[en] By computing the spin as well as orbit motion of each particle, it is shown that acceleration of polarized protons is feasible if a rapid change is made in νsub(z) at four medium strong resonances out of eleven in total. The remaining seven resonances are so strong that at each of them, the polarization only changes the sign without a serious loss. The final polarization at 12 GeV will be higher than 83% of the initial one at the injection energy of 0.5 GeV, if the vertical beam radius is 25 mm at the injection. This estimation includes a polarization loss of 7% due to the influence of synchrotron oscillation. (author)

[en] The space charge limit of the 500 MeV booster synchrotron (2.6 x 10¹² ppp, 20 Hz) may be reached by 110 turn injection of 10 mA H^- beam from the linac. The charge exchange injection of H^- beam may give a higher phase space density in the synchrotron beam than the regular proton injection. The feasibility of constructing the injection system is shown for the H^- ion source (30 mA), the preaccelerator, the linac (10 mA), the injection optics and the charge exchange stripper. (auth.)

[en] Acceleration of polarized proton beam is studied by computing the spin as well as orbit motion step by step throughout the whole acceleration period. Acceleration is feasible without or with a νsub(z)-jump technique. Without a νsub(z)-jump technique, the vertical polarization will change the sign with a small loss (2%) at 239 MeV, the only one intrinsic resonance, if the vertical beam radius is 10 mm at the resonance. Though synchrotron oscillation may cause an additional polarization loss, it will be much less than 10%. If a νsub(z)-jump technique is employed, the initial polarization is maintained including the sign. The depolarization will be as small as 6% by pulsing 10 cm thick quadrupole magnets added on both ends of each straight section up to 0.1 kGauss/cm within 3 μsec. In this case the influence of synchrotron oscillation is negligibly small. (author)

[en] After a short description about the principle of duoplasmatron, experimental results on a test bench are given. Effects of various source parameters (filament current, arc current, magnetic field, H₂ gas pressure, distances between electrodes, anode aperture, etc.) and extraction parameters (plasma cup contour, mesh, cup length, biasing cup wall, extraction voltage and distance, cup of magnetic material, additional magnetic field in the cup, etc.) were examined. Improvements to be made in future are also discussed. (auth.)

No abstract available

[en] This issue is the collection of the paper presented at the title meeting. The 36 of the presented papers are indexed individually. (J.P.N.)

[en] A possibility for acceleration of deuterons in the KEK accelerator is presented with some modifications required to the present machine. Deuteron beam of an intensity as high as 350 mA was obtained in the present duoplasmatron ion source. The emittance and acceptane of the 20-MeV proton linac are calculated for deuterons. A modification in the field distribution by means of tuners is considered to save the rf power and to improve the longitudinal emittance. Acceleration in the booster and main synchrotrons as well as in the 180-GeV intersecting storage ring proposed for a KEK future project are discussed. Intensity of the obtainable neutron beam is also estimated. (auth.)

No abstract available

[en] DIRAC experiment is under way at CERN-PS with an aim of testing the predictions of the chiral perturbation theory of QCD for the S-wave ππ-scattering length (actually Δ=a₀⁰-a₂⁰, where a_I^L=ππ-scattering length of orbital angular momentum L and isospin I). The target accuracy of the measurement is 5%, which is the accuracy of the theoretical prediction at present. After a brief review for the theoretical and experimental values for the scattering lengths, the experimental method to derive the ππ-scattering length from measurement of the lifetime of π⁺π^--atoms, the estimated ambiguity for the scattering lengths, etc. are described. A few discussions are also given including alternate methods to obtain the scattering lengths from measurement of the decay of π⁺π^--atoms. (author)

[en] A brief introduction to scintillators is given: After explaining different terminology such as luminescence, fluorescence, scintillation, phosphorescence, etc. the basic mechanism of scintillation is given. Then scintillation efficiency, and main characteristics of scintillators including quenching, decay, particle discrimination and radiation hardness are described. Finally the differences between inorganic and organic scintillators are summarized. (author)