Author/Authors :
Tanaka، نويسنده , , K.H. and Ieiri، نويسنده , , M. and Noumi، نويسنده , , H. and Minakawa، نويسنده , , M. and Yamanoi، نويسنده , , Y. and Kato، نويسنده , , Y. and Ishii، نويسنده , , H. and Suzuki، نويسنده , , Y. and Takasaki، نويسنده , , M.، نويسنده ,
Abstract :
A new counter experimental hall [K.H. Tanaka et al., IEEE Trans. Magn. 28 (1992) 697] was designed and constructed at the KEK 12-GeV Proton Synchrotron (KEK-PS). The extracted proton beam from the KEK-PS is introduced to the new hall through the newly-prepared primary beam line, EP1, and hits two production targets in cascade. The upstream target provides secondary particles to the low momentum (0.4–0.6 GeVc) separated beam line, K5, and the downstream target is connected to the medium momentum (0.6–2.0 GeV/c) separated beam line, K6. Several new ideas were employed in the beam optical designs of EP1, K5 and K6 in order to increase the number and the purity of the short-lived secondary particles, such as kaons and pions, under the limited energy and intensity of the primary protons provided by the KEK-PS. These new ideas are described in this paper as well as the first commissioning results.
