Neutral Particle Flux Measurements in a Plasma Wind Tunnel

1969 ◽  
Vol 12 (11) ◽  
pp. 2323 ◽  
Author(s):  
R. M. Patrick
Keyword(s):  
Wind Tunnel ◽  
Particle Flux ◽  
Neutral Particle ◽  
Flux Measurements

Fast-Response transient heat flux measurements in a plasma wind tunnel

2021 ◽  
Vol 173 ◽  
pp. 121234
Author(s):  
Byrenn Birch ◽  
David Buttsworth ◽  
Stefan Löhle ◽  
Fabian Hufgard
Keyword(s):  
Heat Flux ◽  
Wind Tunnel ◽  
Fast Response ◽  
Flux Measurements ◽  
Transient Heat Flux

Framework to model neutral particle flux in convex high aspect ratio structures using one-dimensional radiosity

2017 ◽  
Vol 128 ◽  
pp. 141-147 ◽  
Author(s):  
Paul Manstetten ◽  
Lado Filipovic ◽  
Andreas Hössinger ◽  
Josef Weinbub ◽  
Siegfried Selberherr
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Particle Flux ◽  
Neutral Particle ◽  
One Dimensional

scholarly journals Particle flux measurements with pump limiters

1987 ◽  
Vol 145-147 ◽  
pp. 798-802 ◽  
Author(s):  
P. Mioduszewski
Keyword(s):  
Particle Flux ◽  
Flux Measurements

scholarly journals On the structure of field-aligned currents in the mid-altitude cusp

2006 ◽  
Vol 24 (12) ◽  
pp. 3391-3401 ◽  
Author(s):  
A. Marchaudon ◽  
J.-C. Cerisier ◽  
J.-M. Bosqued ◽  
C. J. Owen ◽  
A. N. Fazakerley ◽  
...  
Keyword(s):  
Current Density ◽  
Particle Flux ◽  
Convective Motion ◽  
Magnetic Fluctuations ◽  
Current Sheets ◽  
Total Particle ◽  
Flux Measurements ◽  
Parallel Current ◽  
Particle Current ◽  
East West

Abstract. We analyse two crossings of the polar cusp at mid-altitudes (≈4 RE) by Cluster in order to study the structure of field-aligned currents associated with the injection of magnetosheath plasma. The current density is deduced independently from magnetic field and from particle flux measurements. In both cases the data are carefully tested. Magnetic fluctuations are analysed by discriminating between those compatible with the plane current sheet hypothesis under which the current density can be calculated safely, and those resulting from filamentary current structures. At medium transverse scales (80 km), the structure of the currents is more often tube-like than sheet-like, and current sheets are not systematically elongated in the east-west direction. The total particle current is calculated from the electron and ion measurements. For electrons, the full energy range is taken into account, from above the photoelectron threshold up to 32 keV. Magnetosheath plasma injections are well correlated with pairs of field-aligned currents. In both cases, the parallel current is mainly carried by electrons while ions contribute for about 20%. In the plane current sheets, the ratio between magnetic and particle currents shows large variations between 0.4 and 1.1. These fluctuations can be explained by the convective motion of the current sheets.

scholarly journals Interpretation of increased energetic particle flux measurements by SEPT aboard the STEREO spacecraft and contamination

2018 ◽  
Vol 611 ◽  
pp. A100 ◽  
Author(s):  
S. Wraase ◽  
B. Heber ◽  
S. Böttcher ◽  
R. Bucik ◽  
N. Dresing ◽  
...  
Keyword(s):  
Energetic Particle ◽  
Particle Flux ◽  
Interplanetary Medium ◽  
Relativistic Electrons ◽  
Response Functions ◽  
Flux Measurements ◽  
Energetic Particle Flux ◽  
Flux Increase ◽  
Good Agreement

Context. Interplanetary (IP) shocks are known to be accelerators of energetic charged particles observed in-situ in the heliosphere. However, the acceleration of near-relativistic electrons by shocks in the interplanetary medium is often questioned. On 9 August 2011 a corotating interaction region (CIR) passed STEREO B (STB), which resulted in a flux increase in the electron and ion channels of the Solar Electron and Proton Telescope (SEPT). Because electron measurements in the few keV to several 100 keV range rely on the so-called magnet foil technique, which is utilized by SEPT, ions can contribute to the electron channels. Aim. We aim to investigate whether the flux increase in the electron channels of SEPT during the CIR event on 9 August 2011 is caused by ion contamination only. Methods. We compute the SEPT response functions for protons and helium utilizing an updated GEANT4 model of SEPT. The CIR energetic particle ion spectra for protons and helium are assumed to follow a Band function in energy per nucleon with a constant helium to proton ratio. Results. Our analysis leads to a helium to proton ratio of 16.9% and a proton flux following a Band function with the parameters I0 = 1.24 × 104 (cm2 s sr MeV nuc−1)−1, Ec = 79 keV nuc−1, and spectral indices of γ1 = −0.94 and γ2 = −3.80, which are in good agreement with measurements by the Suprathermal Ion Telescope (SIT) aboard STB. Conclusions. Since our results explain the SEPT measurements, we conclude that no significant amount of electrons were accelerated between 55 and 425 keV by the CIR.

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