New Solar Neutron Detector and Large Solar Flare Events of June 4th and 6th, 1991.

AbstractThe experiment SONG (SOlar Neutron and Gamma rays) for the low altitude satellite CORONAS-I is described. The instrument is capable to provide gamma-ray line and continuum detection in the energy range 0.1 – 100 MeV as well as detection of neutrons with energies above 30 MeV. As a by-product, the electrons in the range 11 – 108 MeV will be measured too. The pulse shape discrimination technique (PSD) is used.

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Measurement by FIB on the ISS: Two Emissions of Solar Neutrons Detected?

Advances in Astronomy ◽

10.1155/2012/379304 ◽

2012 ◽

Vol 2012 ◽

pp. 1-14 ◽

Cited By ~ 9

Author(s):

Y. Muraki ◽

K. Koga ◽

T. Goka ◽

H. Matsumoto ◽

T. Obara ◽

...

Keyword(s):

Solar Flares ◽

Neutron Detector ◽

Space Shuttle ◽

Space Station ◽

Energy Spectra ◽

Arrival Direction ◽

Directional Information ◽

Solar Neutron ◽

New Type ◽

First Time

A new type of solar neutron detector (FIB) was launched on board the Space Shuttle Endeavour on July 16, 2009, and began collecting data at the International Space Station (ISS) on August 25, 2009. This paper summarizes the three years of observations obtained by the solar neutron detector FIB until the end of July 2012. The solar neutron detector FIB can determine both the energy and arrival direction of neutrons. We measured the energy spectra of background neutrons over the South Atlantic Anomaly (SAA) region and elsewhere and found the typical trigger rates to be 20 and 0.22 counts/sec, respectively. It is possible to identify solar neutrons to within a level of 0.028 counts/sec, provided that directional information is applied. Solar neutrons were possibly observed in association with the M-class solar flares that occurred on March 7 (M3.7) and June 7 (M2.5) of 2011. This marked the first time that neutrons had been observed in M-class solar flares. A possible interpretation of the production process is provided.

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Solar neutron observations and their relation to solar flare acceleration problems

Solar Physics ◽

10.1007/bf00148591 ◽

1988 ◽

Vol 118 (1-2) ◽

pp. 137-154 ◽

Cited By ~ 19

Author(s):

E. L. Chupp

Keyword(s):

Solar Flare ◽

Solar Neutron

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THE GIANT FORBUSH DECREASE IN OCTOBER/NOVEMBER 2003: DATA ANALYSIS FOR THE SOLAR NEUTRON DETECTOR AT GORNERGRAT

International Journal of Modern Physics A ◽

10.1142/s0217751x05029800 ◽

2005 ◽

Vol 20 (29) ◽

pp. 6684-6686

Author(s):

E. O. FLÜCKIGER ◽

R. BÜTIKOFER ◽

L. DESORGHER ◽

M. R. MOSER ◽

Y. MURAKI ◽

...

Keyword(s):

Monte Carlo ◽

Initial Phase ◽

Neutron Detector ◽

High Speed ◽

Forbush Decrease ◽

Cosmic Ray ◽

Solar Neutron ◽

The Earth ◽

Worldwide Network ◽

Mass Ejection

In connection with the X17.2 flare on October 28, 2003, a coronal mass ejection was emitted at a high speed directly towards the Earth and caused a dramatic Forbush decrease (Fd) in the count rates of the worldwide network of ground-based cosmic ray detectors. During the initial phase of this Fd the ratios of the two Gornergrat solar neutron telescope particle channels (charged + neutral) and neutral show a step-like increase lasting about three days. This phenomenon is investigated based on Monte Carlo simulations of the cosmic ray cascades in the Earth's atmosphere and of the interactions of the secondary cosmic ray particles with the detector.

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

Annales Geophysicae ◽

10.1007/s00585-997-0375-9 ◽

1997 ◽

Vol 15 (4) ◽

pp. 375-386 ◽

Cited By ~ 17

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.

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