Abstract
The physics design of a 3 MeV, 30 mA, 352.2 MHz Radio Frequency Quadrupole (RFQ) is done for the future Indian Spallation Neutron Source (ISNS) project at RRCAT, India. The beam dynamics design of RFQ and the error analysis of the input beam parameters are done by using standard beam dynamics code PARMTEQM. The electromagnetic stu-dies for the two-dimensional and three-dimensional cavity design are performed using computer codes SUPERFISH and CST Microwave Studio. The physics design of RFQ consisting of the beam dynamics design near the beam axis and the electromagnetic design for the RFQ resonator is described here.
Highlights
A 1 GeV proton synchrotron facility is envisaged for ISNS (Indian Spallation Neutron Source) project at RRCAT, India
An Radio Frequency Quadrupole (RFQ) is designed for 352.2 MHz operating frequency and 30 mA beam current of H- particles, which has to be accelerated from 50 keV to 3 MeV, to serve as a low energy front-end injector of 100 MeV linac
The beam dynamics study of RFQ is done with the help of PARMTEQM simulation code
Summary
A 1 GeV proton synchrotron facility is envisaged for ISNS (Indian Spallation Neutron Source) project at RRCAT, India. Being very much efficient accelerator for ions in low energy region, Radio Frequency Quadrupole (RFQ) [1,2] is one of the main components in the front-end system which accelerates 30 mA beam current of H- particles at 50 keV from ion source to 3 MeV. The RFQ is decided to be pulsed with the duty factor of 1.25%, the constraint of higher power dissipation capability of the structure can be relaxed in pulsed operation. Considering these facts as well as due to the availability of high power RF sources, the operating frequency of RFQ is selected to be 352.2 MHz. The structure of RFQ is selected to be four-vane type because of higher efficient at higher frequency. The various studies which were performed for the design of the RFQ are described
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