scholarly journals Scattering of relativistic electron beams by magnetic field errors and beam‐induced waves

1977 ◽  
Vol 48 (12) ◽  
pp. 4968-4972 ◽  
Author(s):  
Gregory Benford
Keyword(s):  
Magnetic Field ◽  
Relativistic Electron ◽  
Electron Beams ◽  
Relativistic Electron Beams ◽  
Field Errors

Scattering of relativistic electron beams in a plasma by beam-induced waves and magnetic field errors

1986 ◽  
Vol 35 (1) ◽  
pp. 165-175 ◽  
Author(s):  
Gregory Benford
Keyword(s):  
Magnetic Field ◽  
Relativistic Electron ◽  
Applied Field ◽  
Electron Beams ◽  
Plasma Heating ◽  
Inertial Fusion ◽  
Relativistic Electron Beams ◽  
Electric And Magnetic Fields ◽  
Field Errors ◽  
Magnetic Waves

Relativistic electron beams propagating in plasma broaden as electric and magnetic fields scatter them. We calculate the beam spreading expected from errors in the ambient magnetic field, and from both electrostatic and magnetic waves generated by the beam itself. All these effects can be important in contemplated experimental regimes. Beam expansion can serve to set limits on the strength, size and phase velocity of caviton waves. Beam-driven magnetic waves can scatter beams effectively even if applied field errors are small. This can affect schemes for transport of beams in inertial fusion, and plasma heating schemes.

Enhanced relativistic electron beams intensity with self-generated resistive magnetic field

2020 ◽  
Vol 36 ◽  
pp. 100773
Author(s):  
Huan Li ◽  
Shohei Sakata ◽  
Tomoyuki Johzaki ◽  
Xiaobin Tang ◽  
Kazuki Matsuo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Relativistic Electron ◽  
Electron Beams ◽  
Relativistic Electron Beams

scholarly journals Observations of two-stream collisional instability due to interaction of monoenergetic relativistic electron beams with gas

1993 ◽  
Vol 11 (3) ◽  
pp. 595-609
Author(s):  
V.M. Batenin ◽  
A.V. Danilov ◽  
A.O. Ikonnikov ◽  
S.A. Ilchenko ◽  
A.T. Kunavin ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Relativistic Electron ◽  
Electron Beams ◽  
Gas Pressure ◽  
Microwave Emission ◽  
Experimental Setup ◽  
Penetration Length ◽  
Relativistic Electron Beams ◽  
Stream Instability ◽  
Interaction Chamber

We have studied experimentally the beam-plasma two-stream dissipative collisional instability of relativistic electron beams (REB) injected into plasma produced by interaction of REB with neutral nitrogen. The gas pressure ranged from 0.02 to 8 Torr. REB (T = 100 μs, E = 300 keV, 7 = 3–15 A) were injected into gas through a pulsed foilless valve. An external magnetic field was not used. A description of the experimental setup and that of applied diagnostics are presented. In some of the experiments the inner walls of a metallic interaction chamber were covered with microwave-absorbent material. We present the experimental dependence of the critical current of two-stream instability on gas pressure and beam penetration length. We have also measured the distribution of microwave emission along the beam axis. The influence of plasma self-radiation on the instability was observed and is attributed to a feedback. A possible mechanism of the feedback is discussed.

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