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Languages : en
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TECHNICAL PROGRESS REPORT FOR ICRF [ION CYCLOTRON RANGE OF FREQUENCIES] EDGE MODELING.
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Author: ICRF -ION CYCLOTRON RANGE OF FREQUENCIES] EDGE MODELING.
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Author: I.S. LEHRMANICRF [ION CYCLOTRON RANGE OF FREQUENCIES] EDGE MODELING STUDIES.
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Author: I.S. LEHRMAN.Energy Research Abstracts
Author: ICRF (Ion Cyclotron Range of Frequencies) Edge Modeling Studies
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Languages : en
Pages : 28
Book Description
Theoretical models have been developed, and are currently being refined, to explain the edge plasma-antenna interaction that occurs during ICRF heating. The periodic structure of a Faraday shielded antenna is found to result in strong ponderomotive force in the vicinity of the antenna. A fluid model, which incorporates the ponderomotive force, shows an increase in transport to the Faraday shield. A kinetic model shows that the strong antenna near fields act to increase the energy of deuterons which strike the shield, thereby increasing the sputtering of shield material. Estimates of edge impurity harmonic heating no significant heating for either in or out-of-phase antenna operation. Additionally, a particle model for electrons near the shield shows that heating results from the parallel electric field associated with the fast wave. A quasilinear model for edge electron heating is presented and compared to the particle calculations. The models' predictions are shown to be consistent with measurements of enhanced transport. 19 refs., 9 figs.
Scientific and Technical Aerospace Reports
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Category : Aeronautics
Languages : en
Pages : 538
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
High Beta and Second Region Stability Analysis and ICRF Edge Modeling. Progress Report, March 15, 1988--May 14, 1989
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 28
Book Description
This report describes the tasks accomplished under Department of Energy contract {number_sign}DE-FG02-86ER53236 in modeling the edge plasma-antenna interaction that occurs during Ion Cyclotron Range of Frequency (ICRF) heating. This work has resulted in the development of several codes which determine kinetic and fluid modifications to the edge plasma. When used in combination, these code predict the level of impurity generation observed in experiments on the experiments on the Princeton Large Torus. In addition, these models suggest improvements to the design of ICRF antennas. Also described is progress made on high beta and second region analysis. Code development for a comprehensive infernal mode analysis code is nearing completion. A method has been developed for parameterizing the second region of stability and is applied to circular cross section tokamas. Various studies for high beta experimental devices such as PBX-M and DIII-D have been carried out and are reported on.
TFTR Ion Cyclotron Range of Frequencies (ICRF) Experimental Data Analysis Collaboration. Annual Progress Report, December 1, 1993--November 30, 1994
Author: High Beta and Second Region Stability Analysis and ICRF Edge Modeling
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 28
Book Description
This report describes the tasks accomplished under Department of Energy contract [number sign]DE-FG02-86ER53236 in modeling the edge plasma-antenna interaction that occurs during Ion Cyclotron Range of Frequency (ICRF) heating. This work has resulted in the development of several codes which determine kinetic and fluid modifications to the edge plasma. When used in combination, these code predict the level of impurity generation observed in experiments on the experiments on the Princeton Large Torus. In addition, these models suggest improvements to the design of ICRF antennas. Also described is progress made on high beta and second region analysis. Code development for a comprehensive infernal mode analysis code is nearing completion. A method has been developed for parameterizing the second region of stability and is applied to circular cross section tokamas. Various studies for high beta experimental devices such as PBX-M and DIII-D have been carried out and are reported on.
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