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Title: Lithium wall conditioning by high frequency pellet injection in RFX-mod

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1252230
Grant/Contract Number:
P12-03
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 463; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-03 21:20:18; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Innocente, P., Mansfield, D. K., Roquemore, A. L., Agostini, M., Barison, S., Canton, A., Carraro, L., Cavazzana, R., De Masi, G., Fassina, A., Fiameni, S., Grando, L., Rais, B., Rossetto, F., and Scarin, P. Lithium wall conditioning by high frequency pellet injection in RFX-mod. Netherlands: N. p., 2015. Web. doi:10.1016/j.jnucmat.2014.11.088.
Innocente, P., Mansfield, D. K., Roquemore, A. L., Agostini, M., Barison, S., Canton, A., Carraro, L., Cavazzana, R., De Masi, G., Fassina, A., Fiameni, S., Grando, L., Rais, B., Rossetto, F., & Scarin, P. Lithium wall conditioning by high frequency pellet injection in RFX-mod. Netherlands. doi:10.1016/j.jnucmat.2014.11.088.
Innocente, P., Mansfield, D. K., Roquemore, A. L., Agostini, M., Barison, S., Canton, A., Carraro, L., Cavazzana, R., De Masi, G., Fassina, A., Fiameni, S., Grando, L., Rais, B., Rossetto, F., and Scarin, P. Sat . "Lithium wall conditioning by high frequency pellet injection in RFX-mod". Netherlands. doi:10.1016/j.jnucmat.2014.11.088.
@article{osti_1252230,
title = {Lithium wall conditioning by high frequency pellet injection in RFX-mod},
author = {Innocente, P. and Mansfield, D. K. and Roquemore, A. L. and Agostini, M. and Barison, S. and Canton, A. and Carraro, L. and Cavazzana, R. and De Masi, G. and Fassina, A. and Fiameni, S. and Grando, L. and Rais, B. and Rossetto, F. and Scarin, P.},
abstractNote = {},
doi = {10.1016/j.jnucmat.2014.11.088},
journal = {Journal of Nuclear Materials},
number = C,
volume = 463,
place = {Netherlands},
year = {Sat Aug 01 00:00:00 EDT 2015},
month = {Sat Aug 01 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.jnucmat.2014.11.088

Citation Metrics:
Cited by: 1work
Citation information provided by
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  • The fundamental question of how the flow velocity of the background plasma can influence the motion of magnetohydrodynamics instabilities and, in the ultimate analysis, their stability is addressed. The growth of resistive-wall-mode instabilities in toroidal confinement devices well represents one example of such a problem. In this Letter, we illustrate a new strategy that allowed, for the first time in a reversed field pinch experiment, a fully controlled rotation of a nonresonant instability by means of a set of active coils and how the new findings compare with numerical modeling.
  • The injection of small deuterium pellets at high repetition rates up to 12 the natural edge localized mode (ELM) frequency has been used to trigger high-frequency ELMs in otherwise low natural ELM frequency H-mode deuterium discharges in the DIII-D tokamak [J. L. Luxon and L. G. Davis, Fusion Technol. 8, 441 (1985)]. The resulting pellet-triggered ELMs result in up to 12 lower energy and particle fluxes to the divertor than the natural ELMs. The plasma global energy confinement and density are not strongly affected by the pellet perturbations. The plasma core impurity density is strongly reduced with the application ofmore » the pellets. These experiments were performed with pellets injected from the low field side pellet in plasmas designed to match the ITER baseline configuration in shape and normalized operation with input heating power just above the H-mode power threshold. Nonlinear MHD simulations of the injected pellets show that destabilization of ballooning modes by a local pressure perturbation is responsible for the pellet ELM triggering. This strongly reduced ELM intensity shows promise for exploitation in ITER to control ELM size while maintaining high plasma purity and performance.« less
  • The injection of small deuterium pellets at high repetition rates up to 12× the natural edge localized mode (ELM) frequency has been used to trigger high-frequency ELMs in otherwise low natural ELM frequency H-mode deuterium discharges in the DIII-D tokamak [J. L. Luxon and L. G. Davis, Fusion Technol. 8, 441 (1985)]. The resulting pellet-triggered ELMs result in up to 12× lower energy and particle fluxes to the divertor than the natural ELMs. The plasma global energy confinement and density are not strongly affected by the pellet perturbations. The plasma core impurity density is strongly reduced with the application ofmore » the pellets. These experiments were performed with pellets injected from the low field side pellet in plasmas designed to match the ITER baseline configuration in shape and normalized β operation with input heating power just above the H-mode power threshold. Nonlinear MHD simulations of the injected pellets show that destabilization of ballooning modes by a local pressure perturbation is responsible for the pellet ELM triggering. This strongly reduced ELM intensity shows promise for exploitation in ITER to control ELM size while maintaining high plasma purity and performance.« less