scholarly journals Ion cyclotron waves during a great magnetic storm observed by Freja double-probe electric field instrument

1998 ◽  
Vol 103 (A3) ◽  
pp. 4145-4155 ◽  
Author(s):  
T. Bräysy ◽  
K. Mursula ◽  
G. Marklund
Keyword(s):  
Electric Field ◽  
Magnetic Storm ◽  
Double Probe ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron ◽  
Electric Field Instrument

The Spin-Plane Double Probe Electric Field Instrument for MMS

2016 ◽  
pp. 137-165 ◽  
Author(s):  
P.-A. Lindqvist ◽  
G. Olsson ◽  
R. B. Torbert ◽  
B. King ◽  
M. Granoff ◽  
...  
Keyword(s):  
Electric Field ◽  
Double Probe ◽  
Spin Plane ◽  
Electric Field Instrument

Direct Measurement of Ion Cyclotron Resonance Between Wave Fields and Protons in Space Plasmas

2021 ◽  
Author(s):  
Qiaowen Luo ◽  
Xingyu Zhu ◽  
Jiansen He ◽  
Jun Cui ◽  
Hairong Lai ◽  
...  
Keyword(s):  
Kinetic Theory ◽  
Electric Field ◽  
Velocity Distribution ◽  
Wave Field ◽  
Cyclotron Resonance ◽  
Space Plasmas ◽  
Ion Cyclotron Resonance ◽  
Wave Fields ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron

<p>Ion cyclotron resonance is one of the fundamental energy conversion processes through wave field-particle interaction in collisionless plasma. However, the key evidence for cyclotron resonance (i.e., the coherence between wave field and ion phase space density pertaining to the ion cyclotron resonance and responsible for the dissipation of ion cyclotron waves (ICWs)) has yet to be directly observed. Based on the high-quality measurements of space plasma by the Magnetospheric Multiscale (MMS) satellites, we observe that both the wave electromagnetic field vectors and the disturbed ion velocity distribution rotate around the background magnetic field. Moreover, we find that the gyrophase angle difference between the fluctuations in the ion velocity distribution functions and the wave electric field vectors are always in the range of (0, 90) degrees, clearly suggesting the ongoing energy conversion from wave fields to particles. By invoking plasma kinetic theory, we find that the field-particle correlation for the dissipative ion cyclotron waves in the theoretical model matches well with our observations. Furthermore, all the wave electric field vectors (Ewave), the ion current (Ji) and the energy transfer rate (Ji ·Ewave) exhibit quasi-periodic oscillations, and the frequency of Ji ·Ewave is about twice the frequency of Ewave and Ji, consistent with plasma kinetic theory. Therefore, our combined analysis of MMS observations and kinetic theory provides direct, thorough, and comprehensive evidence for ICW dissipation in space plasmas.</p>

scholarly journals The Spin-Plane Double Probe Electric Field Instrument for MMS

2014 ◽  
Vol 199 (1-4) ◽  
pp. 137-165 ◽  
Author(s):  
P.-A. Lindqvist ◽  
G. Olsson ◽  
R. B. Torbert ◽  
B. King ◽  
M. Granoff ◽  
...  
Keyword(s):  
Electric Field ◽  
Double Probe ◽  
Spin Plane ◽  
Electric Field Instrument

scholarly journals In-flight calibration of double-probe electric field measurements on Cluster

2014 ◽  
Vol 3 (2) ◽  
pp. 143-151 ◽  
Author(s):  
Y. V. Khotyaintsev ◽  
P.-A. Lindqvist ◽  
C. M. Cully ◽  
A. I. Eriksson ◽  
M. André
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Field Measurements ◽  
Calibration Procedure ◽  
Double Probe ◽  
Term Evolution ◽  
Electric Field Measurements ◽  
Electric Field Instrument

Abstract. Double-probe electric field instrument with long wire booms is one of the most popular techniques for in situ measurement of electric fields in plasmas on spinning spacecraft platforms, which have been employed on a large number of space missions. Here we present an overview of the calibration procedure used for the Electric Field and Wave (EFW) instrument on Cluster, which involves spin fits of the data and correction of several offsets. We also describe the procedure for the offset determination and present results for the long-term evolution of the offsets.

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