scholarly journals Solar-minimum quiet time ion energization and outflow in dynamic boundary related coordinates

2008 ◽  
Vol 113 (A7) ◽  
pp. n/a-n/a ◽  
Author(s):  
W. K. Peterson ◽  
L. Andersson ◽  
B. C. Callahan ◽  
H. L. Collin ◽  
J. D. Scudder ◽  
...  
Keyword(s):  
Solar Minimum ◽  
Quiet Time ◽  
Dynamic Boundary ◽  
Ion Energization

Quiet-time solar wind superhalo electrons at solar minimum

2013 ◽  
Author(s):  
Linghua Wang ◽  
Robert P. Lin ◽  
Chadi Salem ◽  
Marc Pulupa ◽  
Davin E. Larson ◽  
...  
Keyword(s):  
Solar Wind ◽  
Solar Minimum ◽  
Quiet Time

scholarly journals QUIET-TIME INTERPLANETARY ∼2-20 keV SUPERHALO ELECTRONS AT SOLAR MINIMUM

2012 ◽  
Vol 753 (1) ◽  
pp. L23 ◽  
Author(s):  
Linghua Wang ◽  
Robert P. Lin ◽  
Chadi Salem ◽  
Marc Pulupa ◽  
Davin E. Larson ◽  
...  
Keyword(s):  
Solar Minimum ◽  
Quiet Time

Energy spectra of carbon and oxygen - Predictions from HELIOS E6 for Solar Orbiter HET

2020 ◽  
Author(s):  
Johannes Marquardt ◽  
Bernd Heber ◽  
Robert Elftmann ◽  
Robert Wimmer-Schweingruber
Keyword(s):  
Energetic Particle ◽  
Solar Minimum ◽  
Cosmic Ray ◽  
High Energy ◽  
Energy Spectra ◽  
Particle Detector ◽  
Quiet Time ◽  
Transport Models ◽  
Galactic Cosmic Ray ◽  
Insight Into

<p>Anomalous cosmic rays (ACRs) are well-suited to probe the transport conditions of energetic particles in the innermost heliosphere. We revisit the HELIOS Experiment 6 (E6) data in view of the upcoming Solar Orbiter Energetic Particle Detector (EPD) suite that will perform measurements during a comparable solar minimum within the same distance.</p><p>Adapting the HELIOS energy ranges for oxygen and carbon to the ones given by the High Energy Telescope (HET) allows us to determine predictions for the upcoming measurements but also to put constraints on particle transport models that provide new insight into the boundary conditions close to the Sun.</p><p>We present here the adapted energy spectra of galactic cosmic ray (GCR) carbon and oxygen, as well as of ACR oxygen during solar quiet time periods between 1975 to 1977. Due to the higher energy threshold of HET in comparison to E6 gradients of about 20% at 15 MeV/nucleon are expected. The largest ACR gradient measured by E6 was obtained to be about 75% between 9 and 13 MeV/nucleon and 0.4 AU and 1 AU.</p>

Quiet-time properties of low-energy (less than 10 MeV per nucleon) interplanetary ions during solar maximum and solar minimum

1990 ◽  
Vol 363 ◽  
pp. L9 ◽  
Author(s):  
I. G. Richardson ◽  
D. V. Reames ◽  
K.-P. Wenzel ◽  
J. Rodriguez-Pacheco
Keyword(s):  
Solar Minimum ◽  
Solar Maximum ◽  
Low Energy ◽  
Quiet Time

scholarly journals Unusual behavior of quiet-time zonal and vertical plasma drift velocities over Jicamarca during the recent extended solar minimum of 2008

2017 ◽  
Vol 35 (6) ◽  
pp. 1219-1229 ◽  
Author(s):  
Ângela M. Santos ◽  
Mangalathayil A. Abdu ◽  
Jonas R. Souza ◽  
Inez S. Batista ◽  
José H. A. Sobral
Keyword(s):  
Zonal Wind ◽  
Solar Minimum ◽  
Anomalous Behavior ◽  
Quiet Time ◽  
Unusual Behavior ◽  
Plasma Drift ◽  
Ionosphere Model ◽  
Early Afternoon ◽  
Minimum Solar Activity ◽  
Magnetometer Data

Abstract. The influence of the recent deep and prolonged solar minimum on the daytime zonal and vertical plasma drift velocities during quiet time is investigated in this work. Analyzing the data obtained from incoherent scatter radar from Jicamarca (11.95° S, 76.87° W) we observe an anomalous behavior of the zonal plasma drift during June 2008 characterized by lower than usual daytime westward drift and its early afternoon reversal to eastward. As a case study the zonal drift observed on 24 June 2008 is modeled using a realistic low-latitude ionosphere simulated by the Sheffield University Plasmasphere-Ionosphere Model-INPE (SUPIM-INPE). The results show that an anomalously low zonal wind was mainly responsible for the observed anomalous behavior in the zonal drift. A comparative study of the vertical plasma drifts obtained from magnetometer data for some periods of maximum (2000–2002) and minimum solar activity (1998, 2008, 2010) phases reveal a considerable decrease on the E-region conductivity and the dynamo electric field during 2008. However, we believe that the contribution of these characteristics to the unusual behavior of the zonal plasma drift is significantly smaller than that arising from the anomalously low zonal wind. The SUPIM-INPE result of the critical frequency of the F layer (foF2) over Jicamarca suggested a lower radiation flux than that predicted by solar irradiance model (SOLAR2000) for June 2008.

scholarly journals Quiet-time low energy ion spectra observed on Solar Orbiter during solar minimum

2021 ◽  
Author(s):  
G. M. Mason ◽  
G. C. Ho ◽  
R. C. Allen ◽  
Z. G. Xu ◽  
N. P. Janitzek ◽  
...  
Keyword(s):  
Solar Minimum ◽  
Low Energy ◽  
Quiet Time

scholarly journals Observations of quiet time vertical ion drift in the equatorial ionosphere during the solar minimum period of 2009

2011 ◽  
Vol 116 (A12) ◽  
pp. n/a-n/a ◽  
Author(s):  
R. A. Stoneback ◽  
R. A. Heelis ◽  
A. G. Burrell ◽  
W. R. Coley ◽  
B. G. Fejer ◽  
...  
Keyword(s):  
Solar Minimum ◽  
Equatorial Ionosphere ◽  
Quiet Time ◽  
Minimum Period ◽  
Ion Drift
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