Injection acceleration and extraction of high intensity proton beam for the "neutrino facility" project at bnl

Abstract

The proposed project to be built at the Brookhaven National Laboratory (BNL) requires that the neutrino-production target be bombarded by a high intensity proton beam-pulse of /spl sim/90/spl times/10/sup 12/ protons of 28 GeV in energy and at a rate of 2.5 Hz, resulting in a 1 MW power of proton beam deposited on the target for the production of the neutrinos. In this paper we investigate the possibility of producing this high intensity proton beam, using as the main accelerator the Alternating Gradient Synchrotron (AGS) at the Brookhaven National Laboratory (BNL). The following aspects of the project are reported in this paper: a) The beam injection into the AGS synchrotron of 1.2 GeV H/sup -/ beam produced by a super-conducting LINAC; b) The effect of the eddy currents induced on the vacuum chamber of the circulating beam during the ramping of the main magnets of the AGS. c) The method of the beam extraction from the AGS and the optics of the 28 GeV beam extracted from the AGS.