Measurement of high-energy solar neutrons with SEDA-FIB onboard the ISS

Y. Muraki; K. Koga; O. Okudaira; S. Shibata; T. Goka; H. Matsumoto; T. Obara; T. Yamamoto

Measurement of high-energy solar neutrons with SEDA-FIB onboard the ISS

Y. Muraki, K. Koga, O. Okudaira, S. Shibata, T. Goka, H. Matsumoto, T. Obara, T. Yamamoto

SCI - Planetary Plasma and Atmospheric Research Center (PPARC)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

A new type of solar neutron detector (SEDA-FIB) was launched on board the Space Shuttle Endeavor on July 16 2009, and began collecting data at the International Space Station (ISS) on August 25 2009. This paper summarizes four years of observations with the solar neutron detector SEDA-FIB (Space Environment Data Acquisition using the FIBer detector). The solar neutron detector FIB can determine both the energy and arrival direction of solar neutrons. In this paper, we first present the angular distribution of neutron induced protons obtained in Monte Carlo simulations. The results are compared with the experimental results. Then we provide the angular distribution of background neutrons during one full orbit of the ISS (90 minutes). Next, the angular distribution of neutrons during the flare onset time from 20:02 to 20:10 UT on March 7 2011 is presented. It is compared with the distribution when a solar flare is not occurring. Observed solar neutrons possibly originated from the M-class solar flares that occurred on March 7 (M3.7), June 7 (M2.5), September 24 (M3.0) (weak signal) and November 3 (X1.9) of 2011 and January 23 of 2012 (M8.7). This marked the first time that neutrons have been observed from M-class solar flares. A possible interpretation of the neutron production process will be also provided.

Original language	English
Title of host publication	Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
Publisher	Sociedade Brasileira de Fisica
ISBN (Electronic)	9788589064293
Publication status	Published - 2013 Jan 1
Event	33rd International Cosmic Rays Conference, ICRC 2013 - Rio de Janeiro, Brazil Duration: 2013 Jul 2 → 2013 Jul 9

Publication series

Name	Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
Volume	2013-October

Other

Other	33rd International Cosmic Rays Conference, ICRC 2013
Country/Territory	Brazil
City	Rio de Janeiro
Period	13/7/2 → 13/7/9

Keywords

Proton acceleration
SEP
Solar comic rays
Solar neutrons

ASJC Scopus subject areas

Nuclear and High Energy Physics

Cite this

Muraki, Y., Koga, K., Okudaira, O., Shibata, S., Goka, T., Matsumoto, H., Obara, T., & Yamamoto, T. (2013). Measurement of high-energy solar neutrons with SEDA-FIB onboard the ISS. In Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013 (Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013; Vol. 2013-October). Sociedade Brasileira de Fisica.

Measurement of high-energy solar neutrons with SEDA-FIB onboard the ISS. / Muraki, Y.; Koga, K.; Okudaira, O. et al.

Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013. Sociedade Brasileira de Fisica, 2013. (Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013; Vol. 2013-October).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Muraki, Y, Koga, K, Okudaira, O, Shibata, S, Goka, T, Matsumoto, H, Obara, T & Yamamoto, T 2013, Measurement of high-energy solar neutrons with SEDA-FIB onboard the ISS. in Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013. Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013, vol. 2013-October, Sociedade Brasileira de Fisica, 33rd International Cosmic Rays Conference, ICRC 2013, Rio de Janeiro, Brazil, 13/7/2.

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AB - A new type of solar neutron detector (SEDA-FIB) was launched on board the Space Shuttle Endeavor on July 16 2009, and began collecting data at the International Space Station (ISS) on August 25 2009. This paper summarizes four years of observations with the solar neutron detector SEDA-FIB (Space Environment Data Acquisition using the FIBer detector). The solar neutron detector FIB can determine both the energy and arrival direction of solar neutrons. In this paper, we first present the angular distribution of neutron induced protons obtained in Monte Carlo simulations. The results are compared with the experimental results. Then we provide the angular distribution of background neutrons during one full orbit of the ISS (90 minutes). Next, the angular distribution of neutrons during the flare onset time from 20:02 to 20:10 UT on March 7 2011 is presented. It is compared with the distribution when a solar flare is not occurring. Observed solar neutrons possibly originated from the M-class solar flares that occurred on March 7 (M3.7), June 7 (M2.5), September 24 (M3.0) (weak signal) and November 3 (X1.9) of 2011 and January 23 of 2012 (M8.7). This marked the first time that neutrons have been observed from M-class solar flares. A possible interpretation of the neutron production process will be also provided.

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Measurement of high-energy solar neutrons with SEDA-FIB onboard the ISS

Abstract

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Keywords

ASJC Scopus subject areas

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