  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.
