Plasma start-up results with electron cyclotron assisted breakdown on Frascati Tokamak Upgrade (Articolo in rivista)

Type
Label
  • Plasma start-up results with electron cyclotron assisted breakdown on Frascati Tokamak Upgrade (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0029-5515/51/7/073042 (literal)
Alternative label
  • Granucci, G [ 1 ] ; Ramponi, G [ 1 ] ; Calabro, G [ 2 ] ; Crisanti, F [ 2 ] ; Nowak, S [ 1 ] ; Ramogida, G [ 2 ] ; Tudisco, O [ 2 ] ; Bin, W [ 1 ] ; Botrugno, A [ 2 ] ; Buratti, P [ 2 ] ; D'Arcangelo, O [ 1 ] ; Frigione, D [ 2 ] ; Pucella, G [ 2 ] ; Romano, A [ 2 ]; and ASDEX Upgrade Team (2011)
    Plasma start-up results with electron cyclotron assisted breakdown on Frascati Tokamak Upgrade
    in Nuclear fusion; IOP Publishing Ltd., Bristol BS1 6BE (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Granucci, G [ 1 ] ; Ramponi, G [ 1 ] ; Calabro, G [ 2 ] ; Crisanti, F [ 2 ] ; Nowak, S [ 1 ] ; Ramogida, G [ 2 ] ; Tudisco, O [ 2 ] ; Bin, W [ 1 ] ; Botrugno, A [ 2 ] ; Buratti, P [ 2 ] ; D'Arcangelo, O [ 1 ] ; Frigione, D [ 2 ] ; Pucella, G [ 2 ] ; Romano, A [ 2 ]; and ASDEX Upgrade Team (literal)
Pagina inizio
  • 073042 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://iopscience.iop.org/0029-5515/51/7/073042/ (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 51 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [ 1 ] IFP CNR, Assoc EURATOM ENEA, I-20125 Milan, Italy [ 2 ] CR Frascati, Assoc EURATOM ENEA, I-00044 Rome, Italy (literal)
Titolo
  • Plasma start-up results with electron cyclotron assisted breakdown on Frascati Tokamak Upgrade (literal)
Abstract
  • Several experiments aimed at optimizing plasma pre-ionization using electron cyclotron (EC) waves have been carried out on many tokamaks in recent years as the basis of a multi-machine comparison study made to define the best operation scenarios for ITER, where the plasma breakdown will have to be achieved with a toroidal electric field of only 0.3Vm(-1). The FTU (Frascati Tokamak Upgrade, R = 0.935 m, a = 0.3m) contribution to this study is the main subject of this work. A reduction in electric field, as can be obtained with pre-ionization by ECH, can lower the transformer flux consumption in the start-up phase leading to a longer plasma current flat top. This point is of particular interest in the conceptual design of the steady-state scenario of the proposed FAST tokamak and has also been addressed. In the FTU experiment the scan in pre-filling pressure has evidenced the capability of EC power to increase, by a factor 4, the range of working pressure useful for plasma start-up. Varying the breakdown a minimum electric field of 0.41Vm(-1) has been found with 0.8MW of EC in perpendicular injection. A scan in magnetic field has evidenced that plasma start-up is likely insensitive to alignment between EC resonance and null position. A total transformer flux saving of 22% has been found acting on plasma resistivity (by increasing electron temperature) and on the plasma starting point (for an internal inductance reduction). (literal)
Editore
Prodotto di
Autore CNR

Incoming links:


Autore CNR di
Prodotto
Editore di
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it