Articolo in rivista, 2009, ENG

A New Launcher for Real-Time ECRH Experiments on FTU

Bruschi A.; Bin W.; Cirant S.; Granucci G.; Mantovani; Moro A.; Nowak S.

1. CNR EURATOM ENEA Assoc, Ist Fis Plasma, I-20125 Milan, Italy 2. Assoc EURATOM ENEA Fus, CR Frascati, I-00044 Frascati, Italy

The development of electron cyclotron resonance heating (ECRH)-electron cyclotron current drive (ECCD) as a tool for suppression of plasma instabilities requires that the millimeter-wave beams used for testing magnetohydrodynamic (MHD) stabilization schemes for ITER be able to follow magnetic island position in real time. In the FTU tokamak, the design of a new ECRH fast-steerable launcher will enable a fast-controlled trolled deposition at a precise poloidal location and the inclusion of the mirror motion in a feedback loop aimed at MHD stabilization. Two of the four existing transmission lines will be switched to the new launcher located in a different equatorial port. It will launch two independent beams with radius in the plasma changeable between 17 and 28 mm, in order to control the deposited power density. Real-time control of the poloidal steering requires high acceleration, speed, and positioning precision of the last mirror. Additionally, oblique toroidal injection at precise angles will allow current profile shaping through controlled ECCD and heating of overdense plasmas (n(e) > 2.4 X 10(20) m(-3)) using electron Bernstein waves. For optimal 04 conversion, the required toroidal angle, estimated with dedicated beam-tracing calculations, is close to +/-38.5 deg, near the upper limit in the toroidal steering angle. The launch requirements and their impact on the launcher design phase are presented in the paper.

Fusion science and technology 55 , pp. 94–107

Keywords

millimeter waves, ECRH launcher, MHD stabilization

CNR authors

Cirant Sante Giovanni, Granucci Gustavo, Bin William Maurizio, Moro Alessandro Andrea, Nowak Silvana, Bruschi Alessandro

CNR institutes

IFP – Istituto di fisica del plasma "Piero Caldirola"

ID: 23297

Year: 2009

Type: Articolo in rivista

Creation: 2010-07-22 00:00:00.000

Last update: 2022-04-20 09:19:04.000

External links

OAI-PMH: Dublin Core

OAI-PMH: Mods

OAI-PMH: RDF

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:23297

ISI Web of Science (WOS): 000262872300010

Scopus: 2-s2.0-59849125929