Toho University (1) Microscope Stages Two Nikon L-Mic scanning microscopes equipped with New Track Selector (NTS) and Ultra Track Selector (UTS) (2) Present Activities Analysis of test beam exposures SPring-8 (0.25GeV, 0.5 GeV, 1.0GeV, 2.0GeV electrons) electron ID, Energy Estimation in ECC KEK (0.4GeV/c – 4.0GeV/c positive or negative pions)  Momentum measurement by Multiple Coulomb Scattering in ECC  dE/dx measurement in ECC NIRS (a few hundred MeV/u C and other nuclei)  general study of emulsion techniques including an emulsion spectrometer Photo mask for grid printing Distortion properties, corrections for precise position measurements (3) Plan Based on the above experiences, we would like to analyze special events. C. Fukushima, M. Kimura, S. Ogawa, H. Shibuya Dec 07, 2006 Emulsion Workshop

Study of compact emulsion spectrometer for identification of neutrino/anti-neutrino interaction Ehime Univ. Chika Fukushima Toho University Toho Univ.,Aichi Univ. of Education A,Kobe Univ. B Satoru Ogawa, Mitsuhiro Kimura, Hiroshi Shibuya, Koichi Kodama A, Toshio Hara B

B 248m m depth 244mm N ｄ FeB compact permanent magnet magnetic field １ Tesla (1.057[T] at the center) 1.0T Z[mm] distribution of magnetic field along the beam direction Good point using permanent magnet is: ☆ compact （ no need space ） ☆ no electric power is needed 0% -1% 1% 2% -2% relative error distribution of magnetic field in middle of magnet(z=0) １ Tesla permanent magnet