Reconfigurable low-power wideband receiver for cosmic noise radiation absorption measurements

2008 ◽  
Author(s):  
G. Dekoulis
Keyword(s):  
Low Power ◽  
Radiation Absorption ◽  
Noise Radiation ◽  
Cosmic Noise ◽  
Absorption Measurements

Studies of Radio-Wave Absorption Features at a Subauroral Latitude

1971 ◽  
Vol 49 (11) ◽  
pp. 1411-1418
Author(s):  
M. A. Abdu ◽  
E. L. Vogan
Keyword(s):  
Radio Wave ◽  
The South ◽  
Wave Absorption ◽  
The North ◽  
Noise Absorption ◽  
Radio Wave Absorption ◽  
Cosmic Noise ◽  
Absorption Features ◽  
Absorption Measurements

Cosmic noise absorption measurements at 30 MHz were made simultaneously on two antennas having different beam widths at London, Ontario(53 °N geomagnetic, L = 3.1), a subauroral zone station. The data show that absorption is caused by regions of ionization which exhibit marked spatial non-uniformity within the antenna beams, and which have horizontal extensions limited more toward the south than toward the north of the station. The measurements also indicate the presence of auroral ionization at all times of the day over London.

High-resolution analytical electron microscopy (HRAEM) study of LaCo5 intermetallic catalysts

1986 ◽  
Vol 44 ◽  
pp. 768-769
Author(s):  
Z. L. Wang ◽  
C. Colliex ◽  
V. Paul-Boncour ◽  
A. Percheron-Guegan
Keyword(s):  
Electron Microscopy ◽  
Data Analysis ◽  
High Resolution ◽  
Synchrotron Radiation ◽  
Analytical Electron Microscopy ◽  
Radiation Absorption ◽  
Microscopic Structure ◽  
Analytical Electron ◽  
Metal Support ◽  
Absorption Measurements

Intermetal1ic compounds, such as LaCo5, have been used as active and selective catalysts in chemical reaction involving (CO,H2) mixtures. The general understanding regarding these catalysts is that the observed activation is associated with a partial transformation of the intermetallic component into a metal-support system. The macroscopic study of LaCo3 by use of synchrotron radiation absorption measurements (EXAFS and XANES data analysis) largely support this hypothesis. In this work, the microscopic structure of these catalysts has been studied by HRAEM.

ABSORPTION MEASUREMENTS DURING THE SOLAR ECLIPSE OF JULY 20, 1963

1964 ◽  
Vol 42 (7) ◽  
pp. 1382-1386 ◽  
Author(s):  
E. L. Vogan
Keyword(s):  
Solar Eclipse ◽  
Noise Level ◽  
Total Solar Eclipse ◽  
Cosmic Noise ◽  
Absorption Measurements

Riometer data obtained from several Canadian stations during the total solar eclipse of July 20, 1963, are presented and discussed. A small increase in cosmic noise level, amounting to about 0.25 dB at 30 Mc/s, was observed at Ottawa, Cape Jones, and Churchill.

Absorption coefficients of a hydrogen plasma for laser radiation

1974 ◽  
Vol 11 (1) ◽  
pp. 111-129 ◽  
Author(s):  
James R. Stallcop
Keyword(s):  
Laser Radiation ◽  
Absorption Coefficient ◽  
Hydrogen Plasma ◽  
Radiation Absorption ◽  
Graphical Form ◽  
Wide Range ◽  
Plasma Absorption ◽  
Common Laboratory ◽  
Absorption Measurements

The formalism for the calculation of the absorption of radiation by a hydrogen plasma at common laboratory conditions is summarized. The hydrogen plasma absorption coefficient for laser radiation has been computed for a wide range of electron densities (1015- 1018 cm-3) and temperatures (10 000–40 000 °K). The results of this computation are presented in a graphical form that permits a determination of the absorption coefficient for the following laser wavelengths: 0.176, 0.325, 0.337, 0.442, 0.488, 0.51, 0.633, 0.694, 1.06, 1.15, 2.36, 3.39, 5.40 and 10.6 Μm. The application of these results and laser radiation absorption measurements to plasma diagnostics is discussed briefly.

scholarly journals Spectral type of auroral precipitating electrons estimated from optical and cosmic noise absorption measurements

2006 ◽  
Vol 111 (A11) ◽  
Author(s):  
Y.-M. Tanaka ◽  
M. Kubota ◽  
M. Ishii ◽  
Y. Monzen ◽  
Y. Murayama ◽  
...  
Keyword(s):  
Spectral Type ◽  
Noise Absorption ◽  
Cosmic Noise ◽  
Absorption Measurements
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