Ohmic H-mode power thresholds and recycling on COMPASS-D

S. J. Fielding; J. D. Ashall; K. B. Axon; R. A. Bamford; M. Booth; P. G. Carolan; T. Edlington; A. M. Edwards; J. Ferreira; D. Gates; S. Gerasimov; J. Hugill; B. Lloyd; S. J. Manhood; A. W. Morris; R. O'Connell; D. C. Robinson; P. R. Simpson; K. Stammers; J. Tomas; T. N. Todd; M. Valovic̆

doi:10.1016/0022-3115(94)00429-3

Ohmic H-mode power thresholds and recycling on COMPASS-D

S. J. Fielding, J. D. Ashall, K. B. Axon, R. A. Bamford, M. Booth, P. G. Carolan, T. Edlington, A. M. Edwards, J. Ferreira, D. Gates, S. Gerasimov, J. Hugill, B. Lloyd, S. J. Manhood, A. W. Morris, R. O'Connell, D. C. Robinson, P. R. Simpson, K. Stammers, J. TomasT. N. Todd, M. Valovic̆

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

4 Scopus citations

Abstract

Single null X-point discharges on COMPASS-D show a gradual L to H transition. Frequent boronization gives long ELM-free H-mode periods, duration 〉 100 ms, with continuously rising density to 〉 1.5 × 10¹⁰ m⁻³. The LH transition threshold behaviour is more complex than that predicted by present simple scaling laws, with a well-defined low-density limit being observed and sensitivity to small perturbations at the plasma boundary. Density and recycling behaviour is analysed. In discharges refuelled by recycling alone, the coefficient of recycling as well as the particle confinement time is higher in H-mode periods.

Original language	English (US)
Pages (from-to)	284-287
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	220-222
DOIs	https://doi.org/10.1016/0022-3115(94)00429-3
State	Published - 1995
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

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10.1016/0022-3115(94)00429-3

Cite this

Fielding, S. J., Ashall, J. D., Axon, K. B., Bamford, R. A., Booth, M., Carolan, P. G., Edlington, T., Edwards, A. M., Ferreira, J., Gates, D., Gerasimov, S., Hugill, J., Lloyd, B., Manhood, S. J., Morris, A. W., O'Connell, R., Robinson, D. C., Simpson, P. R., Stammers, K., ... Valovic̆, M. (1995). Ohmic H-mode power thresholds and recycling on COMPASS-D. Journal of Nuclear Materials, 220-222, 284-287. https://doi.org/10.1016/0022-3115(94)00429-3

@article{16564a51094d461f8b87382486e20271,

title = "Ohmic H-mode power thresholds and recycling on COMPASS-D",

abstract = "Single null X-point discharges on COMPASS-D show a gradual L to H transition. Frequent boronization gives long ELM-free H-mode periods, duration 〉 100 ms, with continuously rising density to 〉 1.5 × 1010 m−3. The LH transition threshold behaviour is more complex than that predicted by present simple scaling laws, with a well-defined low-density limit being observed and sensitivity to small perturbations at the plasma boundary. Density and recycling behaviour is analysed. In discharges refuelled by recycling alone, the coefficient of recycling as well as the particle confinement time is higher in H-mode periods.",

author = "Fielding, \{S. J.\} and Ashall, \{J. D.\} and Axon, \{K. B.\} and Bamford, \{R. A.\} and M. Booth and Carolan, \{P. G.\} and T. Edlington and Edwards, \{A. M.\} and J. Ferreira and D. Gates and S. Gerasimov and J. Hugill and B. Lloyd and Manhood, \{S. J.\} and Morris, \{A. W.\} and R. O'Connell and Robinson, \{D. C.\} and Simpson, \{P. R.\} and K. Stammers and J. Tomas and Todd, \{T. N.\} and M. Valovi{\u c}",

year = "1995",

doi = "10.1016/0022-3115(94)00429-3",

language = "English (US)",

volume = "220-222",

pages = "284--287",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

}

Fielding, SJ, Ashall, JD, Axon, KB, Bamford, RA, Booth, M, Carolan, PG, Edlington, T, Edwards, AM, Ferreira, J, Gates, D, Gerasimov, S, Hugill, J, Lloyd, B, Manhood, SJ, Morris, AW, O'Connell, R, Robinson, DC, Simpson, PR, Stammers, K, Tomas, J, Todd, TN & Valovic̆, M 1995, 'Ohmic H-mode power thresholds and recycling on COMPASS-D', Journal of Nuclear Materials, vol. 220-222, pp. 284-287. https://doi.org/10.1016/0022-3115(94)00429-3

TY - JOUR

T1 - Ohmic H-mode power thresholds and recycling on COMPASS-D

AU - Fielding, S. J.

AU - Ashall, J. D.

AU - Axon, K. B.

AU - Bamford, R. A.

AU - Booth, M.

AU - Carolan, P. G.

AU - Edlington, T.

AU - Edwards, A. M.

AU - Ferreira, J.

AU - Gates, D.

AU - Gerasimov, S.

AU - Hugill, J.

AU - Lloyd, B.

AU - Manhood, S. J.

AU - Morris, A. W.

AU - O'Connell, R.

AU - Robinson, D. C.

AU - Simpson, P. R.

AU - Stammers, K.

AU - Tomas, J.

AU - Todd, T. N.

AU - Valovic̆, M.

PY - 1995

Y1 - 1995

N2 - Single null X-point discharges on COMPASS-D show a gradual L to H transition. Frequent boronization gives long ELM-free H-mode periods, duration 〉 100 ms, with continuously rising density to 〉 1.5 × 1010 m−3. The LH transition threshold behaviour is more complex than that predicted by present simple scaling laws, with a well-defined low-density limit being observed and sensitivity to small perturbations at the plasma boundary. Density and recycling behaviour is analysed. In discharges refuelled by recycling alone, the coefficient of recycling as well as the particle confinement time is higher in H-mode periods.

AB - Single null X-point discharges on COMPASS-D show a gradual L to H transition. Frequent boronization gives long ELM-free H-mode periods, duration 〉 100 ms, with continuously rising density to 〉 1.5 × 1010 m−3. The LH transition threshold behaviour is more complex than that predicted by present simple scaling laws, with a well-defined low-density limit being observed and sensitivity to small perturbations at the plasma boundary. Density and recycling behaviour is analysed. In discharges refuelled by recycling alone, the coefficient of recycling as well as the particle confinement time is higher in H-mode periods.

UR - https://www.scopus.com/pages/publications/22244445938

UR - https://www.scopus.com/inward/citedby.url?scp=22244445938&partnerID=8YFLogxK

U2 - 10.1016/0022-3115(94)00429-3

DO - 10.1016/0022-3115(94)00429-3

M3 - Article

AN - SCOPUS:22244445938

SN - 0022-3115

VL - 220-222

SP - 284

EP - 287

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Ohmic H-mode power thresholds and recycling on COMPASS-D

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