PoS - Proceedings of Science
Volume 301 - 35th International Cosmic Ray Conference (ICRC2017) - Session Solar & Heliospheric. SH-Transient solar phenomena (SEP, GLE, Forbush decreases)
Proton Acceleration by Very Impulsive Flare on June 3, 2012
K. Kamiya*, K. Koga, S. Masada, H. Matsumoto, Y. Muraki, T. Obara, O. Okudaira, Y. Tanaka, S. Shibata and T. Goka
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Pre-published on: August 16, 2017
Published on: August 03, 2018
On June 3, 2012, a very impulsive solar flare was observed by the GOES, RHESSI and FERMI- LAT satellites. The intensity of the flare was M3.3. The hard X-ray intensity (> 100 keV) rose ≥ 1000 times within one minute and then decayed immediately to the background level (in less than one minute). It was an extremely impulsive flare. By chance, the SEDA-FIB solar neutron detector onboard the International Space Station detected a 5.1σ enhancement due to solar neutrons. Therefore, it provided a good opportunity to investigate the mechanism of instantaneous proton acceleration to a few GeV. Based on the results of a new Monte Carlo calculation, we will show a reasonable proton acceleration model for the June 3, 2012 event. We also reexamined another very impulsive flare observed on June 10, 2010.
DOI: https://doi.org/10.22323/1.301.0115
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