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Effect of toroidal field ripple on the formation of internal transport barriers

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Abstract
The effect of a toroidal field (TF) ripple on the formation and performance of internal transport barriers (ITBs) has been studied in JET. It was found that the TF ripple had a profound effect on the toroidal plasma rotation. An increased TF ripple up to delta = 1% led to a lower rotation and reduced the rotational shear in the region where the ITBs were formed. ITB triggering events were observed in all cases and it is thought that the rotational shear may be less important for this process than, for example, the q-profile. However, the increase in the pressure gradient following the ITB trigger was reduced in discharges with a larger TF ripple and consequently a lower rotational shear. This suggests that toroidal rotation and its shear play a role in the growth of the ITB once it has been triggered.
Keywords
REVERSED SHEAR PLASMAS, JT-60U, STEADY-STATE OPERATION, ELECTRIC-FIELD, JET, TOKAMAK, PERFORMANCE, PHYSICS, EVOLUTION, ROTATION

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MLA
de Vries, P. C. et al. “Effect of Toroidal Field Ripple on the Formation of Internal Transport Barriers.” PLASMA PHYSICS AND CONTROLLED FUSION 50.6 (2008): AR065008. Print.
APA
de Vries, P. C., Joffrin, E., Hawkes, N. C., Litaudon, X., Challis, C. D., Andrew, Y., Beurskens, M., et al. (2008). Effect of toroidal field ripple on the formation of internal transport barriers. PLASMA PHYSICS AND CONTROLLED FUSION, 50(6), AR065008.
Chicago author-date
de Vries, P. C., E. Joffrin, N. C. Hawkes, X. Litaudon, C. D. Challis, Y. Andrew, M. Beurskens, et al. 2008. “Effect of Toroidal Field Ripple on the Formation of Internal Transport Barriers.” Plasma Physics and Controlled Fusion 50 (6): AR065008.
Chicago author-date (all authors)
de Vries, P. C., E. Joffrin, N. C. Hawkes, X. Litaudon, C. D. Challis, Y. Andrew, M. Beurskens, M. Brix, J. Brzozowski, Kristel Crombé, C. Giroud, J. Hobirk, T. Johnson, J. Lonnroth, A. Salmi, T. Tala, V. Yavorskij, and K-D Zastrow. 2008. “Effect of Toroidal Field Ripple on the Formation of Internal Transport Barriers.” Plasma Physics and Controlled Fusion 50 (6): AR065008.
Vancouver
1.
de Vries PC, Joffrin E, Hawkes NC, Litaudon X, Challis CD, Andrew Y, et al. Effect of toroidal field ripple on the formation of internal transport barriers. PLASMA PHYSICS AND CONTROLLED FUSION. 2008;50(6):AR065008.
IEEE
[1]
P. C. de Vries et al., “Effect of toroidal field ripple on the formation of internal transport barriers,” PLASMA PHYSICS AND CONTROLLED FUSION, vol. 50, no. 6, p. AR065008, 2008.
@article{745775,
  abstract     = {The effect of a toroidal field (TF) ripple on the formation and performance of internal transport barriers (ITBs) has been studied in JET. It was found that the TF ripple had a profound effect on the toroidal plasma rotation. An increased TF ripple up to delta = 1% led to a lower rotation and reduced the rotational shear in the region where the ITBs were formed. ITB triggering events were observed in all cases and it is thought that the rotational shear may be less important for this process than, for example, the q-profile. However, the increase in the pressure gradient following the ITB trigger was reduced in discharges with a larger TF ripple and consequently a lower rotational shear. This suggests that toroidal rotation and its shear play a role in the growth of the ITB once it has been triggered.},
  author       = {de Vries, P. C. and Joffrin, E. and Hawkes, N. C. and Litaudon, X. and Challis, C. D. and Andrew, Y. and Beurskens, M. and Brix, M. and Brzozowski, J. and Crombé, Kristel and Giroud, C. and Hobirk, J. and Johnson, T. and Lonnroth, J. and Salmi, A. and Tala, T. and Yavorskij, V. and Zastrow, K-D},
  issn         = {0741-3335},
  journal      = {PLASMA PHYSICS AND CONTROLLED FUSION},
  keywords     = {REVERSED SHEAR PLASMAS,JT-60U,STEADY-STATE OPERATION,ELECTRIC-FIELD,JET,TOKAMAK,PERFORMANCE,PHYSICS,EVOLUTION,ROTATION},
  language     = {eng},
  number       = {6},
  title        = {Effect of toroidal field ripple on the formation of internal transport barriers},
  url          = {http://dx.doi.org/10.1088/0741-3335/50/6/065008},
  volume       = {50},
  year         = {2008},
}

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