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F. Alladio, B. Angelini, M. L. Apicella,
G. Apruzzese, E. Barbato, M. R. Belforte1,
L. Bertalot, A. Bertocchi, M. Borra, G. Bracco,
A. Bruschi2, G. Buceti, P. Buratti,
A. Cardinali, C. Castaldo1, C. Centioli,
R. Cesario, P. Chuilon, C. Cianfarani1,
S. Ciattaglia, S. Cirant2, V. Cocilovo,
F. Crisanti, R. de Angelis, F. de Marco, B. Esposito,
M. Finkenthal3, K. Fournier4, D. Frigione,
L. Gabellieri, G. Gatti, E. Giovannozzi,
W. H. Goldstein4, C. Gourlan, F. Gravanti,
G. Granucci2, B. C. Gregory5, M. Grolli,
F. Iannone, H. Kroegler, M. Leigheb, G. Maddaluno,
G. Maffia, M. Marinucci, M. May3, G. Mazzitelli,
P. Micozzi, F. Mirizzi, F. P. Orsitto, D. Pacella,
V. Pericoli-Ridolfini, L. Pieroni, S. Podda,
G. B. Righetti, F. Romanelli, F. Santini, M. Sassi,
S. E. Segre6, A. Simonetto2, E. Sternini,
C. Sozzi2, N. Tartoni, B. Tilia, A. A. Tuccillo,
O. Tudisco, V. Vitale, G. Vlad, V. Zanza,
M. Zerbini, F. Zonca
Associazione Euratom-ENEA sulla Fusione, CRE Frascati,
00044, Frascati, Roma, Italy
1 ENEA fellow
2 Associazione Euratom-ENEA-CNR sulla Fusione, Milano, Italy
3 The John Hopkins University, Baltimore, MD 21218, USA
4 Lawrence Livermore National Laboratories, Livermore, CA 94550, USA
5 Institut National de la Recherche Scientifique (INRS), Montreal, Canada
6 INFM and Il Universitá di Roma `Tor Vergata', Roma, Italy
Abstract. An overview over the Frascati Tokamak Upgrade results during the
period 1996-1998 is presented. Most of the activity has been devoted to the
investigation of the electron heat transport with flat/nonmonotonic safety
factor profiles. Up to 14 keV of electron temperature have been obtained using
electron cyclotron resonance heating (ECRH) on the current ramp. The transport
analysis shows a very low electron heat transport in the region with
flat/monotonic safety factor profile. The electron thermal conductivity is
strongly dependent on the MHD activity and it drops to values of the order
0.1m2/s in the absence of MHD fluctuations. Upon varying the resonance
position in steady state conditions the effect of the ECRH on the sawtooth
stabilization has been also investigated. Lower hybrid current drive studies
have been performed in order to investigate the dependence of the current
drive efficiency with density. Previous results of the Alcator C tokamak
pointed out that at high density rather low efficiency values were
obtained. The investigation carried out on FTU shows that such a result can be
explained as due to the electron temperature dependence of the current drive
efficiency. No degradation of the current drive efficiency is indeed observed
on FTU even at density values of the order
1020m- 3. Ion Bernstein
wave (IBW) heating studies have been also carried out in order to check the
behaviour of wave-plasma coupling which is found in agreement with linear
theory. Finally, impurity transport studies have been carried out. It has been
possible to have a direct measurement of the flux of Mo33 which turns out to
be in agreement with the expectation of quasilinear theory.
IAEA 2001
