Experimental studies of shielding and irradiation effects at high energy accelerator facilities

Nakashima, Hiroshi; Sakamoto, Yukio; Iwamoto, Yosuke   ; Matsuda, Norihiro  ; Kasugai, Yoshimi  ; Nakane, Yoshihiro  ; Masukawa, Fumihiro  ; Mokhov, N.*; Leveling, A.*; Boehnlein, D.*; Vaziri, K.*; Sanami, Toshiya*; Matsumura, Hiroshi*; Hagiwara, Masayuki*; Iwase, Hiroshi*; Kinoshita, Norikazu*; Hirayama, Hideo*; Oishi, Koji*; Nakamura, Takashi*; Arakawa, Hiroyuki*; Shigyo, Nobuhiro*; Ishibashi, Kenji*; Yashima, Hiroshi*; Nakao, Noriaki*; Niita, Koji*

Experimental studies of shielding and radiation effects have been started using 120-GeV proton synchrotron at Fermi National Accelerator Laboratory (FNAL) under collaboration between FNAL and Japan. The first campaign of the experiment was carried out at the Pbar target station and Numi experimental station at FNAL, using antiproton and neutrino production targets irradiated by 120-GeV protons. The generated secondary particles passing through steel, concrete and rock were measured by activation methods as well as by other detectors such as scintillator with a veto counter, phoswich detector and a Bonner ball counter on trial. Preliminary experimental results are presented.