| Paper | Title | Page |
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MOAA01 |
Design of the Superconducting Linac for CiADS Facing High Reliability | |
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Funding: Supported by NSF U22A20261, Large Research Infrastructures - China initiative Accelerator Driven System CiADS is the world’s first Accelerator Driven System with a Mega-watt beam power. The linac of CiADS consists of a 500 MeV and 5 mA with five-family superconducting resonators located directly downstream of the Radio Frequency Quadrupole (RFQ). The most significant challenge in designing the superconducting linac for CiADS is to ensure high-reliability operation with minimal beam loss control at 10-7 level and availability maximization through specifically designed hardware and software. In this presentation, we will discuss the physical design of the superconducting linac, including the fault compensation based on beam loss control and high reliability designs of the RF amplifier and power supply. |
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TUPB003 |
A Beam Splitting System for High Power CW Proton Beam | |
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| A novel method for splitting the high power, continuous wave (CW) proton beam in two or more branches with low losses has been developed. The aim of the beam splitting system (BSS) is to deliver up to 750 kW (150 MeV@5 mA) of proton beam to 6 terminals simultaneously. A three-step method is used, which includes cavity deflecting, quadrupoles focusing and septum magnets bending. The same method will be applied in isotope production devices for higher isotope production efficiency. | ||
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TUPB022 |
Observation of Pilot H⁻ Beam in high power proton linac | |
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| Chinese ADS Front End (CAFe) is a demo high-power proton superconducting linac for ADS project. During high-power beam commissioning of CAFe, unexpected irradiation dose was observed at the vacuum valve at the exit of the dipole magnet opposite to the proton beam deflection direction. The reason of the irradiation cannot be explained by neutron induced reaction or the operation history of the dipole magnet. A gamma-ray analysis of radionuclides is performed with the wipe sample from the valve, excluding the possibility of the neutron induced activation and verifying the proton induced reaction. Thus, it is supposed that H¿ beam is generated at the low energy transport section and accelerated simultaneously with proton beam in the superconducting linac. In this paper, The accelerating efficiency of pilot H⁻ beam is studied with multi-particle simulation software, Tracewin. The yield of H⁻ beam is obtained by cross section calculation of proton beam with residual gas at low energy transport section. The accumulated dose at the vacuum valve is calculated by FLUKA code and compared to the simulation result. | ||
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