On the secular density rises in NBI-heated H-mode plasmas in NSTX

V. A. Soukhanovskii; R. E. Bell; C. Bush; R. Kaita; H. W. Kugel; B. P. LeBlanc; R. Maingi; R. Raman; A. L. Roquemore

doi:10.1016/j.jnucmat.2009.01.067

On the secular density rises in NBI-heated H-mode plasmas in NSTX

V. A. Soukhanovskii
, R. E. Bell
, C. Bush
, R. Kaita
, H. W. Kugel
, B. P. LeBlanc
, R. Maingi
, R. Raman
, A. L. Roquemore

PPPL NSTX

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

11 Scopus citations

Abstract

Plasma-wall interaction analysis is developed at the National Spherical Torus Experiment. At present, poloidally separated recycling and neutral pressure measurements are used to characterize recycling flux trends. The causes of monotonic density increases observed in initial phases of H-mode discharges at t ≤ 0.2 s(-) 0.6 s appear to be the monotonically increasing source in the divertor, and particle containment time τ_p^* long in comparison with discharge duration. The ratio of the wall flux to divertor flux is low throughout the density increase phase except in the initial segment, when dN_e / dt is highest and magnitudes of the wall and divertor fluxes are similar.

Original language	English (US)
Pages (from-to)	516-519
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	390-391
Issue number	1
DOIs	https://doi.org/10.1016/j.jnucmat.2009.01.067
State	Published - Jun 15 2009

All Science Journal Classification (ASJC) codes

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

Access to Document

10.1016/j.jnucmat.2009.01.067

Cite this

@article{83433817923049f7b9051dd41ca95f3b,

title = "On the secular density rises in NBI-heated H-mode plasmas in NSTX",

abstract = "Plasma-wall interaction analysis is developed at the National Spherical Torus Experiment. At present, poloidally separated recycling and neutral pressure measurements are used to characterize recycling flux trends. The causes of monotonic density increases observed in initial phases of H-mode discharges at t ≤ 0.2 s(-) 0.6 s appear to be the monotonically increasing source in the divertor, and particle containment time τp* long in comparison with discharge duration. The ratio of the wall flux to divertor flux is low throughout the density increase phase except in the initial segment, when dNe / dt is highest and magnitudes of the wall and divertor fluxes are similar.",

author = "Soukhanovskii, \{V. A.\} and Bell, \{R. E.\} and C. Bush and R. Kaita and Kugel, \{H. W.\} and LeBlanc, \{B. P.\} and R. Maingi and R. Raman and Roquemore, \{A. L.\}",

year = "2009",

month = jun,

day = "15",

doi = "10.1016/j.jnucmat.2009.01.067",

language = "English (US)",

volume = "390-391",

pages = "516--519",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

number = "1",

}

TY - JOUR

T1 - On the secular density rises in NBI-heated H-mode plasmas in NSTX

AU - Soukhanovskii, V. A.

AU - Bell, R. E.

AU - Bush, C.

AU - Kaita, R.

AU - Kugel, H. W.

AU - LeBlanc, B. P.

AU - Maingi, R.

AU - Raman, R.

AU - Roquemore, A. L.

PY - 2009/6/15

Y1 - 2009/6/15

N2 - Plasma-wall interaction analysis is developed at the National Spherical Torus Experiment. At present, poloidally separated recycling and neutral pressure measurements are used to characterize recycling flux trends. The causes of monotonic density increases observed in initial phases of H-mode discharges at t ≤ 0.2 s(-) 0.6 s appear to be the monotonically increasing source in the divertor, and particle containment time τp* long in comparison with discharge duration. The ratio of the wall flux to divertor flux is low throughout the density increase phase except in the initial segment, when dNe / dt is highest and magnitudes of the wall and divertor fluxes are similar.

AB - Plasma-wall interaction analysis is developed at the National Spherical Torus Experiment. At present, poloidally separated recycling and neutral pressure measurements are used to characterize recycling flux trends. The causes of monotonic density increases observed in initial phases of H-mode discharges at t ≤ 0.2 s(-) 0.6 s appear to be the monotonically increasing source in the divertor, and particle containment time τp* long in comparison with discharge duration. The ratio of the wall flux to divertor flux is low throughout the density increase phase except in the initial segment, when dNe / dt is highest and magnitudes of the wall and divertor fluxes are similar.

UR - https://www.scopus.com/pages/publications/67349155011

UR - https://www.scopus.com/pages/publications/67349155011#tab=citedBy

U2 - 10.1016/j.jnucmat.2009.01.067

DO - 10.1016/j.jnucmat.2009.01.067

M3 - Article

AN - SCOPUS:67349155011

SN - 0022-3115

VL - 390-391

SP - 516

EP - 519

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1

ER -

On the secular density rises in NBI-heated H-mode plasmas in NSTX

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this