Radiation from Cerenkov Wakes in a Magnetized Plasma
1997; American Physical Society; Volume: 79; Issue: 21 Linguagem: Inglês
10.1103/physrevlett.79.4194
ISSN1092-0145
AutoresJ. Yoshii, Chyong‐Huey Lai, T. Katsouleas, C. Joshi, W. B. Mori,
Tópico(s)Atomic and Molecular Physics
ResumoThe Cerenkov wake excited by a particle beam or a short laser pulse in a perpendicularly magnetized plasma is analyzed. The wake couples to electromagnetic radiation of approximate frequency ${\ensuremath{\omega}}_{p}$ at the plasma/vacuum boundary. The radiation amplitude is ${\ensuremath{\omega}}_{c}/{\ensuremath{\omega}}_{p}$ times the amplitude of the wake excited in the plasma (for a sharp boundary). Particle-in-cell simulations verify the scaling laws. Since plasma wakes as high as a few GeV/m are produced in current experiments, the potential for a high-power (i.e., GW) coherent microwave to THz radiation source exists.
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