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Direct comparative test of single crystal and polycrystalline diagnostic mirrors exposed in TEXTOR in erosion conditions

Litnovsky, A. (author)
De Temmerman, G. (author)
Wienhold, P. (author)
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Philipps, V. (author)
Schmitz, O. (author)
Samm, U. (author)
Sergienko, G. (author)
Oelhafen, P. (author)
Rubel, Marek (author)
KTH,Fusionsplasmafysik,Alfvénlaboratoriet
Emmoth, Birger (author)
KTH,Mikroelektronik och Informationsteknik, IMIT
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 (creator_code:org_t)
2005
2005
English.
In: 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets. - 9781622763320 ; , s. 1726-1729
  • Conference paper (peer-reviewed)
Abstract Subject headings
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  • First direct comparative test of single crystal and polycrystalline diagnostic mirror materials under erosion conditions has been made in TEXTOR. Before exposure in TEXTOR, glow discharge cleaning has efficiently restored the reflectivity of initially oxidized mirrors. After the exposure, no significant changes in total reflectivity were observed. Drastic increase of diffuse reflectivity was measured for polycrystalline molybdenum mirror, but not for the single crystal. Thus, specular reflectivity of single crystal is significantly higher than of polycrystalline one. The most affected wavelength range is 250-1000 nm, no significant changes of reflectivity was noticed in the range 1000-2000 nm. No or negligible effect of erosion on polarization characteristics of mirrors was measured.

Subject headings

NATURVETENSKAP  -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)

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kon (subject category)

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