Abstract
We describe and compare two optimized design options of RF linear accelerators with different resonant frequencies at 162.5 MHz (f0) and 325 MHz (2∙f0). The RFQ + DTL linacs have been designed to provide 13 MeV acceleration to a proton beam for achieving a fast neutron yield of not lower than 1013 n/s via 9Be(p, n)9B reaction in pulsed-mode operation. Our design studies show that none of the two options is better than the other, but that the choice of operating frequency will mainly be determined by the accelerator length and RF cost consideration. This study can serve as a basis for the design of an initial stage of a new high brilliance Compact Accelerator-driven Neutron Source (CANS), aiming to use neutron scattering techniques for studying material properties in fundamental physics, materials science, nuclear energy, as well as for industries and societal challenges.
Highlights
Compact Accelerator-based Neutron Source (CANS) facilities [1,2,3,4,5] create the possibility of an intense source of neutrons with modest capital cost, more flexible than a dedicated fission reactor or a spallation neutron source [6,7,8,9,10] in terms of management of targets and wastes, accelerator-upgrading, safety constraints, decommissioning, etc
We only study options using radio frequency quadrupole (RFQ) + drift-tube linac (DTL) linacs as accelerating structures, comparing designs at two different frequencies of f0 = 162.5 MHz and 2·f0 = 325 MHz
Though the 162.5 MHz design has a longer length of 13.7 m, the total power is only 750 kW, which is one-half of the 325
Summary
Compact Accelerator-based Neutron Source (CANS) facilities [1,2,3,4,5] create the possibility of an intense source of neutrons with modest capital cost, more flexible than a dedicated fission reactor or a spallation neutron source [6,7,8,9,10] in terms of management of targets and wastes, accelerator-upgrading, safety constraints, decommissioning, etc. As the proton beam moves to higher energy, of the neutron yield from beryllium is superior to lithium. Compared to (d, n) the total neutron yields have been collected from the literature for proton energies up to reactions, the neutron spectrum is relatively soft, which will benefit moderation. Considering the requirements of input proton beam current and bombarding energy, target activation, the maximum proton energy should not exceed 13.4 MeV This choice of the total neutron yields have been collected from the literature for proton energies up to maximum proton energy is used in the rest of the paper for the design of the presented.
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