Anisotropic Bremsstrahlung Emission and the Form of Regularized Electron Flux Spectra in Solar Flares

2004 ◽  
Vol 613 (2) ◽  
pp. 1233-1240 ◽  
Author(s):  
Anna Maria Massone ◽  
A. Gordon Emslie ◽  
Eduard P. Kontar ◽  
Michele Piana ◽  
Marco Prato ◽  
...  
Keyword(s):  
Solar Flares ◽  
Electron Flux ◽  
Bremsstrahlung Emission

scholarly journals Electron‐Electron Bremsstrahlung Emission and the Inference of Electron Flux Spectra in Solar Flares

2007 ◽  
Vol 670 (1) ◽  
pp. 857-861 ◽  
Author(s):  
Eduard P. Kontar ◽  
A. Gordon Emslie ◽  
Anna Maria Massone ◽  
Michele Piana ◽  
John C. Brown ◽  
...  
Keyword(s):  
Solar Flares ◽  
Electron Flux ◽  
Electron Bremsstrahlung ◽  
Bremsstrahlung Emission

scholarly journals Electron Flux Spectral Imaging of Solar Flares through Regularized Analysis of Hard X‐Ray Source Visibilities

2007 ◽  
Vol 665 (1) ◽  
pp. 846-855 ◽  
Author(s):  
Michele Piana ◽  
Anna Maria Massone ◽  
G. J. Hurford ◽  
Marco Prato ◽  
A. Gordon Emslie ◽  
...  
Keyword(s):  
Solar Flares ◽  
Electron Flux ◽  
Spectral Imaging ◽  
X Ray

RHESSIIMAGING SURVEY OF γ-RAY BREMSSTRAHLUNG EMISSION IN SOLAR FLARES

2011 ◽  
Vol 728 (1) ◽  
pp. 22 ◽  
Author(s):  
S. Ishikawa ◽  
Säm Krucker ◽  
T. Takahashi ◽  
R. P. Lin
Keyword(s):  
Solar Flares ◽  
Bremsstrahlung Emission ◽  
Γ Ray

scholarly journals The Determination and Use of Mean Electron Flux Spectra in Solar Flares

2003 ◽  
Vol 595 (2) ◽  
pp. L115-L117 ◽  
Author(s):  
John C. Brown ◽  
A. Gordon Emslie ◽  
Eduard P. Kontar
Keyword(s):  
Solar Flares ◽  
Electron Flux

scholarly journals Return Current Instability in Flares

1989 ◽  
Vol 104 (2) ◽  
pp. 313-316
Author(s):  
D. Cromwell ◽  
P. McQuillan ◽  
J.C. Brown
Keyword(s):  
Solar Flares ◽  
Small Area ◽  
Thick Target ◽  
Target Electron ◽  
Return Current ◽  
Ion Acoustic Wave ◽  
X Ray ◽  
Acoustic Wave Generation ◽  
Bremsstrahlung Emission ◽  
Current Instability

AbstractWe consider the problem of ion-acoustic wave generation, and resultant anomalous Joule heating, by a return current driven unstable by a small-area thick-target electron beam in solar flares. We find that, contrary to the usual assumption, the hard X-ray bremsstrahlung emission may actually be enhanced in comparison to conventional thick-target models. This present paper is a summary of the work of Cromwell, McQuillan and Brown (1988).

ELECTRON FLUX MAPS OF SOLAR FLARES: A REGULARIZATION APPROACH TO RHESSI IMAGING SPECTROSCOPY

2007 ◽  
Author(s):  
ANNA MARIA MASSONE ◽  
MICHELE PIANA ◽  
MARCO PRATO ◽  
A. GORDON EMSLIE ◽  
GORDON J. HURFORD ◽  
...  
Keyword(s):  
Solar Flares ◽  
Electron Flux ◽  
Imaging Spectroscopy

Electron-Channelling Patterns: Principles and Techniques

1976 ◽  
Vol 34 ◽  
pp. 400-401
Author(s):  
David C. Joy
Keyword(s):  
Crystal Structure ◽  
Electron Flux ◽  
Lattice Structure ◽  
Incident Beam ◽  
Bloch Wave ◽  
Crystalline Solid ◽  
Angle Of Incidence ◽  
Electron Channelling ◽  
Regular Arrangement ◽  
Backscattered Signals

In a crystalline solid the regular arrangement of the lattice structure influences the interaction of the incident beam with the specimen, leading to changes in both the transmitted and backscattered signals when the angle of incidence of the beam to the specimen is changed. For the simplest case the electron flux inside the specimen can be visualized as the sum of two, standing wave distributions of electrons (Fig. 1). Bloch wave 1 is concentrated mainly between the atom rows and so only interacts weakly with them. It is therefore transmitted well and backscattered weakly. Bloch wave 2 is concentrated on the line of atom centers and is therefore transmitted poorly and backscattered strongly. The ratio of the excitation of wave 1 to wave 2 varies with the angle between the incident beam and the crystal structure.

Anisotropy of damage productions in electron irradiated molybdenum

1978 ◽  
Vol 36 (1) ◽  
pp. 354-355
Author(s):  
K. Izui ◽  
S. Furuno ◽  
H. Otsu ◽  
T. Nishida ◽  
H. Maeta
Keyword(s):  
Electron Flux ◽  
Threshold Energy ◽  
High Energy ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
Displacement Threshold ◽  
The Mean ◽  
Channeling Effect ◽  
Different Origins ◽  
Threshold Energies

Anisotropy of damage productions in crystals due to high energy electron bombardment are caused from two different origins. One is an anisotropic displacement threshold energy, and the other is an anisotropic distribution of electron flux near the atomic rows in crystals due to the electron channeling effect. By the n-beam dynamical calculations for germanium and molybdenum we have shown that electron flux at the atomic positions are from ∽4 to ∽7 times larger than the mean incident flux for the principal zone axis directions of incident 1 MeV electron beams, and concluded that such a locally increased electron flux results in an enhanced damage production. The present paper reports the experimental evidence for the enhanced damage production due to the locally increased electron flux and also the results of measurements of the displacement threshold energies for the <100>,<110> and <111> directions in molybdenum crystals by using a high voltage electron microscope.

Studies of the structure and dynamics of theDregion of the polar ionosphere during solar flares in April 2004

2006 ◽  
Vol 6 (2) ◽  
Author(s):  
V. D. Tereshchenko ◽  
E. B. Vasil'ev ◽  
O. F. Ogloblina ◽  
V. A. Tereshchenko ◽  
S. M. Chernyakov
Keyword(s):  
Solar Flares ◽  
Polar Ionosphere ◽  
Structure And Dynamics
Sign in / Sign up

Export Citation Format

Share Document