Author/Authors :
Maruyama، نويسنده , , K. and Garino، نويسنده , , G. and Kato، نويسنده , , S. and Koike، نويسنده , , M. and Murata، نويسنده , , Y. and Mutou، نويسنده , , M. and Niki، نويسنده , , K. and Yoshida، نويسنده , , K. and Asai، نويسنده , , M. and Asano، نويسنده , , Shyam S. and Endo، نويسنده , , I. and Endo، نويسنده , , S. and Harada، نويسنده , , M. and Kasai، نويسنده , , S. and Miyamoto، نويسنده , , K. and Sumi، نويسنده , , Y. and Sasaki، نويسنده , , A. and Hossain، نويسنده , , K.، نويسنده ,
Abstract :
The study of photoreactions on light nuclei with the TAGX spectrometer started in 1987 using the 20% duty-cycle tagged-photon beam at the 1.3-GeV Tokyo electron synchrotron. TAGX is comprised of a π-sr magnetic spectrometer for detection of charged pions, kaons, and protons and a 0.85-sr time-of-flight spectrometer for neutrons. It has served in the past eight years as a unique medium-energy-resolution multi-particle spectrometer for coincidence experiments to detect such final states as pn, pp, π+ π−, ppn, pp−, and pnπ+ π−: some of which were kinematically-complete measurements of three-particle and four-particle final states. Details of the detector components, their performance, data acquisition, event reconstruction analyses, and detector-acceptance calculations are described together with the results of experience acquired in those experiments. A TAGX improvement in the momentum resolution required for charged particle measurements in the 1-GeV photon energy region is also reported.
