Coronal mass ejections (CMEs)‎ interaction and the acceleration of solar energetic particle (SEP)‎

الملخص EN

This paper presents the analysis of the 16 solar energetic particle (SEP) events have been observed during solar cycles 23 and 24 by using the Energetic and Relativistic Nuclei and Electron (ERNA) instruments on board the Solar and Heliospheric Observatory (SOHO).

This observation was covered the period 1998– 2012, with intensities of >10−3 cm−2·sr−1·s−1·MeV−1at energies of 1 MeV to 116 MeV.

The methods used in calculating the first injection of the SEPs associated with solar eruptions, such as CMEs and solar flare were successfully evaluated.

In addition, the characteristics of the eruptions that are capable of producing such SEPs and when and where the acceleration of the SEPs starts, also studied.

On other hand, the interaction of coronal mass ejections associated with the events and the effectiveness of this interaction on events were examined.

The analysis concluded that CME–CME interactions can be a key factor in particle acceleration and transport.It is found thatthere are two identified types of interactions that affect particle injection, distinguish the different interactions according to the intensity-time profile as follows: 1.

In the CME–CME interactions happen at the beginning of the event.

2.

There are distinct events of the interactions between (CME1) and new particles (SEP2) which result from (CME3).