Measurement of magnetic fluctuations of electromagnetic plasma waves by cross-polarization scattering

1997 ◽  
Vol 68 (1) ◽  
pp. 454-457 ◽  
Author(s):  
A. Mase ◽  
L. G. Bruskin ◽  
N. Oyama ◽  
T. Tokuzawa ◽  
H. Inutake ◽  
...  
Keyword(s):  
Plasma Waves ◽  
Magnetic Fluctuations ◽  
Cross Polarization

Internal magnetic fluctuations and electron heat transport in the Tore Supra tokamak: Observation by cross-polarization scattering

1998 ◽  
Vol 38 (6) ◽  
pp. 903-918 ◽  
Author(s):  
L Colas ◽  
X.L Zou ◽  
M Paume ◽  
J.M Chareau ◽  
L Guiziou ◽  
...  
Keyword(s):  
Heat Transport ◽  
Magnetic Fluctuations ◽  
Cross Polarization ◽  
Electron Heat

Measurement of local, internal magnetic fluctuations via cross-polarization scattering in the DIII-D tokamak (invited)

2016 ◽  
Vol 87 (11) ◽  
pp. 11E601 ◽  
Author(s):  
K. Barada ◽  
T. L. Rhodes ◽  
N. A. Crocker ◽  
W. A. Peebles
Keyword(s):  
Magnetic Fluctuations ◽  
Cross Polarization

Cross-Polarization Scattering from Electromagnetic Plasma Waves in Ion Cyclotron Range of Frequencies

1995 ◽  
Vol 34 (Part 2, No. 11A) ◽  
pp. L1494-L1496 ◽  
Author(s):  
Atsushi Mase ◽  
Leonid G. Bruskin ◽  
Masashi Kobayashi ◽  
Naoyuki Oyama ◽  
Tokihiko Tokuzawa ◽  
...  
Keyword(s):  
Plasma Waves ◽  
Cross Polarization ◽  
Ion Cyclotron

scholarly journals Magnetic field fluctuations across the Earth’s bow shock

2001 ◽  
Vol 19 (3) ◽  
pp. 275-287 ◽  
Author(s):  
A. Czaykowska ◽  
T. M. Bauer ◽  
R. A. Treumann ◽  
W. Baumjohann
Keyword(s):  
Magnetic Field ◽  
Power Spectra ◽  
Plasma Waves ◽  
Bow Shock ◽  
Magnetic Fluctuations ◽  
Temperature Anisotropy ◽  
Left Hand ◽  
Significant Difference ◽  
Interplanetary Physics ◽  
Ion Cyclotron

Abstract. We present a statistical analysis of 132 dayside (LT 0700-1700) bow shock crossings of the AMPTE/IRM spacecraft. We perform a superposed epoch analysis of low frequency, magnetic power spectra some minutes up-stream and downstream of the bow shock. The events are devided into categories depending on the angle θBn between bow shock normal and interplanetary magnetic field, and on plasma-β. In the foreshock upstream of the quasi-parallel bow shock, the power of the magnetic fluctuations is roughly 1 order of magnitude larger (δB ~ 4 nT for frequencies 0.01–0.04 Hz) than upstream of the quasi-perpendicular shock. There is no significant difference in the magnetic power spectra upstream and downstream of the quasi-parallel bow shock; only at the shock itself, is the magnetic power enhanced by a factor of 4. This enhancement may be due to either an amplification of convecting upstream waves or to wave generation at the shock interface. On the contrary, downstream of the quasi-perpendicular shock, the magnetic wave activity is considerably higher than upstream. Down-stream of the quasi-perpendicular low-β bow shock, we find a dominance of the left-hand polarized component at frequencies just below the ion-cyclotron frequency, with amplitudes of about 3 nT. These waves are identified as ion-cyclotron waves, which grow in a low-β regime due to the proton temperature anisotropy. We find a strong correlation of this anisotropy with the intensity of the left-hand polarized component. Downstream of some nearly perpendicular (θBn ≈ 90°) high-β crossings, mirror waves are identified. However, there are also cases where the conditions for mirror modes are met downstream of the nearly perpendicular shock, but no mirror waves are observed.Key words. Interplanetary physics (plasma waves and turbulence) – Magnetospheric physics (magnetosheath; plasma waves and instabilities)

A Cross Polarization Suppressed Sequential Array with L-Probe Fed Rectangular Microstrip Antennas

2011 ◽  
Vol E94-B (9) ◽  
pp. 2653-2655
Author(s):  
Kazuki IKEDA ◽  
Keigo SATO ◽  
Ken-ichi KAGOSHIMA ◽  
Shigeki OBOTE ◽  
Atsushi TOMIKI ◽  
...  
Keyword(s):  
Microstrip Antennas ◽  
Cross Polarization

High-Pressure Homogenization Alters Physicochemical Properties and In Vitro Digestibility of Chinese Yam (Dioscorea Opposita Thunb.) Starch

2018 ◽  
Vol 18 (1) ◽  
pp. 10-15
Author(s):  
Wang Yi-Wei ◽  
He Yong-Zhao ◽  
An Feng-Ping ◽  
Huang Qun ◽  
Zeng Feng ◽  
...  
Keyword(s):  
High Pressure ◽  
Physicochemical Properties ◽  
Starch Content ◽  
In Vitro Digestibility ◽  
High Pressure Homogenization ◽  
Starch Granules ◽  
Cross Polarization ◽  
Chinese Yam ◽  
Crystal Type

In this study, Chinese yam starch-water suspension (8%) were subjected to high-pressure homogenization (HPH) at 100 MPa for increasing cycle numbers, and its effect of on the physicochemical properties of the starch was investigated. Results of the polarizing microscope observations showed that the starch granules were disrupted (i.e. greater breakdown value) after HPH treatment, followed by a decrease in cross polarization. After three HPH cycles, the crystallinity of starch decreased, while the crystal type remained unaltered. Meanwhile, the contents of rapidly digestible starch and slowly digestible starch were increased. On the contrary, resistant starch content was decreased. Our results indicate that HPH treatment resulted in reduction of starch crystallinity and increase of starch digestibility.

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