Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 870-882 |
| Number of pages | 13 |
| Journal | Nuclear Fusion |
| Volume | 43 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2003 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- JET
- plasma
- Tokamak
- fusion energy
- fusion reactors
- algorithms
- internal transport barriers
Cite this
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Real-time control of the q-profile in JET for steady state advanced tokamak operation. / Moreau, D.; Crisanti, F. ; Litaudon, X. ; Mazon, D. ; De Vries, P.; Felton, R. ; Joffrin, E.; Laborde, L.; Lennholm, M.; Murari, A.; Pericoli-Ridolfini, V. ; Riva, M.; Tala, T.; Tresset, G.; Zabeo, L.; Zastrow, K.D.; Workprogramme, EFDA-JET.
In: Nuclear Fusion, Vol. 43, No. 9, 2003, p. 870-882.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Real-time control of the q-profile in JET for steady state advanced tokamak operation
AU - Moreau, D.
AU - Crisanti, F.
AU - Litaudon, X.
AU - Mazon, D.
AU - De Vries, P.
AU - Felton, R.
AU - Joffrin, E.
AU - Laborde, L.
AU - Lennholm, M.
AU - Murari, A.
AU - Pericoli-Ridolfini, V.
AU - Riva, M.
AU - Tala, T.
AU - Tresset, G.
AU - Zabeo, L.
AU - Zastrow, K.D.
AU - Workprogramme, EFDA-JET
PY - 2003
Y1 - 2003
N2 - In order to simultaneously control the current and pressure profiles in high performance tokamak plasmas with internal transport barriers (ITB), a multi-variable model-based technique has been proposed. New algorithms using a truncated singular value decomposition (TSVD) of a linearized model operator and retaining the distributed nature of the system have been implemented in the JET control system. Their simplest versions have been applied to the control of the current density profile in reversed shear plasmas using three heating and current drive actuators (neutral beam injection, ion cyclotron resonant frequency heating and lower hybrid current drive). Successful control of the safety factor profile has been achieved in the quasi-steady-state, on a timescale of the order of the current redistribution time. How the TSVD algorithm will be used in the forthcoming campaigns for the simultaneous control of the current profile and of the ITB temperature gradient is discussed in some detail, but this has not yet been attempted in the present pioneering experiments.
AB - In order to simultaneously control the current and pressure profiles in high performance tokamak plasmas with internal transport barriers (ITB), a multi-variable model-based technique has been proposed. New algorithms using a truncated singular value decomposition (TSVD) of a linearized model operator and retaining the distributed nature of the system have been implemented in the JET control system. Their simplest versions have been applied to the control of the current density profile in reversed shear plasmas using three heating and current drive actuators (neutral beam injection, ion cyclotron resonant frequency heating and lower hybrid current drive). Successful control of the safety factor profile has been achieved in the quasi-steady-state, on a timescale of the order of the current redistribution time. How the TSVD algorithm will be used in the forthcoming campaigns for the simultaneous control of the current profile and of the ITB temperature gradient is discussed in some detail, but this has not yet been attempted in the present pioneering experiments.
KW - JET
KW - plasma
KW - Tokamak
KW - fusion energy
KW - fusion reactors
KW - algorithms
KW - internal transport barriers
U2 - 10.1088/0029-5515/43/9/311
DO - 10.1088/0029-5515/43/9/311
M3 - Article
VL - 43
SP - 870
EP - 882
JO - Nuclear Fusion
JF - Nuclear Fusion
SN - 0029-5515
IS - 9
ER -