Lattice Design Of Jhf Synchrotrons

Abstract

Several kinds of lattice structures have been designed and examined for the JHF synchrotorons. The high(or imaginary) fl t lattice has been used as the 50 GeV main ring to avoid beam loss at the transition crossing. We have studied the feasibility to apply this scheme to the 3 GeV booster as a flexible momentum compaction lattice. These rings have wide tunablilities and flexibilities of the linear optics. The possibility of increasing the extraction energy of the booster to 6 GeV has been investigated. 1 INTRODUCTION The Japan Hadron Facility(JHF) consists of the 50 GeV main ring, the 3 GeV booster and the 200 MeV linac. Because the beam intensity of the main ring is extremely high (2\Theta10 14 ppp), a low beam loss is required. In order to avoid beam loss at the transition crossing, we have employed the imaginary fl t lattice which does not have a transition energy. The 3 GeV booster is a rapid cycle synchrotron of which repetition rate is 25 Hz. It will be constructed in the ex..