Μicro-structured tungsten: an advanced plasma-facing material

A. Terra; G. Sergienko; M. Tokar; D. Borodin; T. Dittmar; A. Huber; A. Kreter; Y. Martynova; S. Möller; M. Rasiński; M. Wirtz; Th Loewenhoff; D. Dorow-Gerspach; Y. Yuan; S. Brezinsek; B. Unterberg; Ch Linsmeier

doi:10.1016/j.nme.2019.02.007

Μicro-structured tungsten: an advanced plasma-facing material

A. Terra, G. Sergienko, M. Tokar, D. Borodin, T. Dittmar, A. Huber, A. Kreter, Y. Martynova, S. Möller, M. Rasiński, M. Wirtz, Th Loewenhoff, D. Dorow-Gerspach, Y. Yuan, S. Brezinsek, B. Unterberg, Ch Linsmeier

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

A micro-structuring of the tungsten plasma-facing surface can strongly reduce near surface thermal stresses induced by ELM heat fluxes. This approach has been confirmed by numerical simulations with the help of ANSYS software. For experimental tests, two 10 × 10 mm ² samples of micro-structured tungsten were manufactured. These consisted of 2000 and 5000 vertically packed tungsten fibres with dimensions of Ø240 µm × 2.4 mm and Ø150 µm × 2.4 mm, respectively. The 1.2 mm bottom parts of the fibres are embedded in a copper matrix. The top parts of the fibres have gaps about of 10 µm so they are not touching each others. The top of all tungsten fibres was electro-polished. A Nd:YAG laser with a pulse duration 1 ms and a pulse repetition frequency of 25 Hz was used to simulate up to 10 ⁵ ELM-like heat pulses. No damage on either of the micro-structured tungsten samples were observed. Neon plasma erosion rate and fuel retention of the micro-structured tungsten samples were almost identical to bulk tungsten samples.

Original language	English
Pages (from-to)	7-12
Number of pages	6
Journal	Nuclear Materials and Energy
Volume	19
DOIs	https://doi.org/10.1016/j.nme.2019.02.007
State	Published - May 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019

Keywords

Emissivity
Erosion
High heat load
Micro-structured tungsten
PFC
PFM
Retention
Thermal cycling

Access to Document

10.1016/j.nme.2019.02.007

Cite this

Terra, A., Sergienko, G., Tokar, M., Borodin, D., Dittmar, T., Huber, A., Kreter, A., Martynova, Y., Möller, S., Rasiński, M., Wirtz, M., Loewenhoff, T., Dorow-Gerspach, D., Yuan, Y., Brezinsek, S., Unterberg, B., & Linsmeier, C. (2019). Μicro-structured tungsten: an advanced plasma-facing material. Nuclear Materials and Energy, 19, 7-12. https://doi.org/10.1016/j.nme.2019.02.007

@article{2dc5f162935b4e6c874d45b2734ecda7,

title = "Μicro-structured tungsten: an advanced plasma-facing material",

abstract = " A micro-structuring of the tungsten plasma-facing surface can strongly reduce near surface thermal stresses induced by ELM heat fluxes. This approach has been confirmed by numerical simulations with the help of ANSYS software. For experimental tests, two 10 × 10 mm 2 samples of micro-structured tungsten were manufactured. These consisted of 2000 and 5000 vertically packed tungsten fibres with dimensions of {\O}240 µm × 2.4 mm and {\O}150 µm × 2.4 mm, respectively. The 1.2 mm bottom parts of the fibres are embedded in a copper matrix. The top parts of the fibres have gaps about of 10 µm so they are not touching each others. The top of all tungsten fibres was electro-polished. A Nd:YAG laser with a pulse duration 1 ms and a pulse repetition frequency of 25 Hz was used to simulate up to 10 5 ELM-like heat pulses. No damage on either of the micro-structured tungsten samples were observed. Neon plasma erosion rate and fuel retention of the micro-structured tungsten samples were almost identical to bulk tungsten samples.",

keywords = "Emissivity, Erosion, High heat load, Micro-structured tungsten, PFC, PFM, Retention, Thermal cycling",

author = "A. Terra and G. Sergienko and M. Tokar and D. Borodin and T. Dittmar and A. Huber and A. Kreter and Y. Martynova and S. M{\"o}ller and M. Rasi{\'n}ski and M. Wirtz and Th Loewenhoff and D. Dorow-Gerspach and Y. Yuan and S. Brezinsek and B. Unterberg and Ch Linsmeier",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2019",

month = may,

doi = "10.1016/j.nme.2019.02.007",

language = "אנגלית",

volume = "19",

pages = "7--12",

journal = "Nuclear Materials and Energy",

issn = "2352-1791",

publisher = "Elsevier Ltd.",

}

Terra, A, Sergienko, G, Tokar, M, Borodin, D, Dittmar, T, Huber, A, Kreter, A, Martynova, Y, Möller, S, Rasiński, M, Wirtz, M, Loewenhoff, T, Dorow-Gerspach, D, Yuan, Y, Brezinsek, S, Unterberg, B & Linsmeier, C 2019, 'Μicro-structured tungsten: an advanced plasma-facing material', Nuclear Materials and Energy, vol. 19, pp. 7-12. https://doi.org/10.1016/j.nme.2019.02.007

TY - JOUR

T1 - Μicro-structured tungsten

T2 - an advanced plasma-facing material

AU - Terra, A.

AU - Sergienko, G.

AU - Tokar, M.

AU - Borodin, D.

AU - Dittmar, T.

AU - Huber, A.

AU - Kreter, A.

AU - Martynova, Y.

AU - Möller, S.

AU - Rasiński, M.

AU - Wirtz, M.

AU - Loewenhoff, Th

AU - Dorow-Gerspach, D.

AU - Yuan, Y.

AU - Brezinsek, S.

AU - Unterberg, B.

AU - Linsmeier, Ch

PY - 2019/5

Y1 - 2019/5

N2 - A micro-structuring of the tungsten plasma-facing surface can strongly reduce near surface thermal stresses induced by ELM heat fluxes. This approach has been confirmed by numerical simulations with the help of ANSYS software. For experimental tests, two 10 × 10 mm 2 samples of micro-structured tungsten were manufactured. These consisted of 2000 and 5000 vertically packed tungsten fibres with dimensions of Ø240 µm × 2.4 mm and Ø150 µm × 2.4 mm, respectively. The 1.2 mm bottom parts of the fibres are embedded in a copper matrix. The top parts of the fibres have gaps about of 10 µm so they are not touching each others. The top of all tungsten fibres was electro-polished. A Nd:YAG laser with a pulse duration 1 ms and a pulse repetition frequency of 25 Hz was used to simulate up to 10 5 ELM-like heat pulses. No damage on either of the micro-structured tungsten samples were observed. Neon plasma erosion rate and fuel retention of the micro-structured tungsten samples were almost identical to bulk tungsten samples.

AB - A micro-structuring of the tungsten plasma-facing surface can strongly reduce near surface thermal stresses induced by ELM heat fluxes. This approach has been confirmed by numerical simulations with the help of ANSYS software. For experimental tests, two 10 × 10 mm 2 samples of micro-structured tungsten were manufactured. These consisted of 2000 and 5000 vertically packed tungsten fibres with dimensions of Ø240 µm × 2.4 mm and Ø150 µm × 2.4 mm, respectively. The 1.2 mm bottom parts of the fibres are embedded in a copper matrix. The top parts of the fibres have gaps about of 10 µm so they are not touching each others. The top of all tungsten fibres was electro-polished. A Nd:YAG laser with a pulse duration 1 ms and a pulse repetition frequency of 25 Hz was used to simulate up to 10 5 ELM-like heat pulses. No damage on either of the micro-structured tungsten samples were observed. Neon plasma erosion rate and fuel retention of the micro-structured tungsten samples were almost identical to bulk tungsten samples.

KW - Emissivity

KW - Erosion

KW - High heat load

KW - Micro-structured tungsten

KW - PFC

KW - PFM

KW - Retention

KW - Thermal cycling

UR - http://www.scopus.com/inward/record.url?scp=85061274585&partnerID=8YFLogxK

U2 - 10.1016/j.nme.2019.02.007

DO - 10.1016/j.nme.2019.02.007

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:85061274585

SN - 2352-1791

VL - 19

SP - 7

EP - 12

JO - Nuclear Materials and Energy

JF - Nuclear Materials and Energy

ER -

Μicro-structured tungsten: an advanced plasma-facing material

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this