Microwave Studies of Magnetically Induced Counterstreaming Interactions in Laser-Produced Plasma
With a single wire conductor, microwave radiation can be guided through a plasma so that high spatial resolution (~0.5 cm) can be realized at X-band frequencies (λ ≃ 3 cm). Dispersion relations governing a longitudinally magnetized single wire cavity filled with a plasma have been calculated. A Fabry-Perot single wire cavity capable of giving fast time resolution (~50 nanoseconds) was used to study momentum couplings between a flowing laser-produced plasma (U ~ 107 cm/sec) and a photoionized background. The results indicate a collisionless coupling occurs when a 700 gauss transverse external magnetic field is present. Such couplings may be due to the onset of magnetized two-stream instabilities.
KeywordsLaser Plasma Langmuir Probe Single Wire Interferometer System Momentum Transfer Cross Section
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