Design overview of the ITER core CXRS fast shutter and manufacturing implications during the detailed design work

ITER perspective on fusion reactor diagnostics—A spectroscopic view

“…Moreover, physically moving shutter blades in vacuum, while being subject to high heat and neutron loads is not trivial and increases the risk of the shutter getting stuck in 'closed' position. In [5] a prototype shutter is shown that is actively cooled and uses friction-free bending of long shutter arms to fast and reliably open and close the shutter blades.…”

Status of the R&D activities to the design of an ITER core CXRS diagnostic system

“…It will be tested in air and in a vacuum chamber to optimise the mechanical layout and the actuator gas loop system. Designed to meet the severe ITER environment, it is made in a full-scale complexity to check its manufacturability and achievable tolerances [20]. The other one is a parametric, simplified mock-up with easily changeable mechanical characteristics like stiffness and mass.…”

“…The mechanical performance of both shutters, initially designed to be similar, is now somewhat different due to changes during the detailed design and manufacturing phases (see [20] and [21] for details). A test programme aimed for further shutter optimisation, basing on the analysis performed and engaging the powerful capabilities of the parametric shutter mock-up has been established in [19,21].…”