Access Restriction

Author Mutoh, T. ♦ Kumazawa, R. ♦ Watari, T. ♦ Nishimura, K. ♦ Sinbo, F. ♦ Kuroda, T. ♦ Okada, H. ♦ Fukuyama, A.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1991
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword Helical antennas ♦ Heating ♦ Plasma devices ♦ Surface resistance ♦ Cyclotrons ♦ Frequency ♦ Physics ♦ Power engineering and energy ♦ Cooling ♦ Voltage
Abstract Design of the ICRF (ion cyclotron range of frequencies) fast-wave heating antenna in the Large Helical Device is discussed. From the physics viewpoint, the optimization of the deposition profiles and the suppression of the loss cone and parasitic heating at the peripheral region are studied. From the engineering viewpoint, long pulse operation and high power coupling are discussed. Cooling system design for the operation time of over 30 min with a several-MW power level is studied. As a result, loss cone problems for the ICRF heating in the helical device are solved or largely improved in the new antenna design. Calculations of plasma loading resistance and maximum voltage on the transmission line show that the optimum antenna position is at a moderate distance from the plasma surfaces. This is due to the relatively large space between the plasma and vacuum wall at the antenna setting point.<<ETX>>
Description Author affiliation: Nat. Inst. for Fusion Sci., Nagoya, Japan (Mutoh, T.; Kumazawa, R.; Watari, T.; Nishimura, K.; Sinbo, F.; Kuroda, T.; Okada, H.; Fukuyama, A.)
ISBN 0780301323
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1991-09-30
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 316.11 kB
Page Count 4
Starting Page 103
Ending Page 106

Source: IEEE Xplore Digital Library