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Title: High power Ion Cyclotron Resonance Heating (ICRH) in JET

Abstract

Ion Cyclotron Resonance Heating (ICRH) powers of up to 17 MW have been coupled to JET limiter plasmas. The plasma stored energy has reached 7 MJ with 13 MW of RF in 5 MA discharges with Z/sub eff/ = 2. When I/sub p//B/sub /phi// = 1 MA/T the stored energy can be 50% greater than the Goldston L mode scaling. This is due to transient stabilisation of sawteeth (up to 3 s) and to a significant energy content in the minority particles accelerated by RF (up to 30% of the total stored energy). Central temperatures of T/sub e/ - 11 keV and T/sub i/ = 8 keV have been reached with RF alone. (He/sup 3/)D fusion experiments have given a 60 kW fusion yield (fusion rate of 2 /times/ 10/sup 16/ s/sup /minus/1/ in the form of energetic fast particles (14.7 MeV(H), 3.6 MeV(He/sup 4/)) in agreement with modelling. When transposing the same calculation to a (D)T scenario, Q is predicted to be between 0.l2 and 0.8 using plasma parameters already achieved. For the first time, a peaked density profile generated by pellet injection could be reheated and sustained by ICRF for 1.2 s. Electron heat transport in the centralmore » region is reduced by a factor 2 to 3. The fusion product n/sub io//tau//sub E/T/sub io/ reaches 2.2 /times/ 10/sup 20/ m/sup /minus/3//center dot/s/center dot/kev in 3 MA discharges which is a factor of 2.3 times larger than with normal density profile. 18 refs., 13 figs., 3 tabs.« less

Authors:
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (USA)
OSTI Identifier:
7080545
Report Number(s):
CONF-880534-14
ON: DE89002218
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Conference
Resource Relation:
Conference: 15. European conference on controlled fusion and plasma heating, Dubrovnik, Yugoslavia, 16 May 1988; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ICR HEATING; JET TOKAMAK; ANTENNAS; CONFINEMENT TIME; ELECTRON DENSITY; ELECTRON TEMPERATURE; FUSION YIELD; ION TEMPERATURE; LIMITERS; PELLET INJECTION; PLASMA CONFINEMENT; CONFINEMENT; ELECTRICAL EQUIPMENT; EQUIPMENT; HEATING; HIGH-FREQUENCY HEATING; NUCLEAR REACTION YIELD; PLASMA HEATING; THERMONUCLEAR REACTORS; TOKAMAK TYPE REACTORS; YIELDS; 700101* - Fusion Energy- Plasma Research- Confinement, Heating, & Production

Citation Formats

Jacquinot, J. High power Ion Cyclotron Resonance Heating (ICRH) in JET. United States: N. p., 1988. Web.
Jacquinot, J. High power Ion Cyclotron Resonance Heating (ICRH) in JET. United States.
Jacquinot, J. Fri . "High power Ion Cyclotron Resonance Heating (ICRH) in JET". United States. https://www.osti.gov/servlets/purl/7080545.
@article{osti_7080545,
title = {High power Ion Cyclotron Resonance Heating (ICRH) in JET},
author = {Jacquinot, J},
abstractNote = {Ion Cyclotron Resonance Heating (ICRH) powers of up to 17 MW have been coupled to JET limiter plasmas. The plasma stored energy has reached 7 MJ with 13 MW of RF in 5 MA discharges with Z/sub eff/ = 2. When I/sub p//B/sub /phi// = 1 MA/T the stored energy can be 50% greater than the Goldston L mode scaling. This is due to transient stabilisation of sawteeth (up to 3 s) and to a significant energy content in the minority particles accelerated by RF (up to 30% of the total stored energy). Central temperatures of T/sub e/ - 11 keV and T/sub i/ = 8 keV have been reached with RF alone. (He/sup 3/)D fusion experiments have given a 60 kW fusion yield (fusion rate of 2 /times/ 10/sup 16/ s/sup /minus/1/ in the form of energetic fast particles (14.7 MeV(H), 3.6 MeV(He/sup 4/)) in agreement with modelling. When transposing the same calculation to a (D)T scenario, Q is predicted to be between 0.l2 and 0.8 using plasma parameters already achieved. For the first time, a peaked density profile generated by pellet injection could be reheated and sustained by ICRF for 1.2 s. Electron heat transport in the central region is reduced by a factor 2 to 3. The fusion product n/sub io//tau//sub E/T/sub io/ reaches 2.2 /times/ 10/sup 20/ m/sup /minus/3//center dot/s/center dot/kev in 3 MA discharges which is a factor of 2.3 times larger than with normal density profile. 18 refs., 13 figs., 3 tabs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

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