Transverse beam temperature effects on mixed Two-Stream/Filamentation unstable modes

✍ Scribed by A. Bret; M.-C. Firpo; C. Deutsch

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 240 KB
• Volume: 544
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2005.01.272

✦ Synopsis

We investigate transverse beam temperature effects on the coupling between Two-Stream and Filamentation instabilities for an electron beam passing through a hot plasma with return current. By denoting y k ; the angle between the wave vector and the beam, transverse beam temperature effects are important for y k larger than a critical angle y c which can be determined exactly, the resulting effects being a damping of the instabilities. On the other hand, effects are small for y k oy c : In particular, the absolute maximum growth rate is found for a wave vector in this region and is therefore not damped by transverse beam temperature.