Effect of wall boundary on the scrape-off layer losses of high harmonic fast wave in NSTX and NSTX-U
Abstract
We perform numerical simulations of high harmonic fast waves (HHFWs) in the scrape-off-layer (SOL) of National Spherical Torus Experiment (NSTX)/NSTX-U using a recently developed 2D full wave code. We particularly show that a realistic NSTX SOL boundary can significantly affect HHFW propagation and power losses in the SOL. In NSTX SOL boundaries, HHFW is easily localized near the antenna and propagates less to the SOL, and thus, less power is lost to the SOL. Here, we also show that the lower SOL power losses occur when the SOL volume is smaller and the distance between the last closed flux surface and the antenna is shorter. We investigate the effect of electron density in front of the antenna and the ambient magnetic field strengths on the SOL power losses as well. Showing consistency with the experiments, SOL losses are minimized when the SOL density is near the critical density where the fast wave cutoff is open, and the plasma is strongly magnetized.
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1559005
- Alternate Identifier(s):
- OSTI ID: 1524457
- Grant/Contract Number:
- AC02-09CH11466; AT1030200
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 26; Journal Issue: 6; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Kim, Eun -Hwa, Bertelli, Nicola, Ono, Masayuki, Valeo, Ernest J., Hosea, Joel C., and Perkins, Rory J. Effect of wall boundary on the scrape-off layer losses of high harmonic fast wave in NSTX and NSTX-U. United States: N. p., 2019.
Web. doi:10.1063/1.5091579.
Kim, Eun -Hwa, Bertelli, Nicola, Ono, Masayuki, Valeo, Ernest J., Hosea, Joel C., & Perkins, Rory J. Effect of wall boundary on the scrape-off layer losses of high harmonic fast wave in NSTX and NSTX-U. United States. https://doi.org/10.1063/1.5091579
Kim, Eun -Hwa, Bertelli, Nicola, Ono, Masayuki, Valeo, Ernest J., Hosea, Joel C., and Perkins, Rory J. Tue .
"Effect of wall boundary on the scrape-off layer losses of high harmonic fast wave in NSTX and NSTX-U". United States. https://doi.org/10.1063/1.5091579. https://www.osti.gov/servlets/purl/1559005.
@article{osti_1559005,
title = {Effect of wall boundary on the scrape-off layer losses of high harmonic fast wave in NSTX and NSTX-U},
author = {Kim, Eun -Hwa and Bertelli, Nicola and Ono, Masayuki and Valeo, Ernest J. and Hosea, Joel C. and Perkins, Rory J.},
abstractNote = {We perform numerical simulations of high harmonic fast waves (HHFWs) in the scrape-off-layer (SOL) of National Spherical Torus Experiment (NSTX)/NSTX-U using a recently developed 2D full wave code. We particularly show that a realistic NSTX SOL boundary can significantly affect HHFW propagation and power losses in the SOL. In NSTX SOL boundaries, HHFW is easily localized near the antenna and propagates less to the SOL, and thus, less power is lost to the SOL. Here, we also show that the lower SOL power losses occur when the SOL volume is smaller and the distance between the last closed flux surface and the antenna is shorter. We investigate the effect of electron density in front of the antenna and the ambient magnetic field strengths on the SOL power losses as well. Showing consistency with the experiments, SOL losses are minimized when the SOL density is near the critical density where the fast wave cutoff is open, and the plasma is strongly magnetized.},
doi = {10.1063/1.5091579},
journal = {Physics of Plasmas},
number = 6,
volume = 26,
place = {United States},
year = {Tue Jun 04 00:00:00 EDT 2019},
month = {Tue Jun 04 00:00:00 EDT 2019}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Cited by: 7 works
Citation information provided by
Web of Science
Web of Science
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Edge loss of high-harmonic fast-wave heating power in NSTX: a cylindrical model
journal, September 2017
- Perkins, R. J.; Hosea, J. C.; Bertelli, N.
- Nuclear Fusion, Vol. 57, Issue 11
A Simple Mesh Generator in MATLAB
journal, January 2004
- Persson, Per-Olof; Strang, Gilbert
- SIAM Review, Vol. 46, Issue 2
Fast wave heating in the NSTX-Upgrade device
conference, January 2014
- Bertelli, N.; Jaeger, E. F.; Berry, L.
- RADIOFREQUENCY POWER IN PLASMAS: Proceedings of the 20th Topical Conference, AIP Conference Proceedings
Numerical simulation of ion cyclotron waves in tokamak plasmas
journal, January 1999
- Brambilla, M.
- Plasma Physics and Controlled Fusion, Vol. 41, Issue 1
Fast-wave power flow along SOL field lines in NSTX and the associated power deposition profile across the SOL in front of the antenna
journal, July 2013
- Perkins, R. J.; Ahn, J. -W.; Bell, R. E.
- Nuclear Fusion, Vol. 53, Issue 8
High-Harmonic Fast-Wave Power Flow along Magnetic Field Lines in the Scrape-Off Layer of NSTX
journal, July 2012
- Perkins, R. J.; Hosea, J. C.; Kramer, G. J.
- Physical Review Letters, Vol. 109, Issue 4
AORSA full wave calculations of helicon waves in DIII-D and ITER
journal, April 2018
- Lau, C.; Jaeger, E. F.; Bertelli, N.
- Nuclear Fusion, Vol. 58, Issue 6
Full‐wave modeling of EMIC waves near the He + gyrofrequency
journal, January 2016
- Kim, Eun‐Hwa; Johnson, Jay R.
- Geophysical Research Letters, Vol. 43, Issue 1
High harmonic fast wave heating efficiency enhancement and current drive at longer wavelength on the National Spherical Torus Experiment
journal, May 2008
- Hosea, J.; Bell, R. E.; LeBlanc, B. P.
- Physics of Plasmas, Vol. 15, Issue 5
An Algorithm for Reducing the Bandwidth and Profile of a Sparse Matrix
journal, April 1976
- Gibbs, Norman E.; Poole, Jr., William G.; Stockmeyer, Paul K.
- SIAM Journal on Numerical Analysis, Vol. 13, Issue 2
Predicting High Harmonic Ion Cyclotron Heating Efficiency in Tokamak Plasmas
journal, September 2011
- Green, D. L.; Berry, L. A.; Chen, G.
- Physical Review Letters, Vol. 107, Issue 14
Magnetospheric ULF wave coupling in the dipole model: The impulsive excitation
journal, January 1989
- Lee, Dong-Hun; Lysak, Robert L.
- Journal of Geophysical Research, Vol. 94, Issue A12
Spectral effects on fast wave core heating and current drive
journal, June 2009
- Phillips, C. K.; Bell, R. E.; Berry, L. A.
- Nuclear Fusion, Vol. 49, Issue 7
An overview of recent physics results from NSTX
journal, March 2015
- Kaye, S. M.; Abrams, T.; Ahn, J. -W.
- Nuclear Fusion, Vol. 55, Issue 10
Delaunay refinement algorithms for triangular mesh generation
journal, May 2002
- Shewchuk, Jonathan Richard
- Computational Geometry, Vol. 22, Issue 1-3
Full wave simulations of fast wave heating losses in the scrape-off layer of NSTX and NSTX-U
journal, May 2014
- Bertelli, N.; Jaeger, E. F.; Hosea, J. C.
- Nuclear Fusion, Vol. 54, Issue 8
Global modeling of ULF waves at Mercury: GLOBAL MODELING OF ULF WAVES AT MERCURY
journal, July 2015
- Kim, Eun-Hwa; Johnson, Jay R.; Valeo, Ernest
- Geophysical Research Letters, Vol. 42, Issue 13
Exploration of spherical torus physics in the NSTX device
journal, March 2000
- Ono, M.; Kaye, S. M.; Peng, Y. -K. M.
- Nuclear Fusion, Vol. 40, Issue 3Y
Advances in high-harmonic fast wave physics in the National Spherical Torus Experiment
journal, May 2010
- Taylor, G.; Bell, R. E.; Hosea, J. C.
- Physics of Plasmas, Vol. 17, Issue 5
Overview of NSTX Upgrade initial results and modelling highlights
journal, June 2017
- Menard, J. E.; Allain, J. P.; Battaglia, D. J.
- Nuclear Fusion, Vol. 57, Issue 10, Article No. 102006
2D full-wave simulation of waves in space and tokamak plasmas
journal, January 2017
- Kim, Eun-Hwa; Bertelli, Nicola; Johnson, Jay
- EPJ Web of Conferences, Vol. 157
RF-plasma interactions in the antenna near fields
journal, January 1990
- Colestock, P.; Greene, G. J.; Hosea, J. C.
- Fusion Engineering and Design, Vol. 12, Issue 1-2
The interaction between waves in the ion cyclotron range of frequencies and the plasma boundary
journal, November 1993
- Noterdaeme, J. -M; Oost, G. Van
- Plasma Physics and Controlled Fusion, Vol. 35, Issue 11
Sheared Poloidal Flow Driven by Mode Conversion in Tokamak Plasmas
journal, May 2003
- Jaeger, E. F.; Berry, L. A.; Myra, J. R.
- Physical Review Letters, Vol. 90, Issue 19
All-orders spectral calculation of radio-frequency heating in two-dimensional toroidal plasmas
journal, May 2001
- Jaeger, E. F.; Berry, L. A.; D’Azevedo, E.
- Physics of Plasmas, Vol. 8, Issue 5
Exploration of the equilibrium operating space for NSTX-Upgrade
journal, August 2012
- Gerhardt, S. P.; Andre, R.; Menard, J. E.
- Nuclear Fusion, Vol. 52, Issue 8
Development of slow and fast wave coupling and heating from the C-Stellarator to NSTX
journal, January 2017
- Hosea, Joel
- EPJ Web of Conferences, Vol. 157
Full wave simulations of fast wave efficiency and power losses in the scrape-off layer of tokamak plasmas in mid/high harmonic and minority heating regimes
journal, December 2015
- Bertelli, N.; Jaeger, E. F.; Hosea, J. C.
- Nuclear Fusion, Vol. 56, Issue 1