Electron pressure balance in the SOL through the transition to detachment

被引：61

作者：

McLean, A. G. ^{[1
]}

Leonard, A. W. ^{[2
]}

Makowski, M. A. ^{[2
]}

Groth, M. ^{[3
]}

Allen, S. L. ^{[1
]}

Boedo, J. A. ^{[4
]}

Bray, B. D. ^{[2
]}

Briesemeister, A. R. ^{[5
]}

Carlstrom, T. N. ^{[1
]}

Eldon, D. ^{[4
]}

Fenstermacher, M. E. ^{[1
]}

Hill, D. N. ^{[1
]}

Lasnier, C. J. ^{[1
]}

Liu, C. ^{[2
]}

Osborne, T. H. ^{[2
]}

Petrie, T. W. ^{[2
]}

Soukhanovskii, V. A. ^{[1
]}

Stangeby, P. C. ^{[6
]}

Tsui, C. ^{[6
]}

Unterberg, E. A. ^{[5
]}

Watkins, J. G. ^{[7
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Gen Atom, San Diego, CA 92186 USA

[3] Aalto Univ, Espoo 02150, Finland

[4] Univ Calif San Diego, La Jolla, CA 92093 USA

[5] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[6] Univ Toronto, Inst Aerosp Studies, Toronto, ON M3H 5T6, Canada

[7] Sandia Natl Labs, Albuquerque, NM 87185 USA

来源：

JOURNAL OF NUCLEAR MATERIALS | 2015年 / 463卷

关键词：

DIII-D;

D O I：

10.1016/j.jnucmat.2015.01.066

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Upgrades to core and divertor Thomson scattering (DTS) diagnostics at DIII-D have provided measurements of electron pressure profiles in the lower divertor from attached- to fully-detached divertor plasma conditions. Detailed, multistep sequences of discharges with increasing line-averaged density were run at several levels of P-inj. Strike point sweeping allowed 2D divertor characterization using DTS optimized to measure T-e down to 0.5 eV. The ionization front at the onset of detachment is found to move upwards in a controlled manner consistent with the indication that scrape-off layer parallel power flux is converted from conducted to convective heat transport. Measurements of n(e), T-e and p(e) in the divertor versus L-parallel demonstrate a rapid transition from T-e >= 15 eV to <= 3 eV occurring both at the outer strike point and upstream of the X-point. These observations provide a strong benchmark for ongoing modeling of divertor detachment for existing and future tokamak devices. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：533 / 536

页数：4

共 10 条

[1] Initial operation of the divertor Thomson scattering diagnostic on DIII-D [J].

Carlstrom, TN ;

Hsieh, CL ;

Stockdale, R ;

Nilson, DG ;

Hill, DN .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1997, 68 (02) :1195-1200

[2] The Filterscope [J].

Colchin, RJ ;

Hillis, DL ;

Maingi, R ;

Klepper, CC ;

Brooks, NH .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2003, 74 (03) :2068-2070

[3] Initial results of the high resolution edge Thomson scattering upgrade at DIII-D [J].

Eldon, D. ;

Bray, B. D. ;

Deterly, T. M. ;

Liu, C. ;

Watkins, M. ;

Groebner, R. J. ;

Leonard, A. W. ;

Osborne, T. H. ;

Snyder, P. B. ;

Boivin, R. L. ;

Tynan, G. R. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2012, 83 (10)

[4]

Groth M., 2011, 38 EPS STRASB FRANC

[5] Scaling radiative divertor solutions to high power in DIII-D [J].

Leonard, A. W. ;

Mahdavi, M. A. ;

Lasnier, C. J. ;

Petrie, T. W. ;

Stangeby, P. C. .

NUCLEAR FUSION, 2012, 52 (06)

[6] Distributed divertor radiation through convection in DIII-D [J].

Leonard, AW ;

Mahdavi, MA ;

Allen, SL ;

Brooks, NH ;

Fenstermacher, ME ;

Hill, DN ;

Lasnier, CJ ;

Maingi, R ;

Porter, GD ;

Petrie, TW ;

Watkins, JG ;

West, WP .

PHYSICAL REVIEW LETTERS, 1997, 78 (25) :4769-4772

[7] Plasma detachment in JET Mark I divertor experiments [J].

Loarte, A ;

Monk, RD ;

Martin-Solis, JR ;

Campbell, DJ ;

Chankin, AV ;

Clement, S ;

Davies, SJ ;

Ehrenberg, J ;

Erents, SK ;

Guo, HY ;

Harbour, PJ ;

Horton, LD ;

Ingesson, LC ;

Jackel, H ;

Lingertat, J ;

Lowry, CG ;

Maggi, CF ;

Matthews, GF ;

McCormick, K ;

O'Brien, DP ;

Reichle, R ;

Saibene, G ;

Smith, RJ ;

Stamp, MF ;

Stork, D ;

Vlases, GC .

NUCLEAR FUSION, 1998, 38 (03) :331-371

[8] Investigation of electron parallel pressure balance in the scrapeoff layer of deuterium-based radiative divertor discharges in DIII-D [J].

Petrie, TW ;

Allen, SL ;

Carlstrom, TN ;

Hill, DN ;

Maingi, R ;

Nilson, D ;

Brown, M ;

Buchenauer, DA ;

Evans, TE ;

Fenstermacher, ME ;

Jong, RA ;

Lasnier, CJ ;

Leonard, AW ;

Mahdavi, MA ;

Porter, GD ;

Wade, MR ;

West, WP .

JOURNAL OF NUCLEAR MATERIALS, 1997, 241 :639-644

[9] Plasma pressure and flows during divertor detachment [J].

Schaffer, MJ ;

Boedo, JA ;

Moyer, RA .

JOURNAL OF NUCLEAR MATERIALS, 1999, 266 :264-271

[10] Current understanding of divertor detachment: Experiments and modelling [J].

Wischmeier, M. ;

Groth, M. ;

Kallenbach, A. ;

Chankin, A. V. ;

Coster, D. P. ;

Dux, R. ;

Herrmann, A. ;

Mueller, H. W. ;

Pugno, R. ;

Reiter, D. ;

Scarabosio, A. ;

Watkins, J. G. .

JOURNAL OF NUCLEAR MATERIALS, 2009, 390-91 :250-254

← 1 →