摘要
Ⅰ. INTRODUCTION Owing to the rapid decrease of primary cosmic ray intensity with increasing energy, the detectors for recording super-high energy events must have very large acceptance. To study the super-high energy hadronic interaction at 1015—1017 eV, a large emulsion chamber with 150 m2 of sensitive area and one year’s sensitive time in one experimental period has been built on the top of Mt. Kanbala （5500 m a. s. 1.）
