CERN Accelerating science

Article
Title	Preliminary design studies of a 100 MeV $H^{-}H^{+}$ LINAC as injector for SNS synchrotron/ADS LINAC
Author(s)	Pande, S A ; Prasad, M K ; Kulkarni, N S ; Hannurkar, P R
Affiliation	(Centre for Adv Technol)
Publication	2002
In:	Pramana - J. Phys. 59, 5 (2002) pp.859-869
In:	21st International Linear Accelerator Conference, Gyeongju, Korea, 19 - 23 Aug 2002, pp.e-proc. MO483
Subject category	Accelerators and Storage Rings
Abstract	It is proposed to construct a spallation neutron source (SNS) at Centre for Advanced Technology (CAT) based on a 1 GeV proton synchrotron with 100 MeV H/sup -/ LINAC as injector. Additionally, the LINAC can form the first 100 MeV part of a 1 GeV proton LINAC to be built in future for accelerator driven system (ADS) applications. We are exploring a configuration of the 100 MeV LINAC which will consist of an H/sup -/ ion source, a 4-6 MeV RFQ followed either by a 20 MeV drift tube LINAC (DTL) and 100 MeV separated function drift tube LINAC (SDTL) or a coupled cavity drift tube LINAC (CCDTL) structure. In this paper, we present the results of our preliminary physics design studies of the RFQ-SDTL, RFQ-CCDTL and RFQ-DTL-SDTL configurations. The design of the 4.5 MeV RFQ is discussed along with the matching sections between the RFQ-SDTL/DTL and RFQ-CCDTL. The choice of the accelerator configuration and that of various parameters of the individual accelerator structures under consideration are discussed. The design objectives are to arrive at a configuration which eases heat removal for CW operation and which is less prone to halo formation in order to reduce the beam loss at higher energies. (8 refs).