Optical properties of various structural forms of zinc oxide

Zelikin, Ya. M.; Morozova, N. K.; Galstyan, V. G.; Muratova, V. I.; Berdnikov, S. M.

doi:10.1007/bf00665071

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Plasma Facing Optical Components1

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2006

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“…For an un-cooled ZnS or ZnSe vacuum window this can lead to temperatures in excess of 400 • C at which both materials start to decompose in an oxidizing atmosphere, such as air or oxygen. Under these conditions a ZnO film forms at the air side of the windows [203] affecting their transmission properties [204,205], e.g. an uncooled ZnSe window in the W7-X ECRH stray radiation test chamber became opaque in the visible [92].…”

Section: Plasma Facing Optical Componentsmentioning

confidence: 99%

Diagnostics for steady state plasmas

Hartfuß¹,

König²,

Werner³

2006

Plasma Phys. Control. Fusion

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Problems related to the development of diagnostics for steady state fusion plasma experiments are being discussed. The paper concentrates on those necessities already appearing in nowadays non-burning plasma fusion experiments when extending pulse lengths beyond 10 s, i.e. thermal load, erosion, deposition, and long-time signal integration in magnetic diagnostics. Problems arising from high power ECRH under conditions of incomplete absorption are outlined. Individual standard diagnostic systems are discussed to identify their specific problems as well as the opportunities connected with long pulse operation. Burning plasma experiments characterized by intense n-and g-radiation are briefly reviewed for reasons of completeness, dealing with radiation induced processes in windows, fibres, cables, and mirrors. Methods of data handling, real time monitoring, and plasma control are outlined. Index

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Section: Plasma Facing Optical Componentsmentioning

confidence: 99%