Joining technology and material and shape optimization for the ICRF vacuum transmission line dielectric window

Pertti Auerkari; Liisa Heikinheimo; Jukka Heikkinen; Juha Linden; Markku Kemppainen; K. Kotikangas; S. Nuutinen; Seppo Orivuori; Markku Peräniitty; Samuli Saarelma; M. Sirén; Seppo Tähtinen; Frej Wasastjerna; G. Bosia; Elizabeth Hodgson

doi:10.1016/B978-0-444-82762-3.50166-X

Joining technology and material and shape optimization for the ICRF vacuum transmission line dielectric window

Pertti Auerkari, Liisa Heikinheimo, Jukka Heikkinen, Juha Linden, Markku Kemppainen, K. Kotikangas, S. Nuutinen, Seppo Orivuori, Markku Peräniitty, Samuli Saarelma, M. Sirén, Seppo Tähtinen, Frej Wasastjerna, G. Bosia, Elizabeth Hodgson

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific

Abstract

The choice of dielectric material for the (double) dielectric window of the ITER ICRF Transmission Line is optimized with respect to nuclear, mechanical, and thermal properties. Neutron fluence at the window placed in the vacuum vessel feedthrough is obtained with MCNP-4 to be sufficiently small for allowing beryllia, but not alumina without additional neutron shielding, to be used as dielectrics. For beryllia (10−3 dpa) or for unirradiated alumina, the temperature is found to stay between the cooling temperature and 200°C with maximum hoop stress less than 100 MPa, provided titanium, niobium or materials with similar thermal expansion coefficients are used as support. Based on experimental vacuum tightness and shear strength tests for alumina-titanium joints, three potential brazing filler metals have been identified for bonding.

Original language	English
Title of host publication	Fusion Technology 1996
Subtitle of host publication	Proceedings of the 19th Symposium on Fusion Technology
Editors	C. Varandas, F. Serra
Place of Publication	Amsterdam
Publisher	Elsevier
Pages	787-790
Volume	1
ISBN (Print)	978-0-444-59975-9
DOIs	https://doi.org/10.1016/B978-0-444-82762-3.50166-X
Publication status	Published - 1997
MoE publication type	B3 Non-refereed article in conference proceedings
Event	Fusion Technology 1996: 19th Symposium on Fusion Technology - Lisbon, Portugal Duration: 16 Sept 1996 → 20 Sept 1996

Conference

Conference	Fusion Technology 1996
Country/Territory	Portugal
City	Lisbon
Period	16/09/96 → 20/09/96

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10.1016/B978-0-444-82762-3.50166-X

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Auerkari, P., Heikinheimo, L., Heikkinen, J., Linden, J., Kemppainen, M., Kotikangas, K., Nuutinen, S., Orivuori, S., Peräniitty, M., Saarelma, S., Sirén, M., Tähtinen, S., Wasastjerna, F., Bosia, G., & Hodgson, E. (1997). Joining technology and material and shape optimization for the ICRF vacuum transmission line dielectric window. In C. Varandas, & F. Serra (Eds.), Fusion Technology 1996: Proceedings of the 19th Symposium on Fusion Technology (Vol. 1, pp. 787-790). Elsevier. https://doi.org/10.1016/B978-0-444-82762-3.50166-X

@inproceedings{757f7943547d43cb8609d255fdf200b8,

title = "Joining technology and material and shape optimization for the ICRF vacuum transmission line dielectric window",

abstract = "The choice of dielectric material for the (double) dielectric window of the ITER ICRF Transmission Line is optimized with respect to nuclear, mechanical, and thermal properties. Neutron fluence at the window placed in the vacuum vessel feedthrough is obtained with MCNP-4 to be sufficiently small for allowing beryllia, but not alumina without additional neutron shielding, to be used as dielectrics. For beryllia (10−3 dpa) or for unirradiated alumina, the temperature is found to stay between the cooling temperature and 200°C with maximum hoop stress less than 100 MPa, provided titanium, niobium or materials with similar thermal expansion coefficients are used as support. Based on experimental vacuum tightness and shear strength tests for alumina-titanium joints, three potential brazing filler metals have been identified for bonding.",

author = "Pertti Auerkari and Liisa Heikinheimo and Jukka Heikkinen and Juha Linden and Markku Kemppainen and K. Kotikangas and S. Nuutinen and Seppo Orivuori and Markku Per{\"a}niitty and Samuli Saarelma and M. Sir{\'e}n and Seppo T{\"a}htinen and Frej Wasastjerna and G. Bosia and Elizabeth Hodgson",

note = "Project code: ENE9606; Fusion Technology 1996 : 19th Symposium on Fusion Technology ; Conference date: 16-09-1996 Through 20-09-1996",

year = "1997",

doi = "10.1016/B978-0-444-82762-3.50166-X",

language = "English",

isbn = "978-0-444-59975-9",

volume = "1",

pages = "787--790",

editor = "C. Varandas and F. Serra",

booktitle = "Fusion Technology 1996",

publisher = "Elsevier",

address = "Netherlands",

}

Auerkari, P, Heikinheimo, L, Heikkinen, J, Linden, J, Kemppainen, M, Kotikangas, K, Nuutinen, S, Orivuori, S, Peräniitty, M, Saarelma, S, Sirén, M, Tähtinen, S, Wasastjerna, F, Bosia, G & Hodgson, E 1997, Joining technology and material and shape optimization for the ICRF vacuum transmission line dielectric window. in C Varandas & F Serra (eds), Fusion Technology 1996: Proceedings of the 19th Symposium on Fusion Technology. vol. 1, Elsevier, Amsterdam, pp. 787-790, Fusion Technology 1996, Lisbon, Portugal, 16/09/96. https://doi.org/10.1016/B978-0-444-82762-3.50166-X

Joining technology and material and shape optimization for the ICRF vacuum transmission line dielectric window. / Auerkari, Pertti; Heikinheimo, Liisa; Heikkinen, Jukka et al.
Fusion Technology 1996: Proceedings of the 19th Symposium on Fusion Technology. ed. / C. Varandas; F. Serra. Vol. 1 Amsterdam: Elsevier, 1997. p. 787-790.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific

TY - GEN

T1 - Joining technology and material and shape optimization for the ICRF vacuum transmission line dielectric window

AU - Auerkari, Pertti

AU - Heikinheimo, Liisa

AU - Heikkinen, Jukka

AU - Linden, Juha

AU - Kemppainen, Markku

AU - Kotikangas, K.

AU - Nuutinen, S.

AU - Orivuori, Seppo

AU - Peräniitty, Markku

AU - Saarelma, Samuli

AU - Sirén, M.

AU - Tähtinen, Seppo

AU - Wasastjerna, Frej

AU - Bosia, G.

AU - Hodgson, Elizabeth

N1 - Project code: ENE9606

PY - 1997

Y1 - 1997

N2 - The choice of dielectric material for the (double) dielectric window of the ITER ICRF Transmission Line is optimized with respect to nuclear, mechanical, and thermal properties. Neutron fluence at the window placed in the vacuum vessel feedthrough is obtained with MCNP-4 to be sufficiently small for allowing beryllia, but not alumina without additional neutron shielding, to be used as dielectrics. For beryllia (10−3 dpa) or for unirradiated alumina, the temperature is found to stay between the cooling temperature and 200°C with maximum hoop stress less than 100 MPa, provided titanium, niobium or materials with similar thermal expansion coefficients are used as support. Based on experimental vacuum tightness and shear strength tests for alumina-titanium joints, three potential brazing filler metals have been identified for bonding.

AB - The choice of dielectric material for the (double) dielectric window of the ITER ICRF Transmission Line is optimized with respect to nuclear, mechanical, and thermal properties. Neutron fluence at the window placed in the vacuum vessel feedthrough is obtained with MCNP-4 to be sufficiently small for allowing beryllia, but not alumina without additional neutron shielding, to be used as dielectrics. For beryllia (10−3 dpa) or for unirradiated alumina, the temperature is found to stay between the cooling temperature and 200°C with maximum hoop stress less than 100 MPa, provided titanium, niobium or materials with similar thermal expansion coefficients are used as support. Based on experimental vacuum tightness and shear strength tests for alumina-titanium joints, three potential brazing filler metals have been identified for bonding.

U2 - 10.1016/B978-0-444-82762-3.50166-X

DO - 10.1016/B978-0-444-82762-3.50166-X

M3 - Conference article in proceedings

SN - 978-0-444-59975-9

VL - 1

SP - 787

EP - 790

BT - Fusion Technology 1996

A2 - Varandas, C.

A2 - Serra, F.

PB - Elsevier

CY - Amsterdam

T2 - Fusion Technology 1996

Y2 - 16 September 1996 through 20 September 1996

ER -

Auerkari P, Heikinheimo L, Heikkinen J, Linden J, Kemppainen M, Kotikangas K et al. Joining technology and material and shape optimization for the ICRF vacuum transmission line dielectric window. In Varandas C, Serra F, editors, Fusion Technology 1996: Proceedings of the 19th Symposium on Fusion Technology. Vol. 1. Amsterdam: Elsevier. 1997. p. 787-790 doi: 10.1016/B978-0-444-82762-3.50166-X

Joining technology and material and shape optimization for the ICRF vacuum transmission line dielectric window

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