Microstructural effects of temperature and neutron irradiation on optical windows

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Microstructural effects of temperature and neutron irradiation on optical windows. / Jacobs, Marijke; Van Oost, Guido; Degrieck, Joris; Goussarov, Andrei; Massaut, Vincent; Schyns, Marc; Vermeeren, Ludo (Peer reviewer).

In: Journal of Nuclear Materials, Vol. 417, No. 1-3, 01.10.2011, p. 826-829.

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Jacobs, Marijke ; Van Oost, Guido ; Degrieck, Joris ; Goussarov, Andrei ; Massaut, Vincent ; Schyns, Marc ; Vermeeren, Ludo. / Microstructural effects of temperature and neutron irradiation on optical windows. In: Journal of Nuclear Materials. 2011 ; Vol. 417, No. 1-3. pp. 826-829.

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@article{ea2795fd26174acd969f1a3a9bdddec1,
title = "Microstructural effects of temperature and neutron irradiation on optical windows",
abstract = "Optical windows, installed on the vacuum vessel in ITER, require glass-metal joints, which must be leak tight to preserve vacuum and to confine the tritium. The joints will be subjected to temperature variations up to 250°C and intense neutron fluxes. To better understand the impact of such environment on the joints performance we analyzed the effect of thermal cycling and neutron radiation on the microstructure of the glass-metal interface of a fused silica viewport using SEM. We observed that thermal cycling up to 150°C created cracks in the joint near the glass element. Apparently, the big difference in thermal expansion coefficient between the glass and the metal makes it difficult to withstand the thermal cycling test without damage. Subsequent neutron irradiation up to 10^18 n/cm2 modified the cracks structure only slightly, but the glass-metal interface became more uniform and small pits were observed with SEM.",
keywords = "ITER, Optical windows, Irradiation effect",
author = "Marijke Jacobs and {Van Oost}, Guido and Joris Degrieck and Andrei Goussarov and Vincent Massaut and Marc Schyns and Ludo Vermeeren",
note = "Score = 10",
year = "2011",
month = oct,
day = "1",
doi = "10.1016/j.jnucmat.2010.12.145",
language = "English",
volume = "417",
pages = "826--829",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",
number = "1-3",

}

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TY - JOUR

T1 - Microstructural effects of temperature and neutron irradiation on optical windows

AU - Jacobs, Marijke

AU - Van Oost, Guido

AU - Degrieck, Joris

AU - Goussarov, Andrei

AU - Massaut, Vincent

AU - Schyns, Marc

A2 - Vermeeren, Ludo

N1 - Score = 10

PY - 2011/10/1

Y1 - 2011/10/1

N2 - Optical windows, installed on the vacuum vessel in ITER, require glass-metal joints, which must be leak tight to preserve vacuum and to confine the tritium. The joints will be subjected to temperature variations up to 250°C and intense neutron fluxes. To better understand the impact of such environment on the joints performance we analyzed the effect of thermal cycling and neutron radiation on the microstructure of the glass-metal interface of a fused silica viewport using SEM. We observed that thermal cycling up to 150°C created cracks in the joint near the glass element. Apparently, the big difference in thermal expansion coefficient between the glass and the metal makes it difficult to withstand the thermal cycling test without damage. Subsequent neutron irradiation up to 10^18 n/cm2 modified the cracks structure only slightly, but the glass-metal interface became more uniform and small pits were observed with SEM.

AB - Optical windows, installed on the vacuum vessel in ITER, require glass-metal joints, which must be leak tight to preserve vacuum and to confine the tritium. The joints will be subjected to temperature variations up to 250°C and intense neutron fluxes. To better understand the impact of such environment on the joints performance we analyzed the effect of thermal cycling and neutron radiation on the microstructure of the glass-metal interface of a fused silica viewport using SEM. We observed that thermal cycling up to 150°C created cracks in the joint near the glass element. Apparently, the big difference in thermal expansion coefficient between the glass and the metal makes it difficult to withstand the thermal cycling test without damage. Subsequent neutron irradiation up to 10^18 n/cm2 modified the cracks structure only slightly, but the glass-metal interface became more uniform and small pits were observed with SEM.

KW - ITER

KW - Optical windows

KW - Irradiation effect

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_119134

UR - http://knowledgecentre.sckcen.be/so2/bibref/8831

U2 - 10.1016/j.jnucmat.2010.12.145

DO - 10.1016/j.jnucmat.2010.12.145

M3 - Article

VL - 417

SP - 826

EP - 829

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - 1-3

ER -

ID: 210424