scholarly journals Ultrafast High-Energy Electron Radiography Application in Magnetic Field Delicate Structure Measurement

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
J. H. Xiao ◽  
Y. C. Du ◽  
S. Z. Zhang ◽  
Y. T. Zhao
Keyword(s):  
Magnetic Field ◽  
Continuous Distribution ◽  
High Energy ◽  
Energy Electron ◽  
High Energy Density ◽  
Gradient Field ◽  
High Energy Electron ◽  
Quadrupole Magnet ◽  
Transient Electromagnetic ◽  
Magnetic Strength

Transient electromagnetic field plays very important roles in the evolution of high-energy-density matter or laser plasma. Now, a new design is proposed in this paper to diagnose the transient magnetic field, using relativistic electron bunch as a probe based on high-energy electron radiography. And based on this scheme, the continuous distribution of magnetic strength field can be snapshotted. For 1 mm thick quadrupole magnet model measured by 50 MeV probe electron beams, the simulation result indicates that this diagnosis has spatial resolution better than 4 microns and high measurement accuracy for strong magnetic strength and high magnetic gradient field no matter whether the magnetic interaction is focusing or defocusing for the range from -510 T ∗ μm to 510 T ∗ μm.

Effect of dust particle and magnetic field on EEPF and plasma oscillation

2019 ◽  
Vol 85 (4) ◽  
Author(s):  
D. Kalita ◽  
B. Kakati ◽  
S. S. Kausik ◽  
B. K. Saikia ◽  
M. Bandyopadhyay
Keyword(s):  
Magnetic Field ◽  
Plasma Oscillation ◽  
Hydrogen Plasma ◽  
High Energy ◽  
Energy Electron ◽  
Dust Particles ◽  
High Energy Electron ◽  
Electron Population ◽  
Dust Density ◽  
Low Energy Electron

The significance of dust particles for the electron energy probability function (EEPF) and plasma oscillations is studied under varying magnetic field strength in a filamentary discharge hydrogen plasma. The experimental result shows that with an increase in dust density, the electron density decreases as a result of the charging of dust grains in the plasma background. A bi-Maxwellian EEPF is computed in both a pristine hydrogen plasma and a dust-containing plasma at different magnetic field strengths. We have observed that the increase in magnetic field decreases the lower energy electron population. The electron population of the lower energy range shows nearly identical results at magnetic field, $B\leqslant 3.7$  mT whereas the behaviour of the high-energy electron population becomes identical for a field strength $B\leqslant 5.8$  mT. From the observation, we have seen that the mid energy electron population slightly decreases and the high energy electron population slightly increases due to the presence of dust particles as compared to a pristine plasma. Further, very low energy electron population remains almost unchanged. With increase in dust density, the mid energy electron population further decreases whereas the high energy electron population slightly increases for different magnetic fields. But, no changes were observed for the very low energy electron population in the presence of dust particles. From the study of plasma oscillation, it is observed that the dominant frequency associated with the plasma oscillation is matched with the ion cyclotron frequency. The amplitude of the ion cyclotron frequency reduces with the increase of dust density which might be due to the decrease of plasma density.

Aluminum/vacuum multilayer configuration for spatial high-energy electron shielding via electron return effects induced by magnetic field

2017 ◽  
Vol 37 (2) ◽  
pp. 390-401 ◽  
Author(s):  
Tuo Chen ◽  
Xiaobin Tang ◽  
Feida Chen ◽  
Minxuan Ni ◽  
Hai Huang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Energy ◽  
Energy Electron ◽  
High Energy Electron

IBEX magnetic field extraction and propagation experiments of intense high‐energy electron beams

1987 ◽  
Vol 62 (10) ◽  
pp. 4024-4035 ◽  
Author(s):  
Michael G. Mazarakis ◽  
R. Bruce Miller ◽  
James W. Poukey ◽  
Richard J. Adler
Keyword(s):  
Magnetic Field ◽  
Electron Beams ◽  
High Energy ◽  
Energy Electron ◽  
High Energy Electron
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