properties from task3d are compared to neoclassical predictions as calculated by the gsrake and fortec-3d codes. The predicted electron fluxes are seen to be an order of magnitude less than the measured fluxes, indicating that electron transport is largely anomalous, while the neoclassical and measured ion heat fluxes are of the same magnitude. Neoclassical predictions of a strong positive ambipolar electric field (${{E}_{\text{r}}}$ ) in the plasma core are validated through comparisons to perpendicular flow measurements from the XICS diagnostic. Furthermore, this provides confidence that the predictions are producing physically meaningful results for the particle fluxes and radial electric field, which are a key component in correctly predicting plasma confinement.},
doi = {10.1088/0741-3335/58/4/045004},
journal = {Plasma Physics and Controlled Fusion},
number = 4,
volume = 58,
place = {United States},
year = {Thu Jan 28 00:00:00 EST 2016},
month = {Thu Jan 28 00:00:00 EST 2016}
}
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Works referenced in this record:
Development of Integrated Transport Analysis Suite for LHD Plasmas Towards Transport Model Validation and Increased Predictability
journal, January 2013
- Yokoyama, Masayuki; Suzuki, Chihiro; Seki, Ryosuke
- Plasma and Fusion Research, Vol. 8, Issue 0
Layout and results from the initial operation of the high-resolution x-ray imaging crystal spectrometer on the Large Helical Device
journal, August 2012
- Pablant, N. A.; Bitter, M.; Delgado-Aparicio, L.
- Review of Scientific Instruments, Vol. 83, Issue 8
Core electron-root confinement (CERC) in helical plasmas
journal, August 2007
- Yokoyama, M.; Maaßberg, H.; Beidler, C. D.
- Nuclear Fusion, Vol. 47, Issue 9
Formation of electron internal transport barrier and achievement of high ion temperature in Large Helical Device
journal, May 2003
- Takeiri, Y.; Shimozuma, T.; Kubo, S.
- Physics of Plasmas, Vol. 10, Issue 5
Formation of electron internal transport barriers by highly localized electron cyclotron resonance heating in the large helical device
journal, May 2003
- Shimozuma, T.; Kubo, S.; Idei, H.
- Plasma Physics and Controlled Fusion, Vol. 45, Issue 7
Characteristics of transport in electron internal transport barriers and in the vicinity of rational surfaces in the Large Helical Device
journal, May 2004
- Ida, K.; Inagaki, S.; Shimozuma, T.
- Physics of Plasmas, Vol. 11, Issue 5
Transition phenomena and thermal transport properties in LHD plasmas with an electron internal transport barrier
journal, October 2005
- Shimozuma, T.; Kubo, S.; Idei, H.
- Nuclear Fusion, Vol. 45, Issue 11
Formation of Electron-Root Radial Electric Field and its Effect on Thermal Transport in LHD High Te Plasma
journal, January 2013
- Matsuoka, Seikichi; Satake, Shinsuke; Takahashi, Hiromi
- Plasma and Fusion Research, Vol. 8, Issue 0
Extension of high T e regime with upgraded electron cyclotron resonance heating system in the Large Helical Device
journal, June 2014
- Takahashi, H.; Shimozuma, T.; Kubo, S.
- Physics of Plasmas, Vol. 21, Issue 6
Recent Progress of the LHD Thomson Scattering System
journal, August 2010
- Yamada, I.; Narihara, K.; Funaba, H.
- Fusion Science and Technology, Vol. 58, Issue 1
Ray Tracing Simulations of ECR Heating and ECE Diagnostic at W7-X Stellarator
journal, January 2007
- Marushchenko, Nikolai B.; Erckmann, Volker; Hartfuss, Hans J.
- Plasma and Fusion Research, Vol. 2
High Harmonic ECH Experiment for Extension of Heating Parameter Regime in LHD
journal, January 2013
- Shimozuma, Takashi; Takahashi, Hiromi; Kubo, Shin
- Plasma and Fusion Research, Vol. 8, Issue 0
Tomographic inversion techniques incorporating physical constraints for line integrated spectroscopy in stellarators and tokamaks
journal, November 2014
- Pablant, N. A.; Bell, R. E.; Bitter, M.
- Review of Scientific Instruments, Vol. 85, Issue 11
Incompressibility of impurity flows in low density TJ-II plasmas and comparison with neoclassical theory
journal, January 2013
- Arévalo, J.; Alonso, J. A.; McCarthy, K. J.
- Nuclear Fusion, Vol. 53, Issue 2
Far infrared laser interferometer system on the Large Helical Device
journal, January 1999
- Kawahata, K.; Tanaka, K.; Ito, Y.
- Review of Scientific Instruments, Vol. 70, Issue 1
Three-dimensional free boundary calculations using a spectral Green's function method
journal, December 1986
- Hirshman, S. P.; van RIJ, W. I.; Merkel, P.
- Computer Physics Communications, Vol. 43, Issue 1
Three-dimensional equilibrium reconstruction on the DIII-D device
journal, January 2015
- Lazerson, S. A.
- Nuclear Fusion, Vol. 55, Issue 2
ECH Power Deposition Study in the Collisionless Plasma of LHD
conference, January 2003
- Kubo, S.
- PLASMA PHYSICS: 11th International Congress on Plasma Physics: ICPP2002, AIP Conference Proceedings
Kinetic simulations of fast ions in stellarators
journal, July 2011
- Bustos, A.; Castejón, F.; Osakabe, M.
- Nuclear Fusion, Vol. 51, Issue 8
Bolometer diagnostics for one- and two-dimensional measurements of radiated power on the Large Helical Device
journal, May 2003
- Peterson, B. J.; Kostrioukov, A. Yu; Ashikawa, N.
- Plasma Physics and Controlled Fusion, Vol. 45, Issue 7
Radiated power distributions in impurity-seeded plasmas in LHD
journal, August 2015
- Morisaki, T.; Oyama, K.; Tamura, N.
- Journal of Nuclear Materials, Vol. 463
A general solution of the ripple-averaged kinetic equation (GSRAKE)
journal, April 1995
- Beidler, C. D.; D'haeseleer, W. D.
- Plasma Physics and Controlled Fusion, Vol. 37, Issue 4
An improved formulation of the ripple-averaged kinetic theory of neoclassical transport in stellarators
journal, July 2001
- Beidler, C. D.; Maaßberg, H.
- Plasma Physics and Controlled Fusion, Vol. 43, Issue 8
Non-local neoclassical transport simulation of geodesic acoustic mode
journal, October 2005
- Satake, S.; Okamoto, M.; Nakajima, N.
- Nuclear Fusion, Vol. 45, Issue 11
Neoclassical electron transport calculation by using δf Monte Carlo method
journal, March 2011
- Matsuoka, Seikichi; Satake, Shinsuke; Yokoyama, Masayuki
- Physics of Plasmas, Vol. 18, Issue 3
Benchmarking of the mono-energetic transport coefficients—results from the International Collaboration on Neoclassical Transport in Stellarators (ICNTS)
journal, June 2011
- Beidler, C. D.; Allmaier, K.; Isaev, M. Yu.
- Nuclear Fusion, Vol. 51, Issue 7
Experimental studies of the physical mechanism determining the radial electric field and its radial structure in a toroidal plasma
journal, August 1998
- Ida, Katsumi
- Plasma Physics and Controlled Fusion, Vol. 40, Issue 8
Toroidal flow and radial particle flux in tokamak plasmas
journal, August 2009
- Callen, J. D.; Cole, A. J.; Hegna, C. C.
- Physics of Plasmas, Vol. 16, Issue 8
Charge-exchange spectroscopy at the W7-AS stellarator employing a high-energy Li beam
journal, December 2002
- Ehmler, H.; Baldzuhn, J.; McCormick, K.
- Plasma Physics and Controlled Fusion, Vol. 45, Issue 1
The ‘electron-root’ feature in the WENDELSTEIN-7-AS stellarator with ECRH in O1-mode compared to X2-mode
journal, January 2006
- Romé, M.; Beidler, C. D.; Maaßberg, H.
- Plasma Physics and Controlled Fusion, Vol. 48, Issue 3
Works referencing / citing this record:
Stellarator Research Opportunities: A Report of the National Stellarator Coordinating Committee
journal, February 2018
- Gates, David A.; Anderson, David; Anderson, S.
- Journal of Fusion Energy, Vol. 37, Issue 1
Comparison of a 2D nonlocal transport model to ECRH experiments in LHD
journal, May 2019
- Maggs, J. E.; Morales, G. J.
- Physics of Plasmas, Vol. 26, Issue 5