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Fast wave at 433 MHz on FTU by a folded waveguide launcher [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1993.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
4 pages : digital, PDF file
Additional Creators
Oak Ridge National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The use of fast wave (FW) power to interact directly with electrons is a useful tool for central heating of high density, high temperature plasmas and for electron current drive (CD). Direct electron heating by FW has been observed on JET and TFTR and, although FW absorption is weak at low β, successful electron heating and CD have been achieved on DIII-D at Te=2--3keV. The folded waveguide (FWG) is a promising new concept for ICRF launchers having the advantage of compact, rigid structure and very low impedence (E{sub y}/H{sub z}) at the plasma edge. The FWG is particularly attractive for FTU since loop antennas suffer efficiency degradation at high frequency due to poloidal current decrease, whereas the RF flux coupled by a FWG is more poloidally uniform. Here we consider the possibility of injecting ∼ 1 MW of FW at 433 MHz into the FTU-Tokamak using the FWG as a launcher. Besides testing the FWG, and studying the FW electron heating regime, an other interesting issue of this experiment would be the study of possible sinergy between FW and the lower hybrid wave (LHW) at 8 GHz which is also available on FTU. The main parameters of FTU are a=30 cm, R₀=90 cm, B{sub T}=4--8 T, I{sub p}<1.5MA, n{sub e}=0.4--2.0 10¹⁴cm{sup −3}.
Report Numbers
E 1.99:conf-930720--20
conf-930720--20
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Note
Published through SciTech Connect.
10/01/1993.
"conf-930720--20"
"DE94000375"
20. European conference on controlled fusion and plasma physics,Lisbon (Portugal),26-30 Jul 1993.
Carter, M.D.; Hoffman, D.J.; Jaeger, E.F.; Batchelor, D.B.; Baity, F.W.; Goldfinger, R.; Barbato, E.; De Marco, F.
Funding Information
AC05-84OR21400
View MARC record | catkey: 14744666