Electron heating via mode converted ion Bernstein waves in the Alcator C-Mod tokamak

P. T. Bonoli; P. O'shea; M. Brambilla; S. N. Golovato; A. E. Hubbard; M. Porkolab; Y. Takase; R. L. Boivin; F. Bombarda; C. Christensen; C. L. Fiore; D. Garnier; J. Goetz; R. Granetz; M. Greenwald; S. F. Horne; I. H. Hutchinson; J. Irby; D. Jablonski; B. Labombard; B. Lipschultz; E. Marmar; M. May; A. Mazurenko; G. Mccracken; R. Nachtrieb; A. Niemczewski; H. Ohkawa; D. A. Pappas; J. Reardon; J. Rice; C. Rost; J. Schachter; J. A. Snipes; P. Stek; K. Takase; J. Terry; Y. Wang; R. L. Watterson; B. Welch; S. M. Wolfe

doi:10.1063/1.872344

Electron heating via mode converted ion Bernstein waves in the Alcator C-Mod tokamak

P. T. Bonoli, P. O'shea, M. Brambilla, S. N. Golovato, A. E. Hubbard, M. Porkolab, Y. Takase, R. L. Boivin, F. Bombarda, C. Christensen, C. L. Fiore, D. Garnier, J. Goetz, R. Granetz, M. Greenwald, S. F. Horne, I. H. Hutchinson, J. Irby, D. Jablonski, B. LabombardB. Lipschultz, E. Marmar, M. May, A. Mazurenko, G. Mccracken, R. Nachtrieb, A. Niemczewski, H. Ohkawa, D. A. Pappas, J. Reardon, J. Rice, C. Rost, J. Schachter, J. A. Snipes, P. Stek, K. Takase, J. Terry, Y. Wang, R. L. Watterson, B. Welch, S. M. Wolfe

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21 Scopus citations

Abstract

Highly localized direct electron heating [full width at half-maximum [formula omitted]] via mode converted ion Bernstein waves has been observed in the Alcator C-Mod Tokamak [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)]. Electron heating at or near the plasma center [formula omitted] has been observed in [formula omitted] discharges at [formula omitted] and [formula omitted] [Here, the minority ion species is indicated parenthetically.] Off-axis heating [formula omitted] has also been observed in [formula omitted] plasmas at [formula omitted] The concentration of [formula omitted] in these experiments was in the range of [formula omitted] and the locations of the mode conversion layer and electron heating peak could be controlled by changing the [formula omitted] concentration or toroidal magnetic field [formula omitted] The electron heating profiles were deduced using a rf modulation technique. Detailed comparisons with one-dimensional and toroidal full-wave models in the ion cyclotron range of frequencies have been carried out. One-dimensional full-wave code predictions were found to be in qualitative agreement with the experimental results. Toroidal full-wave calculations indicated the importance of volumetric and wave focusing effects in the interpretation of the experimental results.

Original language	English (US)
Pages (from-to)	1774-1782
Number of pages	9
Journal	Physics of Plasmas
Volume	4
Issue number	5
DOIs	https://doi.org/10.1063/1.872344
State	Published - May 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

Keywords

ALCATOR DEVICE
COMPUTERIZED SIMULATION
HELIUM 3
HYDROGEN
ION WAVES
MODE CONVERSION
PLASMA HEATING
WAVE PROPAGATION

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10.1063/1.872344

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Bonoli, P. T., O'shea, P., Brambilla, M., Golovato, S. N., Hubbard, A. E., Porkolab, M., Takase, Y., Boivin, R. L., Bombarda, F., Christensen, C., Fiore, C. L., Garnier, D., Goetz, J., Granetz, R., Greenwald, M., Horne, S. F., Hutchinson, I. H., Irby, J., Jablonski, D., ... Wolfe, S. M. (1997). Electron heating via mode converted ion Bernstein waves in the Alcator C-Mod tokamak. Physics of Plasmas, 4(5), 1774-1782. https://doi.org/10.1063/1.872344

@article{9208eb19cf884e919fb7e6219ceabc7c,

title = "Electron heating via mode converted ion Bernstein waves in the Alcator C-Mod tokamak",

abstract = "Highly localized direct electron heating [full width at half-maximum [formula omitted]] via mode converted ion Bernstein waves has been observed in the Alcator C-Mod Tokamak [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)]. Electron heating at or near the plasma center [formula omitted] has been observed in [formula omitted] discharges at [formula omitted] and [formula omitted] [Here, the minority ion species is indicated parenthetically.] Off-axis heating [formula omitted] has also been observed in [formula omitted] plasmas at [formula omitted] The concentration of [formula omitted] in these experiments was in the range of [formula omitted] and the locations of the mode conversion layer and electron heating peak could be controlled by changing the [formula omitted] concentration or toroidal magnetic field [formula omitted] The electron heating profiles were deduced using a rf modulation technique. Detailed comparisons with one-dimensional and toroidal full-wave models in the ion cyclotron range of frequencies have been carried out. One-dimensional full-wave code predictions were found to be in qualitative agreement with the experimental results. Toroidal full-wave calculations indicated the importance of volumetric and wave focusing effects in the interpretation of the experimental results.",

keywords = "ALCATOR DEVICE, COMPUTERIZED SIMULATION, HELIUM 3, HYDROGEN, ION WAVES, MODE CONVERSION, PLASMA HEATING, WAVE PROPAGATION",

author = "Bonoli, \{P. T.\} and P. O'shea and M. Brambilla and Golovato, \{S. N.\} and Hubbard, \{A. E.\} and M. Porkolab and Y. Takase and Boivin, \{R. L.\} and F. Bombarda and C. Christensen and Fiore, \{C. L.\} and D. Garnier and J. Goetz and R. Granetz and M. Greenwald and Horne, \{S. F.\} and Hutchinson, \{I. H.\} and J. Irby and D. Jablonski and B. Labombard and B. Lipschultz and E. Marmar and M. May and A. Mazurenko and G. Mccracken and R. Nachtrieb and A. Niemczewski and H. Ohkawa and Pappas, \{D. A.\} and J. Reardon and J. Rice and C. Rost and J. Schachter and Snipes, \{J. A.\} and P. Stek and K. Takase and J. Terry and Y. Wang and Watterson, \{R. L.\} and B. Welch and Wolfe, \{S. M.\}",

year = "1997",

month = may,

doi = "10.1063/1.872344",

language = "English (US)",

volume = "4",

pages = "1774--1782",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics",

number = "5",

}

Bonoli, PT, O'shea, P, Brambilla, M, Golovato, SN, Hubbard, AE, Porkolab, M, Takase, Y, Boivin, RL, Bombarda, F, Christensen, C, Fiore, CL, Garnier, D, Goetz, J, Granetz, R, Greenwald, M, Horne, SF, Hutchinson, IH, Irby, J, Jablonski, D, Labombard, B, Lipschultz, B, Marmar, E, May, M, Mazurenko, A, Mccracken, G, Nachtrieb, R, Niemczewski, A, Ohkawa, H, Pappas, DA, Reardon, J, Rice, J, Rost, C, Schachter, J, Snipes, JA, Stek, P, Takase, K, Terry, J, Wang, Y, Watterson, RL, Welch, B & Wolfe, SM 1997, 'Electron heating via mode converted ion Bernstein waves in the Alcator C-Mod tokamak', Physics of Plasmas, vol. 4, no. 5, pp. 1774-1782. https://doi.org/10.1063/1.872344

TY - JOUR

T1 - Electron heating via mode converted ion Bernstein waves in the Alcator C-Mod tokamak

AU - Bonoli, P. T.

AU - O'shea, P.

AU - Brambilla, M.

AU - Golovato, S. N.

AU - Hubbard, A. E.

AU - Porkolab, M.

AU - Takase, Y.

AU - Boivin, R. L.

AU - Bombarda, F.

AU - Christensen, C.

AU - Fiore, C. L.

AU - Garnier, D.

AU - Goetz, J.

AU - Granetz, R.

AU - Greenwald, M.

AU - Horne, S. F.

AU - Hutchinson, I. H.

AU - Irby, J.

AU - Jablonski, D.

AU - Labombard, B.

AU - Lipschultz, B.

AU - Marmar, E.

AU - May, M.

AU - Mazurenko, A.

AU - Mccracken, G.

AU - Nachtrieb, R.

AU - Niemczewski, A.

AU - Ohkawa, H.

AU - Pappas, D. A.

AU - Reardon, J.

AU - Rice, J.

AU - Rost, C.

AU - Schachter, J.

AU - Snipes, J. A.

AU - Stek, P.

AU - Takase, K.

AU - Terry, J.

AU - Wang, Y.

AU - Watterson, R. L.

AU - Welch, B.

AU - Wolfe, S. M.

PY - 1997/5

Y1 - 1997/5

N2 - Highly localized direct electron heating [full width at half-maximum [formula omitted]] via mode converted ion Bernstein waves has been observed in the Alcator C-Mod Tokamak [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)]. Electron heating at or near the plasma center [formula omitted] has been observed in [formula omitted] discharges at [formula omitted] and [formula omitted] [Here, the minority ion species is indicated parenthetically.] Off-axis heating [formula omitted] has also been observed in [formula omitted] plasmas at [formula omitted] The concentration of [formula omitted] in these experiments was in the range of [formula omitted] and the locations of the mode conversion layer and electron heating peak could be controlled by changing the [formula omitted] concentration or toroidal magnetic field [formula omitted] The electron heating profiles were deduced using a rf modulation technique. Detailed comparisons with one-dimensional and toroidal full-wave models in the ion cyclotron range of frequencies have been carried out. One-dimensional full-wave code predictions were found to be in qualitative agreement with the experimental results. Toroidal full-wave calculations indicated the importance of volumetric and wave focusing effects in the interpretation of the experimental results.

AB - Highly localized direct electron heating [full width at half-maximum [formula omitted]] via mode converted ion Bernstein waves has been observed in the Alcator C-Mod Tokamak [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)]. Electron heating at or near the plasma center [formula omitted] has been observed in [formula omitted] discharges at [formula omitted] and [formula omitted] [Here, the minority ion species is indicated parenthetically.] Off-axis heating [formula omitted] has also been observed in [formula omitted] plasmas at [formula omitted] The concentration of [formula omitted] in these experiments was in the range of [formula omitted] and the locations of the mode conversion layer and electron heating peak could be controlled by changing the [formula omitted] concentration or toroidal magnetic field [formula omitted] The electron heating profiles were deduced using a rf modulation technique. Detailed comparisons with one-dimensional and toroidal full-wave models in the ion cyclotron range of frequencies have been carried out. One-dimensional full-wave code predictions were found to be in qualitative agreement with the experimental results. Toroidal full-wave calculations indicated the importance of volumetric and wave focusing effects in the interpretation of the experimental results.

KW - ALCATOR DEVICE

KW - COMPUTERIZED SIMULATION

KW - HELIUM 3

KW - HYDROGEN

KW - ION WAVES

KW - MODE CONVERSION

KW - PLASMA HEATING

KW - WAVE PROPAGATION

UR - https://www.scopus.com/pages/publications/84863200231

UR - https://www.scopus.com/inward/citedby.url?scp=84863200231&partnerID=8YFLogxK

U2 - 10.1063/1.872344

DO - 10.1063/1.872344

M3 - Article

AN - SCOPUS:84863200231

SN - 1070-664X

VL - 4

SP - 1774

EP - 1782

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 5

ER -

Electron heating via mode converted ion Bernstein waves in the Alcator C-Mod tokamak

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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