Microwave production from a plasma driven by a high power relativistic electron beam
Microwave emission from an unmagnetized, electron beam driven plasma has been measured. Argon, contained in a Lucite tube, is pre-ionized by a 90 ..mu..s, 90 A electron source. The electron current is then injected into the tube. A diode is placed over the tube's aperture as the electron source for the microwave radiation. A spectrometer measures the output from 2 to 47 GHz in 3 bands. The emission takes place in two distinct phases. The 2 to 6 GHz output rises promptly with current pulse and then decays. For 6 GHz and above, there appears a low level microwave prepulse simultaneous with the 2 to 6 GHz output. This output rises sharply 25 ns after the current pulse begins, and includes frequencies beyond 40 GHz. The radio frequency output falls off before the current pulse ends. The microwave intensity decays monotonically with frequency. (JDH)
- Research Organization:
- Lawrence Livermore National Lab., CA (USA); California Univ., Davis (USA). Dept. of Applied Science
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6639147
- Report Number(s):
- UCRL-94639; CONF-861240-16; ON: DE87003518
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
BEAM INJECTION HEATING
BEAMS
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELEMENTS
ENERGY SPECTRA
FLUIDS
FREQUENCY DEPENDENCE
GASES
HEATING
LEPTON BEAMS
MICROWAVE RADIATION
NONMETALS
PARTICLE BEAMS
PLASMA
PLASMA HEATING
RADIATIONS
RARE GASES
SPECTRA