scholarly journals Search for Evidence of Alpha‐Particle Beams during a Solar Flare Observed by the Coronal Diagnostic Spectrometer aboard theSolar and Heliospheric Observatory

2001 ◽  
Vol 555 (1) ◽  
pp. 435-439 ◽  
Author(s):  
Jeffrey W. Brosius
Keyword(s):  
Solar Flare ◽  
Alpha Particle ◽  
Particle Beams ◽  
Heliospheric Observatory ◽  
Coronal Diagnostic Spectrometer

The Coronal Diagnostic Spectrometer for the Solar and Heliospheric Observatory: experiment description and calibration

Metrologia ◽  
1995 ◽  
Vol 32 (6) ◽  
pp. 647-652 ◽  
Author(s):  
R A Harrison ◽  
B J Kent ◽  
E C Sawyer ◽  
J Hollandt ◽  
M K hne ◽  
...  
Keyword(s):  
Heliospheric Observatory ◽  
Experiment Description ◽  
Coronal Diagnostic Spectrometer

Interaction of Alpha Particle Beams with Fe-Based and FeNi-Based Glassy Ferromagnets

1995 ◽  
Vol 396 ◽  
Author(s):  
Monica Sorescu ◽  
D. Barb
Keyword(s):  
Alpha Particle ◽  
Crystallization Process ◽  
Morphological Changes ◽  
Particle Beam ◽  
Particle Beams ◽  
Magnetic Texture ◽  
Ferromagnetic Alloys ◽  
Sample Composition ◽  
Radiation Induced ◽  
Amorphous Magnets

AbstractSamples of Fe78B13Si9 and Fe40Ni38Mo4B18 metallic glasses were irradiated with alpha particle beams (W=2.8 MeV) using radiation doses of 1016 and 1017 cm-2. Irradiation-induced effects on the magnetic texture and phase composition of alloy samples were studied by Mössbauer spectroscopy. Related morphological changes and resultant crystalline precipitates were characterized by scanning electron microscopy. The evolution of phases and microstructure during the radiation-induced amorphous-to-crystalline transformation was found to depend on the particle flux and sample composition. The lowest radiation dose employed was found to be more effective in inducing amorphous-to-crystalline transformations in both ferromagnetic alloys studied. In addition, the FeNi-based amorphous system investigated was found to be more stable than the Fe-based metallic glass, exposed to the same particle-beam irradiation conditions. By stimulating unconventional pathways for the crystallization process, the interaction of alpha particle beams with glassy ferromagnets offers unique opportunities to understand the fundamentals of nucleation and growth in amorphous magnets.

DESIGN OF AN ULTRA COMPACT CYCLOTRON FOR PARTICLE INDUCED X-RAY EMISSION

1993 ◽  
Vol 03 (04) ◽  
pp. 329-333 ◽  
Author(s):  
S. WAKASA ◽  
K. FUKUDA ◽  
T. TAKAGI ◽  
N. NAKANISHI
Keyword(s):  
Alpha Particle ◽  
Particle Beams ◽  
Rutherford Back Scattering ◽  
Constant Energy ◽  
X Ray ◽  
Compact Cyclotron ◽  
Back Scattering

An ultra compact cyclotron was constructed for Particle Induced X-ray Emission (PIXE) and Rutherford Back Scattering (RBS) experiments. The cyclotron accelerates proton and alpha-particle beams to a constant energy of 3 MeV. The size of the magnet is 85 cm ×85 cm ×60 cm . Characteristics of the cyclotron are presented.

Alpha Particle Beam Interactions with Fe-Based and FeCo-Based Amorphous Magnets

1996 ◽  
Vol 438 ◽  
Author(s):  
Monica Sorescu ◽  
D. Barb
Keyword(s):  
Alpha Particle ◽  
Metallic Glasses ◽  
Conversion Electron ◽  
Particle Flux ◽  
Particle Beam ◽  
Radiation Doses ◽  
Particle Beams ◽  
Sample Composition ◽  
Radiation Induced ◽  
Amorphous Magnets

AbstractSamples of Fe78B13Si1 and Fe66Co18B15Si1 metallic glasses were irradiated with alpha particle beams (W=2.8 MeV) using radiation doses of 1016 and 1017 cm2. Irradiation-induced effects on the magnetic and structural properties of alloy samples were studied by transmission and conversion electron Mbssbauer spectroscopy. The evolution of phases and microstructure during the radiation-induced amorphous-to-crystalline transformation was found to depend on the particle flux and sample composition. Differences between bulk and surface irradiation behaviors were demonstrated.

scholarly journals Rapid Electrochemical Detection of Radiolysis Products in an Aqueous Solution Exposed to Alpha Particle Beams

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
J. E. Liedhegner ◽  
W. Jennings ◽  
J. Wainright
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Steady State ◽  
Alpha Particle ◽  
Atmospheric Pressure ◽  
Electrochemical Cell ◽  
Ion Beam ◽  
Minimal Energy ◽  
Particle Beams ◽  
Radiolysis Products

An electrochemical cell has been developed that allows for the rapid and exhaustive detection of oxygen and/or hydrogen peroxide produced during the radiolysis of aqueous solutions by alpha particle or proton beams. Short, 10–100 s, exposures were sufficient to yield steady-state electrochemical currents proportional to the radiolysisG-factor. The use of thin SiC windows provided a robust means of separating the vacuum environment of the ion-beam accelerator from the aqueous solution at atmospheric pressure with minimal energy loss.

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