Causal Link of Longitudinal Plasma Density Structure to Vertical Plasma Drift and Atmospheric Tides – A Review

2011 ◽  
pp. 349-361 ◽  
Author(s):  
Hyosub Kil ◽  
Larry J. Paxton
Keyword(s):  
Plasma Density ◽  
Causal Link ◽  
Atmospheric Tides ◽  
Density Structure ◽  
Plasma Drift ◽  
Longitudinal Plasma

scholarly journals The role of the vertical <I><B>E</B></I>×<I><B>B</B></I> drift for the formation of the longitudinal plasma density structure in the low-latitude F region

2008 ◽  
Vol 26 (7) ◽  
pp. 2061-2067 ◽  
Author(s):  
S.-J. Oh ◽  
H. Kil ◽  
W.-T. Kim ◽  
L. J. Paxton ◽  
Y. H. Kim
Keyword(s):  
Plasma Density ◽  
Model Simulation ◽  
Wave Number ◽  
Density Structure ◽  
Low Latitude ◽  
Model Simulations ◽  
Drift Model ◽  
F Region ◽  
Vertical Drift ◽  
Longitudinal Plasma

Abstract. The formation of a longitudinally periodic plasma density structure in the low-latitude F region by the effect of vertical E×B drift was investigated by analyzing the ROCSAT-1 satellite data and conducting SAMI2 model simulations. The daytime equatorial ionosphere observed during the equinox in 1999–2002 from ROCSAT-1 showed the formation of wave number-4 structures in the plasma density and vertical plasma drift. The coincidence of the longitudes of the peak density with the longitudes of the peak upward drift velocity during the daytime supported the association of the longitudinal density structure with the vertical E×B drift. The reproduction capability of the observed wave-4 structure by the effect of vertical E×B drift was tested by conducting SAMI2 model simulations during the equinox under solar maximum condition. When the ROCSAT-1 vertical drift data were used, the SAMI2 model could reproduce the observed wave-4 density structure in the low-latitude F region. On the other hand, the SAMI2 model could not reproduce the observed wave-4 structure using the Scherliess and Fejer vertical E×B drift model. The observation and model simulation results demonstrated that the formation of the longitudinally periodic plasma density structure can be explained by the longitudinal variation of the daytime vertical E×B drift.

scholarly journals Causal link of the wave-4 structures in plasma density and vertical plasma drift in the low-latitude ionosphere

2009 ◽  
Vol 114 (A10) ◽  
pp. n/a-n/a ◽  
Author(s):  
T.-W. Fang ◽  
H. Kil ◽  
G. Millward ◽  
A. D. Richmond ◽  
J.-Y. Liu ◽  
...  
Keyword(s):  
Plasma Density ◽  
Causal Link ◽  
Low Latitude ◽  
Plasma Drift ◽  
Low Latitude Ionosphere

scholarly journals Relativistic Single-Cycle Tunable Infrared Pulses Generated from a Tailored Plasma Density Structure

2018 ◽  
Author(s):  
Zan Nie ◽  
Chih-Hao Pai ◽  
Jianfei Hua ◽  
Chaojie Zhang ◽  
Wei Lu ◽  
...  
Keyword(s):  
Plasma Density ◽  
Density Structure ◽  
Single Cycle

scholarly journals Electron energy increase in a laser wakefield accelerator using up-ramp plasma density profiles

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Constantin Aniculaesei ◽  
Vishwa Bandhu Pathak ◽  
Hyung Taek Kim ◽  
Kyung Hwan Oh ◽  
Byung Ju Yoo ◽  
...  
Keyword(s):  
Electron Energy ◽  
Plasma Density ◽  
Density Profile ◽  
Density Profiles ◽  
Plasma Density Profile ◽  
Peak Energy ◽  
Laser Wakefield ◽  
Longitudinal Plasma ◽  
Wakefield Accelerator ◽  
Laser Wakefield Accelerator

Abstract The phase velocity of the wakefield of a laser wakefield accelerator can, theoretically, be manipulated by shaping the longitudinal plasma density profile, thus controlling the parameters of the generated electron beam. We present an experimental method where using a series of shaped longitudinal plasma density profiles we increased the mean electron peak energy more than 50%, from 175 ± 1 MeV to 262 ± 10 MeV and the maximum peak energy from 182 MeV to 363 MeV. The divergence follows closely the change of mean energy and decreases from 58.9 ± 0.45 mrad to 12.6 ± 1.2 mrad along the horizontal axis and from 35 ± 0.3 mrad to 8.3 ± 0.69 mrad along the vertical axis. Particle-in-cell simulations show that a ramp in a plasma density profile can affect the evolution of the wakefield, thus qualitatively confirming the experimental results. The presented method can increase the electron energy for a fixed laser power and at the same time offer an energy tunable source of electrons.

scholarly journals Relativistic single-cycle tunable infrared pulses generated from a tailored plasma density structure

2018 ◽  
Vol 12 (8) ◽  
pp. 489-494 ◽  
Author(s):  
Zan Nie ◽  
Chih-Hao Pai ◽  
Jianfei Hua ◽  
Chaojie Zhang ◽  
Yipeng Wu ◽  
...  
Keyword(s):  
Plasma Density ◽  
Density Structure ◽  
Single Cycle

Modulation of plasmaspheric hiss intensity by thermal plasma density structure

2012 ◽  
Vol 39 (14) ◽  
pp. n/a-n/a ◽  
Author(s):  
Lunjin Chen ◽  
Richard M. Thorne ◽  
Wen Li ◽  
Jacob Bortnik ◽  
Drew Turner ◽  
...  
Keyword(s):  
Plasma Density ◽  
Thermal Plasma ◽  
Density Structure
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