Pulse-stimulated radiation from a plasma due to an energy-dependent gyrofrequency
- Creators
- Kegel, W. H.
Abstract
A plasma excited by two short pulses at the electron gyrofrequency which have a time separation τ, is considered in the single particle approach. It is shown that the relativistic mass effect can lead to a series of radiation maxima after the second pulse. In the case of a cold plasma in an inhomogeneous magnetic field these maxima arise at multiples of the time τ; in the case of a warm plasma in a homogeneous magnetic field at multiples of τ/|1 ± D|, where D is the strength of the second pulse relative to the first one. The shape of the radiation maxima is given by the square of the Fourier transform of the distribution of the inhomogeneities or the initial energies, respectively. The two effects have the tendency to cancel each other. (i) If the plasma is excited by three pulses, the time separation of the second and third pulse being T, radiation maxima occur at times t = Kτ + LT, (±K, L = 0, 1, 2,... but t > 0) after the third pulse in the case of cold plasma with field inhomogeneities, and at t = (Kτ + LT)/|1 ± D ± D_2| in the case of a warm plasma. (ii) If collisions are taken into account the dependence on T of the radiation maxima with L = 0 is determined by inelastic collisions only, while the other decay times are determined by all kinds of collisions.
Additional Information
© 1967 Pergamon Press. Received 22 May 1966. This work was sponsored by the U.S. Navy, Office of Naval Research. It is a pleasure to thank Professor R. W. Gould for several very stimulating discussions. The results of Section 3 were partially derived in collaboration with him (Kegel and Gould, 1965).Attached Files
Submitted - TR000375.pdf
Files
Name | Size | Download all |
---|---|---|
md5:f07b4850e30c92686a8a9f34efc28a0c
|
1.1 MB | Preview Download |
Additional details
- Eprint ID
- 35047
- DOI
- 10.1088/0032-1028/9/1/304
- Resolver ID
- CaltechAUTHORS:20121023-145118475
- Office of Naval Research (ONR)
- Created
-
2012-10-23Created from EPrint's datestamp field
- Updated
-
2023-05-25Created from EPrint's last_modified field
- Caltech groups
- Electron Tube and Microwave Laboratory
- Other Numbering System Name
- Electron Tube and Microwave Laboratory Technical Report
- Other Numbering System Identifier
- 35