2019
DOI: 10.1029/2019ja026567
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Equatorial Propagation of the Magnetosonic Mode Across the Plasmapause: 2‐D PIC Simulations

Abstract: Recent studies have indicated that fast magnetosonic waves (also referred to as equatorial noise) excited far outside the plasmapause cannot propagate deep into the plasmasphere because of the preferential azimuthal propagation of the waves at the source region. Since conditions in the low-density plasma trough are typically favorable for the wave excitation, one possible explanation for the magnetosonic wave origin inside the plasmapause is refraction of the waves excited in the plasma trough but close to the… Show more

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Cited by 12 publications
(18 citation statements)
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References 67 publications
(192 reference statements)
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“…There are several widely used, analytical distribution functions of this kind (e.g., Chen et al, 2018; Horne et al, 2000; Liu et al, 2011). Here, consistent with our previous studies (Min, Boardsen, et al, 2018; Min, Liu, Denton, & Boardsen, 2018; Min et al, 2019; Min, Liu, Wang, et al, 2018), we use the partial shell velocity distribution given by fs,eqfalse(v,αfalse)=ns,eqπ3false/2θs3Cfalse(vsfalse/θsfalse)exp()false(vvsfalse)2θs2sin2Aα, where v=false|boldvfalse| is the velocity modulus; α is the pitch angle; A is the effective temperature anisotropy, A=Tfalse/Tfalse‖1; v s , and θ s are the ring (or shell) speed and the thermal spread of the shell, respectively; n s , eq is the number density, and C ( x ) is the normalization constant given by Cfalse(xfalse)=[]xex2+π()12+x2erfcfalse(xfalse)Γfalse(1+Afalse)Γfalse(3false/2+Afalse). …”
Section: Simulation Setupsupporting
confidence: 93%
See 1 more Smart Citation
“…There are several widely used, analytical distribution functions of this kind (e.g., Chen et al, 2018; Horne et al, 2000; Liu et al, 2011). Here, consistent with our previous studies (Min, Boardsen, et al, 2018; Min, Liu, Denton, & Boardsen, 2018; Min et al, 2019; Min, Liu, Wang, et al, 2018), we use the partial shell velocity distribution given by fs,eqfalse(v,αfalse)=ns,eqπ3false/2θs3Cfalse(vsfalse/θsfalse)exp()false(vvsfalse)2θs2sin2Aα, where v=false|boldvfalse| is the velocity modulus; α is the pitch angle; A is the effective temperature anisotropy, A=Tfalse/Tfalse‖1; v s , and θ s are the ring (or shell) speed and the thermal spread of the shell, respectively; n s , eq is the number density, and C ( x ) is the normalization constant given by Cfalse(xfalse)=[]xex2+π()12+x2erfcfalse(xfalse)Γfalse(1+Afalse)Γfalse(3false/2+Afalse). …”
Section: Simulation Setupsupporting
confidence: 93%
“…They noted that the lack of wave structure along the field line indicates the importance of the transit time effect over Landau resonance. On the other hand, Min, Boardsen, et al (2018) and Min et al (2019) carried out two‐dimensional PIC simulations of MSWs on the equatorial plane of the dipole magnetic field, focusing on the equatorial evolution with and without the steep density gradient of the plasmapause.…”
Section: Introductionmentioning
confidence: 99%
“…Particle‐in‐cell (PIC) codes (Dawson, ) and hybrid codes, which include the feedback from plasma to fields (e.g., Camporeale, ; Delzanno et al, ; Meierbachtol et al, ), allow the self‐consistent generation of the wave spectrum and no further assumption is required. PIC codes are used to investigate the self‐consistent mechanism of wave generation and growth in the radiation belts, such as chorus generation and enhancement (Fu et al, , ; Lu et al, ), whistler instability effects (Fan et al, ; Yoon et al, ) and saturation (Wu et al, ), and magnetosonic wave excitation (Chen et al, ) and propagation (Min et al, ). PIC codes are also used to test the validity of the quasilinear theory (e.g., Camporeale, ; Tao et al, ) and for computing spacecraft charging in the radiation belts (Delzanno et al, ; Lucco Castello et al, ).…”
Section: New Radiation Belt Modeling Capabilities and The Quantificatmentioning
confidence: 99%
“…When MS waves are excited in some source regions, they would propagate away from their source regions. For instance, MS waves would propagate into the plasmasphere after excited outside the plasmapause (X. Yu et al., 2021), and particularly, MS waves inside the plasmapause propagate dominantly in the radial direction (Min et al., 2019). Moreover, low‐frequency cut‐off of ELF waves has been reported in Gurnett and Burns (1968), suggesting that MS waves might be reflected at a low altitude as they propagate along the radiation directions.…”
Section: Introductionmentioning
confidence: 99%