VELOCITY-JUMP AMPLIFICATION AT 10,000 MC./S.

1957 ◽  
Vol 35 (6) ◽  
pp. 742-752
Author(s):  
B. V. Dore
Keyword(s):  
General Theory ◽  
Space Charge ◽  
Electron Beams ◽  
Theoretical Development ◽  
Vacuum Tube ◽  
Microwave Frequencies ◽  
Moderate Agreement ◽  
Velocity Jump ◽  
Charge Wave ◽  
Space Charge Wave

A vacuum tube using the velocity-jump principle was built to amplify microwave frequencies in the vicinity of 10,000 Mc./s. The design of the tube was based on a similar structure that had been built to operate at a lower frequency. A general theory previously developed for space-charge wave amplifiers was applied to the operation of the tube, in conjunction with approximations made to the theory of coupling to electron beams by means of helices. The experimentally measured gain was in moderate agreement with that predicted by this theoretical development. Conclusions are drawn regarding the operation of coupling helices, and the effect of small gaps in the amplifying section of the tube.

Nonlinear space-charge wave propagation on thin annular electron beams

1984 ◽  
Vol 27 (7) ◽  
pp. 1808 ◽  
Author(s):  
D. L. Fenstermacher ◽  
C. E. Seyler
Keyword(s):  
Wave Propagation ◽  
Space Charge ◽  
Electron Beams ◽  
Charge Wave ◽  
Space Charge Wave

Space‐charge wave propagation on rippled electron beams

1976 ◽  
Vol 47 (10) ◽  
pp. 4464-4466 ◽  
Author(s):  
R. A. Mahaffey ◽  
D. B. Batchelor ◽  
A. W. Trivelpiece
Keyword(s):  
Wave Propagation ◽  
Space Charge ◽  
Electron Beams ◽  
Charge Wave ◽  
Space Charge Wave

scholarly journals Reactive medium instability of the space charge wave of ion beam in a plasma

1977 ◽  
Vol 64 (1) ◽  
pp. 53-55 ◽  
Author(s):  
Toshitaka Idehara ◽  
Kuni Nakajima ◽  
Yoshio Ishida
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Reactive Medium ◽  
Charge Wave ◽  
Space Charge Wave

Resonant flow instability of space-charge waves in self-gravitating Lorentzian dusty plasma columns

2019 ◽  
Vol 97 (6) ◽  
pp. 651-655
Author(s):  
Myoung-Jae Lee ◽  
Young-Dae Jung
Keyword(s):  
Growth Rate ◽  
Space Charge ◽  
Dusty Plasma ◽  
Plasma Column ◽  
Flow Instability ◽  
Mode Analysis ◽  
Instability Mode ◽  
Resonant Instability ◽  
Charge Wave ◽  
Space Charge Wave

The dispersion characteristics and the resonant instability mode of the space-charge wave are investigated in a streaming Lorentzian dusty plasma column by using the normal mode analysis. The result shows that the non-thermal character of the Lorentzian cylindrical dusty plasma enhances the unstable property of the space-charge wave due to the beam–plasma interaction. It is found that the resonant growth rates of the space-charge wave increase with an increase of the harmonic-order of the root of the Bessel function. It is also found that the influence of the self-gravitation enhances the resonant growth rate of the space-charge wave of the Lorentzian cylindrical dusty plasma. In addition, it is found the resonant growth rate decreases with an increase of the radius of the dusty plasma column. The variation of the resonant instability mode due to the non-thermal character and geometric effects is also discussed.

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