Published 1987
| Version v1
Miscellaneous
A theory of the coherent fundamental plasma emission in Tokamaks
Creators
- 1. Instituto de Pesquisas Espaciais, Sao Jose dos Campos, SP (Brazil)
Description
A theoretical model of coherent radiation near the fundamental plasma frequency in tokamaks is proposed. It is shown that, in the presence of runaway electrons, the beam-generated Langmuir waves (L) can be parametrically converted into electromagnetic waves (T) through ponderomotive coupling to ion acoustic waves (S). Two types of pumps are considered: travelling wave pump and standing wave pump. Expressions are derived for the excitation conditions and the growth rates of electromagnetic decay instabilities (L-> T + S), electromagnetic fusion instabilities (L + S -> T) and electromagnetic oscillating two-stream instabilities (L -> T+- S*, where S* is a purely growing mode). (author)
Availability note (English)
Available from the Library of Comissao Nacional de Energia Nuclear, RJ, Brazil.Abstract (Portuguese)
Um modelo teorico de radiacao coerente proxima a frequencia fundamental de plasmas em tokamaks e proposto. Mostra-se que, na presenca de eletrons de fuga, as ondas de Langmuir geradas por feixe (L) podem ser parametricamente convertidas em ondas eletromagneticas (T) atraves do acoplamento ponderomotivo a ondas ion-acusticas (S). Dois tipos de sondagens sao considerados: sondagem por onda rolante e sondagem por onda estacionaria. Expressoes sao deduzidas para condicoes de excitacao e taxas de crescimento das instabilidades de decaimento eletromagnetico ( l -> T + S), instabilidades de fusao eletromagnetica (L+ S -> T) e instabilidades de dois fluxos de oscilacoes eletromagnetica (L -> T +- S *, onde S* e um modelo puramente de crescimento). (M.C.K.)Additional details
Publishing Information
- Imprint Title
- Proceedings of the Energy Independence Conference: Fusion Energy and Plasma Physics
- Imprint Pagination
- 892 p.
- Journal Page Range
- p. 418-426.
Conference
- Title
- Fusion Energy and Plasma Physics.
- Acronym
- Energy Independence Conference
- Dates
- 17-21 Aug 1987.
- Place
- Rio de Janeiro, RJ (Brazil).
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 20050444
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Resource subtype / Literary indicator
- Conference, Non-conventional Literature
- Descriptors DEI
- PLASMA; TOKAMAK DEVICES
- Descriptors DEC
- CLOSED PLASMA DEVICES; THERMONUCLEAR DEVICES