Author/Authors :
Fukuda ، نويسنده , , T. and Hasegawa، نويسنده , , T. and Hashimoto، نويسنده , , O. and Higashi، نويسنده , , A. and Homma، نويسنده , , S. and Kitami، نويسنده , , T. and Matsuyama، نويسنده , , Y. and Miyachi، نويسنده , , T. and Morimoto، نويسنده , , T. and Nagae، نويسنده , , T. and Omata، نويسنده , , K. and Sekimoto، نويسنده , , M. and Shibata، نويسنده , , T. and Sakaguchi، نويسنده , , H. and Takahashi، نويسنده , , T. and Aoki، نويسنده , , K. and Doi، نويسنده , , Y. and Kondo، نويسنده , , Y. and Makida، نويسنده , , Y. and Nomachi، نويسنده , , M. and Noumi، نويسنده , , H. and Sasaki، نويسنده , , O. and Shintomi، نويسنده , , T. and Bhang، نويسنده , , H. and Park، نويسنده , , H. Y. Youn، نويسنده , , M. and Yu، نويسنده , , H. and Gavrilov، نويسنده , , Y. and Ajimura، نويسنده , , S. and Kishimoto، نويسنده , , T. and Ohkusu، نويسنده , , A. and Shinkai، نويسنده , , N. and Maeda، نويسنده , , K. and Sawafta، نويسنده , , R.، نويسنده ,
Abstract :
A superconducting kaon spectrometer has been installed in the north experimental hall of the KEK 12-GeV proton synchrotron. The spectrometer was designed to serve for nuclear physics experiments with meson beams in the 1 GeV/c region, particular emphasis being laid on study of Λ-hypernuclei via (π+, K+) reactions. In order to obtain Λ-hypernuclear data with better statistics and energy resolution, it was designed to have a good momentum resolution of 0.1% FWHM and a large acceptance of 100 msr. It consists of a large superconducting dipole magnet, tracking chambers, and trigger counters that can efficiently select kaons from large background of pions and protons. The overall energy resolution for scattering is realized together with a beam-line spectrometer in the K6 beam line, the momentum resolution of which was also designed to be better than 0.1% FWHM. A good energy resolution of better than 2 MeV FWHM has been confirmed in π−-12C elastic scattering and in the (π+,K+) reaction on 12C.
