Experimental investigation of transport phenomena in the scrape-off layer and divertor

B. LaBombard; J. A. Goetz; I. Hutchinson; D. Jablonski; J. Kesner; C. Kurz; B. Lipschultz; G. M. McCracken; A. Niemczewski; J. Terry; A. Allen; R. L. Boivin; F. Bombarda; P. Bonoli; C. Christensen; C. Fiore; D. Garnier; S. Golovato; R. Granetz; M. Greenwald; S. Horne; A. Hubbard; J. Irby; D. Lo; D. Lumma; E. Marmar; M. May; A. Mazurenko; R. Nachtrieb; H. Ohkawa; P. O'Shea; M. Porkolab; J. Reardon; J. Rice; J. Rost; J. Schachter; J. Snipes; J. Sorci; P. Stek; Y. Takase; Y. Wang; R. Watterson; J. Weaver; B. Welch; S. Wolfe

doi:10.1016/s0022-3115(97)80037-2

Experimental investigation of transport phenomena in the scrape-off layer and divertor

B. LaBombard
, J. A. Goetz
, I. Hutchinson
, D. Jablonski
, J. Kesner
, C. Kurz
, B. Lipschultz
, G. M. McCracken
, A. Niemczewski
, J. Terry
, A. Allen
, R. L. Boivin
, F. Bombarda
, P. Bonoli
, C. Christensen
, C. Fiore
, D. Garnier
, S. Golovato
, R. Granetz
, M. Greenwald

S. Horne, A. Hubbard, J. Irby, D. Lo, D. Lumma, E. Marmar, M. May, A. Mazurenko, R. Nachtrieb, H. Ohkawa, P. O'Shea, M. Porkolab, J. Reardon, J. Rice, J. Rost, J. Schachter, J. Snipes, J. Sorci, P. Stek, Y. Takase, Y. Wang, R. Watterson, J. Weaver, B. Welch, S. Wolfe

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Transport physics in the divertor and scrape-off layer of Alcator C-Mod is investigated for a wide range of plasma conditions. Parallel (∥) transport topics include: low recycling, high-recycling, and detached regimes, thermoelectric currents, asymmetric heat fluxes driven by thermoelectric currents, and reversed divertor flows. Perpendicular (⊥) transport topics include: expected and measured scalings of ⊥ gradients with local conditions, estimated χ_⊥ profiles and scalings, divertor neutral retention effects, and L-mode/H-mode effects. Key results are: (i) classical ∥ transport is obeyed with ion-neutral momentum coupling effects, (ii) ⊥ heat transport is proportional to local gradients, (iii) χ_⊥ α T^-0.6_c n^-0.6 L ^0.7 in L-mode, insensitive to toroidal field, (iv) χ_⊥ is dependent on divertor neutral retention, (v) H-mode transport barrier effects partially extend inside the SOL, (vi) inside/outside divertor asymmetries may be caused by a thermoelectric instability, and (vii) reversed ∥ flows depend on divertor asymmetries and their implicit ionization source imbalances.

Original language	English (US)
Pages (from-to)	149-166
Number of pages	18
Journal	Journal of Nuclear Materials
Volume	241-243
DOIs	https://doi.org/10.1016/s0022-3115(97)80037-2
State	Published - Feb 11 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
General Materials Science
Nuclear Energy and Engineering

Keywords

Alcator C-Mod
Scaling law
SOL plasma
Transverse transport

Access to Document

10.1016/s0022-3115(97)80037-2

Cite this

LaBombard, B., Goetz, J. A., Hutchinson, I., Jablonski, D., Kesner, J., Kurz, C., Lipschultz, B., McCracken, G. M., Niemczewski, A., Terry, J., Allen, A., Boivin, R. L., Bombarda, F., Bonoli, P., Christensen, C., Fiore, C., Garnier, D., Golovato, S., Granetz, R., ... Wolfe, S. (1997). Experimental investigation of transport phenomena in the scrape-off layer and divertor. Journal of Nuclear Materials, 241-243, 149-166. https://doi.org/10.1016/s0022-3115(97)80037-2

@article{3ededb8c0b924e8db3e8a30534a5bd71,

title = "Experimental investigation of transport phenomena in the scrape-off layer and divertor",

abstract = "Transport physics in the divertor and scrape-off layer of Alcator C-Mod is investigated for a wide range of plasma conditions. Parallel (∥) transport topics include: low recycling, high-recycling, and detached regimes, thermoelectric currents, asymmetric heat fluxes driven by thermoelectric currents, and reversed divertor flows. Perpendicular (⊥) transport topics include: expected and measured scalings of ⊥ gradients with local conditions, estimated χ⊥ profiles and scalings, divertor neutral retention effects, and L-mode/H-mode effects. Key results are: (i) classical ∥ transport is obeyed with ion-neutral momentum coupling effects, (ii) ⊥ heat transport is proportional to local gradients, (iii) χ⊥ α T-0.6c n-0.6 L 0.7 in L-mode, insensitive to toroidal field, (iv) χ⊥ is dependent on divertor neutral retention, (v) H-mode transport barrier effects partially extend inside the SOL, (vi) inside/outside divertor asymmetries may be caused by a thermoelectric instability, and (vii) reversed ∥ flows depend on divertor asymmetries and their implicit ionization source imbalances.",

keywords = "Alcator C-Mod, Scaling law, SOL plasma, Transverse transport",

author = "B. LaBombard and Goetz, \{J. A.\} and I. Hutchinson and D. Jablonski and J. Kesner and C. Kurz and B. Lipschultz and McCracken, \{G. M.\} and A. Niemczewski and J. Terry and A. Allen and Boivin, \{R. L.\} and F. Bombarda and P. Bonoli and C. Christensen and C. Fiore and D. Garnier and S. Golovato and R. Granetz and M. Greenwald and S. Horne and A. Hubbard and J. Irby and D. Lo and D. Lumma and E. Marmar and M. May and A. Mazurenko and R. Nachtrieb and H. Ohkawa and P. O'Shea and M. Porkolab and J. Reardon and J. Rice and J. Rost and J. Schachter and J. Snipes and J. Sorci and P. Stek and Y. Takase and Y. Wang and R. Watterson and J. Weaver and B. Welch and S. Wolfe",

year = "1997",

month = feb,

day = "11",

doi = "10.1016/s0022-3115(97)80037-2",

language = "English (US)",

volume = "241-243",

pages = "149--166",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

}

LaBombard, B, Goetz, JA, Hutchinson, I, Jablonski, D, Kesner, J, Kurz, C, Lipschultz, B, McCracken, GM, Niemczewski, A, Terry, J, Allen, A, Boivin, RL, Bombarda, F, Bonoli, P, Christensen, C, Fiore, C, Garnier, D, Golovato, S, Granetz, R, Greenwald, M, Horne, S, Hubbard, A, Irby, J, Lo, D, Lumma, D, Marmar, E, May, M, Mazurenko, A, Nachtrieb, R, Ohkawa, H, O'Shea, P, Porkolab, M, Reardon, J, Rice, J, Rost, J, Schachter, J, Snipes, J, Sorci, J, Stek, P, Takase, Y, Wang, Y, Watterson, R, Weaver, J, Welch, B & Wolfe, S 1997, 'Experimental investigation of transport phenomena in the scrape-off layer and divertor', Journal of Nuclear Materials, vol. 241-243, pp. 149-166. https://doi.org/10.1016/s0022-3115(97)80037-2

TY - JOUR

T1 - Experimental investigation of transport phenomena in the scrape-off layer and divertor

AU - LaBombard, B.

AU - Goetz, J. A.

AU - Hutchinson, I.

AU - Jablonski, D.

AU - Kesner, J.

AU - Kurz, C.

AU - Lipschultz, B.

AU - McCracken, G. M.

AU - Niemczewski, A.

AU - Terry, J.

AU - Allen, A.

AU - Boivin, R. L.

AU - Bombarda, F.

AU - Bonoli, P.

AU - Christensen, C.

AU - Fiore, C.

AU - Garnier, D.

AU - Golovato, S.

AU - Granetz, R.

AU - Greenwald, M.

AU - Horne, S.

AU - Hubbard, A.

AU - Irby, J.

AU - Lo, D.

AU - Lumma, D.

AU - Marmar, E.

AU - May, M.

AU - Mazurenko, A.

AU - Nachtrieb, R.

AU - Ohkawa, H.

AU - O'Shea, P.

AU - Porkolab, M.

AU - Reardon, J.

AU - Rice, J.

AU - Rost, J.

AU - Schachter, J.

AU - Snipes, J.

AU - Sorci, J.

AU - Stek, P.

AU - Takase, Y.

AU - Wang, Y.

AU - Watterson, R.

AU - Weaver, J.

AU - Welch, B.

AU - Wolfe, S.

PY - 1997/2/11

Y1 - 1997/2/11

N2 - Transport physics in the divertor and scrape-off layer of Alcator C-Mod is investigated for a wide range of plasma conditions. Parallel (∥) transport topics include: low recycling, high-recycling, and detached regimes, thermoelectric currents, asymmetric heat fluxes driven by thermoelectric currents, and reversed divertor flows. Perpendicular (⊥) transport topics include: expected and measured scalings of ⊥ gradients with local conditions, estimated χ⊥ profiles and scalings, divertor neutral retention effects, and L-mode/H-mode effects. Key results are: (i) classical ∥ transport is obeyed with ion-neutral momentum coupling effects, (ii) ⊥ heat transport is proportional to local gradients, (iii) χ⊥ α T-0.6c n-0.6 L 0.7 in L-mode, insensitive to toroidal field, (iv) χ⊥ is dependent on divertor neutral retention, (v) H-mode transport barrier effects partially extend inside the SOL, (vi) inside/outside divertor asymmetries may be caused by a thermoelectric instability, and (vii) reversed ∥ flows depend on divertor asymmetries and their implicit ionization source imbalances.

AB - Transport physics in the divertor and scrape-off layer of Alcator C-Mod is investigated for a wide range of plasma conditions. Parallel (∥) transport topics include: low recycling, high-recycling, and detached regimes, thermoelectric currents, asymmetric heat fluxes driven by thermoelectric currents, and reversed divertor flows. Perpendicular (⊥) transport topics include: expected and measured scalings of ⊥ gradients with local conditions, estimated χ⊥ profiles and scalings, divertor neutral retention effects, and L-mode/H-mode effects. Key results are: (i) classical ∥ transport is obeyed with ion-neutral momentum coupling effects, (ii) ⊥ heat transport is proportional to local gradients, (iii) χ⊥ α T-0.6c n-0.6 L 0.7 in L-mode, insensitive to toroidal field, (iv) χ⊥ is dependent on divertor neutral retention, (v) H-mode transport barrier effects partially extend inside the SOL, (vi) inside/outside divertor asymmetries may be caused by a thermoelectric instability, and (vii) reversed ∥ flows depend on divertor asymmetries and their implicit ionization source imbalances.

KW - Alcator C-Mod

KW - Scaling law

KW - SOL plasma

KW - Transverse transport

UR - https://www.scopus.com/pages/publications/85049824571

UR - https://www.scopus.com/pages/publications/85049824571#tab=citedBy

U2 - 10.1016/s0022-3115(97)80037-2

DO - 10.1016/s0022-3115(97)80037-2

M3 - Article

AN - SCOPUS:85049824571

SN - 0022-3115

VL - 241-243

SP - 149

EP - 166

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Experimental investigation of transport phenomena in the scrape-off layer and divertor

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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