A 1D coupled transport / cold plasma wave model for parallel ponderomotive density modification near RF actuators

R. L. Barnett; D. L. Green; J. D. Lore; D. N. Smithe; J. R. Myra; C. L. Waters

doi:10.1063/5.0019561

A 1D coupled transport / cold plasma wave model for parallel ponderomotive density modification near RF actuators

R. L. Barnett, D. L. Green, J. D. Lore, D. N. Smithe, J. R. Myra, C. L. Waters

Power Exhaust and Particle Control

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

The plasma density profile close to RF actuators plays a vital role in the efficiency of power coupling from the antenna to the core plasma of fusion devices. Nonlinear interactions can be significant when considering the interaction of applied RF power and the tenuous SOL plasma, and the inclusion of this region in computational analysis is essential to providing robust predictive simulations of plasma response to RF application. Of particular interest is the observed density modification during RF operation. Here we present a self consistent description of the nonlinear ponderomotive force in the antenna near field region, via coupling a 1D field aligned transport model with a 1D cold plasma wave model. Results are presented, which show a parallel electric field of 300 Vm-¹ drove a density reduction of ∼ 20% over 25 RF periods.

Original language	English
Title of host publication	23rd Topical Conference on Radiofrequency Power in Plasmas
Editors	Paul T. Bonoli, Robert I. Pinsker, Xiaojie Wang
Publisher	American Institute of Physics Inc.
ISBN (Electronic)	9780735420137
DOIs	https://doi.org/10.1063/5.0019561
State	Published - Sep 16 2020
Event	23rd Topical Conference on Radiofrequency Power in Plasmas - Hefei, China Duration: May 14 2019 → May 17 2019

Publication series

Name	AIP Conference Proceedings
Volume	2254
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	23rd Topical Conference on Radiofrequency Power in Plasmas
Country/Territory	China
City	Hefei
Period	05/14/19 → 05/17/19

Funding

This work was supported by the U.S. Department of Energy Scientific Discovery through Advanced Computing Initiative, Contract Number DE-AC05-00OR22725, and an Australian Government Research Training Program (RTP) Scholarship.

Access to Document

10.1063/5.0019561

Cite this

Barnett, R. L., Green, D. L., Lore, J. D., Smithe, D. N., Myra, J. R., & Waters, C. L. (2020). A 1D coupled transport / cold plasma wave model for parallel ponderomotive density modification near RF actuators. In P. T. Bonoli, R. I. Pinsker, & X. Wang (Eds.), 23rd Topical Conference on Radiofrequency Power in Plasmas Article 50001 (AIP Conference Proceedings; Vol. 2254). American Institute of Physics Inc.. https://doi.org/10.1063/5.0019561

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title = "A 1D coupled transport / cold plasma wave model for parallel ponderomotive density modification near RF actuators",

abstract = "The plasma density profile close to RF actuators plays a vital role in the efficiency of power coupling from the antenna to the core plasma of fusion devices. Nonlinear interactions can be significant when considering the interaction of applied RF power and the tenuous SOL plasma, and the inclusion of this region in computational analysis is essential to providing robust predictive simulations of plasma response to RF application. Of particular interest is the observed density modification during RF operation. Here we present a self consistent description of the nonlinear ponderomotive force in the antenna near field region, via coupling a 1D field aligned transport model with a 1D cold plasma wave model. Results are presented, which show a parallel electric field of 300 Vm-1 drove a density reduction of ∼ 20% over 25 RF periods.",

author = "Barnett, {R. L.} and Green, {D. L.} and Lore, {J. D.} and Smithe, {D. N.} and Myra, {J. R.} and Waters, {C. L.}",

note = "Publisher Copyright: {\textcopyright} 2020 American Institute of Physics Inc.. All rights reserved.; 23rd Topical Conference on Radiofrequency Power in Plasmas ; Conference date: 14-05-2019 Through 17-05-2019",

year = "2020",

month = sep,

day = "16",

doi = "10.1063/5.0019561",

language = "English",

series = "AIP Conference Proceedings",

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}

Barnett, RL, Green, DL, Lore, JD, Smithe, DN, Myra, JR & Waters, CL 2020, A 1D coupled transport / cold plasma wave model for parallel ponderomotive density modification near RF actuators. in PT Bonoli, RI Pinsker & X Wang (eds), 23rd Topical Conference on Radiofrequency Power in Plasmas., 50001, AIP Conference Proceedings, vol. 2254, American Institute of Physics Inc., 23rd Topical Conference on Radiofrequency Power in Plasmas, Hefei, China, 05/14/19. https://doi.org/10.1063/5.0019561

A 1D coupled transport / cold plasma wave model for parallel ponderomotive density modification near RF actuators. / Barnett, R. L.; Green, D. L.; Lore, J. D. et al.
23rd Topical Conference on Radiofrequency Power in Plasmas. ed. / Paul T. Bonoli; Robert I. Pinsker; Xiaojie Wang. American Institute of Physics Inc., 2020. 50001 (AIP Conference Proceedings; Vol. 2254).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - The plasma density profile close to RF actuators plays a vital role in the efficiency of power coupling from the antenna to the core plasma of fusion devices. Nonlinear interactions can be significant when considering the interaction of applied RF power and the tenuous SOL plasma, and the inclusion of this region in computational analysis is essential to providing robust predictive simulations of plasma response to RF application. Of particular interest is the observed density modification during RF operation. Here we present a self consistent description of the nonlinear ponderomotive force in the antenna near field region, via coupling a 1D field aligned transport model with a 1D cold plasma wave model. Results are presented, which show a parallel electric field of 300 Vm-1 drove a density reduction of ∼ 20% over 25 RF periods.

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Barnett RL, Green DL, Lore JD, Smithe DN, Myra JR, Waters CL. A 1D coupled transport / cold plasma wave model for parallel ponderomotive density modification near RF actuators. In Bonoli PT, Pinsker RI, Wang X, editors, 23rd Topical Conference on Radiofrequency Power in Plasmas. American Institute of Physics Inc. 2020. 50001. (AIP Conference Proceedings). doi: 10.1063/5.0019561

A 1D coupled transport / cold plasma wave model for parallel ponderomotive density modification near RF actuators

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