Figure 14: (a) The angular distribution of neutrons detected by the FIB sensor during 06 : 20 UT and 06 : 41 UT on June 7, 2011. Total number of neutrons detected above duration was 240. (b) The histogram of (a) is divided by the solid angle. The vertcical axis represents . A sharp peak is recognized at the solar direction, while beyond 10 degrees, almost flat distribution is seen.