Neutron Spectroscopy in Perpendicular Neutral Beam Injection Deuterium Plasmas Using Newly Developed Compact Neutron Emission Spectrometers. - Siriyaporn Sangaroon; Kunihiro Ogawa; Mitsutaka Isobe; Longyong Liao; Guoqiang Zhong 004; Apiwat Wisitsorasak; Eiji Takada; Makoto Inami Kobayashi; Nopporn Poolyarat; Sadayoshi Murakami; Ryohsuke Seki; Hideo Nuga; et al. (IEEE Trans. Instrum. Meas., 2024)