Abstract
To develop the next generation of safe and cleaner nuclear energy, the accelerator-driven subcritical (ADS) system emerges as one of the most attractive technologies. It will be able to transmute the long-lived transuranic radionuclides produced in the reactors of today's nuclear power plants into shorter-lived ones, and also it will provide positive energy output at the same time. The prototype of the Chinese ADS (C-ADS) proton accelerator comprises two injectors and a 1.5 GeV, 10 mA continuous wave (CW) superconducting main linac. The injector scheme II at the C-ADS demo facility inside the Institute of Modern Physics is a 10 MeV CW superconducting linac with a designed beam current of 10 mA, which includes an ECR ion source, a low-energy beam transport line, a 162.5 MHz radio frequency quadrupole accelerator, a medium-energy beam transport line, and a superconducting half wave resonator accelerator section. This demo facility has been successfully operating with an 11 mA, 2.7 MeV CW beam and a 3.9 mA, 4.3 MeV CW beam at different times and conditions since June 2014. The beam power has reached 28 kW, which is the highest record for the same type of linear accelerators. In this paper, the parameters of the test injector II and the progress of the beam commissioning are reported.
Highlights
The accelerator-driven subcritical (ADS) system, one of the technologies for a clean nuclear power source, was proposed a long time ago [1,2,3]
The ADS system emerges as one of the most attractive cutting-edge technologies to transmute minor actinides and long-lived fission products produced in the reactors of today’s nuclear power plants into relatively much shorter-lived or stable ones to largely reduce the burden of nuclear waste management and at the same time to generate positive energy output
The normalized beam emittance deduced from the measurement is about 0.13 π mm mrad when we traced back to the radio frequency quadrupole accelerator (RFQ) entrance, and it satisfies the design goal
Summary
The accelerator-driven subcritical (ADS) system, one of the technologies for a clean nuclear power source, was proposed a long time ago [1,2,3]. The ADS system emerges as one of the most attractive cutting-edge technologies to transmute minor actinides and long-lived fission products produced in the reactors of today’s nuclear power plants (as nuclear waste) into relatively much shorter-lived or stable ones to largely reduce the burden of nuclear waste management and at the same time to generate positive energy output. (In this paper, the beam emittance and envelopes are all rms values if not especially mentioned.) Since it is the first superconducting CW proton linac in China, the designs and operations of similar linacs all over the world have been studied. The details of the machine commissioning studies of the injector scheme II will be presented
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