ITER H mode confinement database update

Thomsen, K.; Campbell, D.J.; Cordey, J.G.; Kardaun, O.; Ryter, F.; Stroth, U.; Kus, A.; DeBoo, J. C.; Schissel, D.P.; Miura, Y.; Suzuki, Norio; Mori, Masahiro; Matsuda, Toshiaki; Tamai, Hiroshi; Takizuka, T.; Itoh, Sanae I.; Itoh, K.; Kaye, S. M.

doi:10.1088/0029-5515/34/1/i10

Cited by 122 publications

(82 citation statements)

References 9 publications

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“…For example, in ITER hysteresis allows an opportunity to reach H-mode at low density because it is easier to obtain. Several L-H threshold power scaling laws tend to yield linear density scaling with acceptable agreement with experimental results [2,[4][5][6]. Then, one can raise the density to the desirable level while keeping the heating at constant [1].…”

Section: Introductionmentioning

confidence: 54%

Understanding of Hysteresis Behaviors at the L‐H‐L Transitions in Tokamak Plasma Based on Bifurcation Concept

Chatthong

Onjun

2016

Contrib. Plasma Phys.

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The hysteresis behaviour at the L-H-L transitions in tokamak plasma is investigated based on bifurcation concept. The formation of an edge transport barrier (ETB) is modeled via thermal and particle transport equations with the flow shear suppression effect on anomalous transport included. The anomalous transport is modeled based on critical gradients threshold and the flow shear is calculated from the force balance equation, couples the two transport equations leading to a non-linear behaviour. Analytical investigation reveals that the fluxes versus gradients space exhibits bifurcation behaviour with s-curve soft bifurcation type. Apparently, the backward H-L transition occurs at lower values than that of the forward L-H transition, illustrating hysteresis behaviour. The hysteresis properties, i.e. locations of threshold fluxes, gradients and their ratios are analyzed as a function of neoclassical and anomalous transport values and critical gradients. It is found that the minimum heat flux for maintaining H-mode depends on several plasma parameters including the strength of anomalous transport and neoclassical transport. In particular, the hysteresis depth becomes larger when neoclassical transport decreases or anomalous transport increases.

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Section: Introductionmentioning

confidence: 54%

Understanding of Hysteresis Behaviors at the L‐H‐L Transitions in Tokamak Plasma Based on Bifurcation Concept

Chatthong

Onjun

2016

Contrib. Plasma Phys.

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“…Alpha particle heating: In our calculations we shall assume that the energy released to the alpha particles through fusion processes is fully delivered to the plasma through collisions. The heating power thus obtained is approximately given by (5) with E fus replaced by E α , i.e.…”

Section: External Heatingmentioning

confidence: 99%

Thermonuclear Burn Criteria

Rebhan

Oost

2012

Fusion Science and Technology

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“…In D-T, a record steady-state fusion Q performance (Q=0.22) was achieved with ICRH alone in JET 9 . At the occasion of the compilation of transport databases for ITER, it was noted that no significant differences in heating efficiency can be observed between the RF (ICRH and ECRH) subset and the rest of the database 10 . Although it is generally the case that the heating efficiency is equivalent for all auxiliary heating methods, there are cases where differences are observed.…”

Section: Ig Database and Applicationsmentioning

confidence: 99%

The Ion Cyclotron, Lower Hybrid and Alfven Wave Heating Methods

Koch

2000

Fusion Technology

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This lecture covers the practical features and experimental results of the three heating methods. The emphasis is on ion cyclotron heating. First, we briefly come back to the main non-collisional heating mechanisms and to the particular features of the quasilinear coefficient in the ion cyclotron range of frequencies (ICRF). The specific case of the ion-ion hybrid resonance is treated, as well as the polarisation issue and minority heating scheme. The various ICRF scenarios are reviewed. The experimental applications of ion cyclotron resonance heating (ICRH) systems are outlined. Then, the lower hybrid and Alfvén wave heating and current drive experimental results are covered more briefly. Where applicable, the prospects for ITER are commented.

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ITER H mode confinement database update

Cited by 122 publications

References 9 publications

Understanding of Hysteresis Behaviors at the L‐H‐L Transitions in Tokamak Plasma Based on Bifurcation Concept

Understanding of Hysteresis Behaviors at the L‐H‐L Transitions in Tokamak Plasma Based on Bifurcation Concept

Thermonuclear Burn Criteria

The Ion Cyclotron, Lower Hybrid and Alfven Wave Heating Methods

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