Design status of the vacuum system of IFMIF-DONES particle accelerator

Le résumé fourni par la source

The International Fusion Materials Irradiation Facility-DEMO Oriented Neutron Source (IFMIF-DONES) will be an installation capable of qualifying materials for use in future fusion power reactors. To do so, a linear accelerator will deliver high-intensity deuteron beam to a liquid Li loop, creating a flow of neutrons that will produce material damage equivalent to that expected in a fusion reactor. The vacuum system must maintain high vacuum conditions during operation with high reliability. For this reason, a careful study of the vacuum has been assessed and implemented in the accelerator project. Vacuum simulations have been performed in order to have a first estimation of the expected pressure profile, and documentation is being produced to standardize the subsystem. Additionally, valuable knowledge from the prototype installation, IFMIF/Engineering Design and Engineering Validation Activities (EVEDA), is being taking into account in engineering design activities. Moreover, two vacuum related prototypes are being manufactured; the Multipurpose Vacuum Accident Scenarios (MuVacAS) prototype will enable experimental studies of air inrush in the last section of the accelerator; and the Quick Disconnecting System (QDS) prototype is being developed to study the feasibility of the remote handling of the interface located between the accelerator beam line and the target chamber. The paper presents the status of the design of the vacuum subsystem of the accelerator and discusses the future challenges. • The vacuum system of IFMIF DONES will maintain high vacuum levels to ensure beam transport is performed. • The vacuum system has been harmonized in all sections of the particle accelerator by using TMPs and NEGs. • Studies have been conducted to make an initial estimation of the pressure profiles. • Several prototypes for the IFMIF-DONES vacuum system are in the process of being built or commissioned.

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