D. RAPARIA, A. G. RUGGIERO (BNL)
It has been proposed to upgrade the AGS accelerator to provide an average proton beam power of 4 MW at the energy of 24 GeV. The facility can be used either as a proton driver for the production of intense muon and neutrino beams, or/and as a pulsed high-energy spallation neutron source. The upgrade requires operation of the accelerator at the rate of 5 cycles per second, and a new injector for an increase of the AGS beam intensity by a factor of two. The proposed new injector is a 1.5-2.4 GeV Super-Conducting Linac with an average output beam power of 250-400 kWatt. The largest energy is determined by the capability to limit beam losses due to stripping of the negative-ions that are used for multi-turn injection into the AGS. The Linac duty cycle is about 1%. The operation frequency is 805 MHz. The paper describes the design of the Linac. It is composed of three sections: a Front-End, that is a 60-mA negative-ion source, followed by a 5-MeV RFQ, a room temperature Drift-Tube Linac (DTL) that accelerates protons to 150 MeV, and the Super-Conducting Linac proper (SCL). This is made of two sections: the medium-energy section that accelerates protons to 300 MeV, and the high-energy section that accelerates to the final energy.
* Work performed under the auspices of the US Department Of Energy
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