Neutron monitor observations of high-energy solar particles during the new cycle

Solar Physics ◽  
1967 ◽  
Vol 2 (4) ◽  
Author(s):  
G.A. Baird ◽  
G.G. Bell ◽  
S.P. Duggal ◽  
M.A. Pomerantz
Keyword(s):  
Neutron Monitor ◽  
High Energy ◽  
Solar Particles

scholarly journals GLE # 67 Event on 2 November 2003: An Analysis of the Spectral and Anisotropy Characteristics Using Verified Yield Function and Detrended Neutron Monitor Data

Solar Physics ◽  
2021 ◽  
Vol 296 (5) ◽  
Author(s):  
Alexander L. Mishev ◽  
Sergey A. Koldobskiy ◽  
Leon G. Kocharov ◽  
Ilya G. Usoskin
Keyword(s):  
Neutron Monitor ◽  
Dynamical Evolution ◽  
Ground Level ◽  
High Energy ◽  
Yield Function ◽  
Angle Distribution ◽  
Ground Level Enhancement ◽  
Solar Particles ◽  
Monitor Data

AbstractDuring Solar Cycle 23 16 ground-level enhancement events were registered by the global neutron monitor network. In this work we focus on the period with increased solar activity during late October – early November 2003 producing a sequence of three events, specifically on ground-level enhancement GLE 67 on 2 November 2003. On the basis of an analysis of neutron monitor and space-borne data we derived the spectra and pitch-angle distribution of high-energy solar particles with their dynamical evolution throughout the event. According to our analysis, the best fit of the spectral and angular properties of solar particles was obtained by a modified power-law rigidity spectrum and a double Gaussian, respectively. The derived angular distribution is consistent with the observations where an early count rate increase at Oulu neutron monitor with asymptotic viewing direction in the anti-Sun direction was registered. The quality of the fit and model constraints were assessed by a forward modeling. The event integrated particle fluence was derived using two different methods. The derived results are briefly discussed.

scholarly journals Common overabundance of $\mathsf{^3}$He in high-energy solar particles

2003 ◽  
Vol 408 (1) ◽  
pp. L1-L4 ◽  
Author(s):  
J. Torsti ◽  
J. Laivola ◽  
L. Kocharov
Keyword(s):  
High Energy ◽  
Solar Particles

Identification of high energy solar particle signals on the Mexico City neutron monitor database

2012 ◽  
Vol 49 (11) ◽  
pp. 1593-1597 ◽  
Author(s):  
Bernardo Vargas Cárdenas ◽  
José F. Valdés-Galicia
Keyword(s):  
Mexico City ◽  
Neutron Monitor ◽  
High Energy ◽  
Solar Particle

High-energy solar particles and human exploration

Space Weather ◽  
2005 ◽  
Vol 3 (5) ◽  
pp. n/a-n/a ◽  
Author(s):  
Louis J. Lanzerotti
Keyword(s):  
High Energy ◽  
Solar Particles ◽  
Human Exploration

scholarly journals The World Neutron Monitor Network as a tool for the study of solar neutrons

1997 ◽  
Vol 15 (4) ◽  
pp. 375-386 ◽  
Author(s):  
I. G. Usoskin ◽  
G. A. Kovaltsov ◽  
H. Kananen ◽  
P. Tanskanen
Keyword(s):  
Solar Flare ◽  
Neutron Monitor ◽  
Event Detection ◽  
High Energy ◽  
The Sun ◽  
Estimation Technique ◽  
Solar Neutron ◽  
The World

Abstract. The use of the World Neutron Monitor Network to detect high-energy solar neutrons is discussed in detail. It is shown that the existing network can be used for the routine detection of intense sporadic solar-neutron events whenever they occur. A technique is suggested involving the weighted summation of responses of separate monitors to solar neutrons. It is demonstrated that the use of this method improves the significance of solar-neutron event detection. Different results of the simulation of the neutron-monitor sensitivity to solar neutrons have been tested with respect to their application for practical use. It is shown that the total number of neutrons with energy above 300 MeV injected from the Sun during a solar flare can be estimated directly from the time-integrated neutron-monitor response to solar neutrons without any model assumptions. The estimation technique has been developed.

scholarly journals PAMELA’S MEASUREMENTS OF MAGNETOSPHERIC EFFECTS ON HIGH-ENERGY SOLAR PARTICLES

2015 ◽  
Vol 801 (1) ◽  
pp. L3 ◽  
Author(s):  
O. Adriani ◽  
G. C. Barbarino ◽  
G. A. Bazilevskaya ◽  
R. Bellotti ◽  
M. Boezio ◽  
...  
Keyword(s):  
High Energy ◽  
Solar Particles

scholarly journals The burst of solar and geomagnetic activity in August–September 2005

2009 ◽  
Vol 27 (3) ◽  
pp. 1019-1026 ◽  
Author(s):  
A. Papaioannou ◽  
H. Mavromichalaki ◽  
E. Eroshenko ◽  
A. Belov ◽  
V. Oleneva
Keyword(s):  
Solar Activity ◽  
Solar Cycle ◽  
Geomagnetic Activity ◽  
Neutron Monitor ◽  
Cosmic Ray ◽  
High Energy ◽  
X Ray ◽  
Cycle Minimum ◽  
Short Period ◽  
Ray Density

Abstract. During the August–September 2005 burst of solar activity, close to the current solar cycle minimum, a significant number of powerful X-ray flares were recorded, among which was the outstanding X17.0 flare of 7 September 2005. Within a relatively short period (from 22 August to 17 September) two severe magnetic storms were also recorded as well as several Forbush effects. These events are studied in this work, using hourly mean variations of cosmic ray density and anisotropy, derived from data of the neutron monitor network. During these Forbush effects the behavior of high energy cosmic ray characteristics (density and anisotropy) is analyzed together with interplanetary disturbances and their solar sources, and is compared to the variations observed in geomagnetic activity. A big and long lasting (~6 h) cosmic ray pre-decrease (~2%) is defined before the shock arrival on 15 September 2005. The calculated cosmic ray gradients for September 2005 are also discussed.

scholarly journals Inferred charge states of high energy solar particles from the solar isotope spectrometer on ACE

1999 ◽  
Vol 26 (2) ◽  
pp. 149-152 ◽  
Author(s):  
C. M. S. Cohen ◽  
A. C. Cummings ◽  
R. A. Leske ◽  
R. A. Mewaldt ◽  
E. C. Stone ◽  
...  
Keyword(s):  
High Energy ◽  
Solar Particles ◽  
Charge States
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