Broadband dielectric mirrors for optical diagnostics in ITER

Orlovskiy, I.I.; Andreenko, E.N.; Vukolov, K.Yu.; Mukhammedzyanov, T.R.; Tobengauz, A.M.

doi:10.1016/j.fusengdes.2013.01.072

Cited by 5 publications

(2 citation statements)

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“…While little further work has been done recently concerning simple broadband overcoated SMs, work on narrowband multilayer or DMs has continued with considerable success [52][53][54][55][56][57][58][59]. Multi-layered thin-film DMs are made up of alternating λ/four layers of high and low refractive index materials such as Al 2 O 3 /SiO 2 , HfO 2 /SiO 2 , TiO 2 /SiO 2 , and ZrO 2 /SiO 2 .…”

Section: Secondary Mirrors (Sm)mentioning

confidence: 99%

Functional materials for tokamak in-vessel systems—status and developments

2017

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The challenge to be faced in ITER and DEMO, as well as future fusion power plants (PPs), by the insulating (functional) materials for use not only in the magnetic coils and heating systems but for safety and control diagnostics is daunting. The available data on thermomechanical properties (strength, swelling, thermal conductivity) indicate that suitable materials are available for doses >1 dpa. However, for the important physical properties which degrade at far lower doses, data are generally only available for doses 1 dpa, corresponding at most to ITER expectations. To address this, the selection and development of potential radiation hard materials and components for diagnostic, H&CD, and other systems for DEMO and PPs is urgently needed, and will also assist in defining the materials test requirements for materials test reactors and IFMIF. This paper reviews the current data and basic knowledge for materials required for optical, DC electric, and AC/RF dielectric applications. A short discussion of the associated R&D needs/requirements deduced from missing or limited irradiation data is also presented.

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Section: Secondary Mirrors (Sm)mentioning

confidence: 99%

Functional materials for tokamak in-vessel systems—status and developments

2017

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“…Nb 2 O 5 /SiO 2 , TiO 2 /SiO 2 and ZrO 2 /SiO 2 are of interest for fusion diagnostic systems as they can provide higher specular reflectivity in the visible wavelength range than any other material. Testing under fusion reactor conditions has shown that coating suitability differs between materials but also manufacturers [1][2][3]. In these tests, elevated temperatures as present in ITER at 240 • C during vacuum bake-out were found to be among the critical * Corresponding author.…”

Section: Overviewmentioning

confidence: 99%