The stability of the central region of the triple delta distribution function for a migma is shown to be reducible to the analysis of fourth and sixth order ordinary differential equations for radial electrostatic modes, including axial oscillations and electron shielding effects. A normal mode study shows that a cylindrically counterstriming ion instability appears for ωpi > ωci. This effect should attenuated by the introduction of some spread in pθ. It is noted that a spherical system of counterstreaming beams is stable for radial modes. An instability of the Harristpe is discussed with a migma slab model, which includes finite axial extent and a bias electric field. It is suggested that a microinstability observed during the Migma IV experiment was stabilized by the combined influence of small axial wavelenghts and electron heating. © 1988.
Documento: | Artículo |
Título: | Models of ion beam interactions for the stability analysis of migma |
Autor: | Gnavi, G.; Gratton, F.T. |
Filiación: | Laboratorio Fisica del Plasma, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina |
Palabras clave: | Ion Beams; Magnetic Fields; Harris Instability; Migma; Plasmas |
Año: | 1988 |
Volumen: | 271 |
Número: | 1 |
Página de inicio: | 112 |
Página de fin: | 116 |
DOI: | http://dx.doi.org/10.1016/0168-9002(88)91132-1 |
Título revista: | Nuclear Inst. and Methods in Physics Research, A |
Título revista abreviado: | Nucl Instrum Methods Phys Res Sect A |
ISSN: | 01689002 |
CODEN: | NIMAE |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01689002_v271_n1_p112_Gnavi |