Thermo-oxidation and analysis of JET codeposits

A. A. Haasz; Jari Likonen; J. P. Coad; C. K. Tsui; J. W. Davis; A. M. Widdowson

doi:10.1016/j.jnucmat.2009.01.303

Thermo-oxidation and analysis of JET codeposits

A. A. Haasz (Corresponding Author), Jari Likonen, J. P. Coad, C. K. Tsui, J. W. Davis, A. M. Widdowson

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

8 Citations (Scopus)

Abstract

Following the thermo-oxidation study of D removal from JET divertor codeposits, post oxidation surface analyses were performed using SIMS, NRA and profilometry. The analysis confirms that the D content was reduced by at least an order of magnitude after 8-h oxidation at 623 K (350 °C) and 21 kPa (160 Torr) O₂ pressure – in agreement with TDS measurements. The codeposits studied contain Be and C. Those on the vertical tile surfaces have a duplex structure with a C-D rich layer on the surface and a Be–C layer underneath; during oxidation the outer layer is removed and the inner layer remains. Codeposits with low Be content from the shadowed area have single-layer structures; during oxidation their thicknesses were reduced by about an order of magnitude. For the JET codeposits studied (with Be/C up to ∼1) it appears that Be does not affect the oxidative removal of deuterium from the codeposit in a significant way.

Original language	English
Pages (from-to)	626-630
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	390-391
DOIs	https://doi.org/10.1016/j.jnucmat.2009.01.303
Publication status	Published - 2009
MoE publication type	A1 Journal article-refereed

Access to Document

10.1016/j.jnucmat.2009.01.303

Cite this

@article{7c7cdac93072428d9a3ac294f77474cd,

title = "Thermo-oxidation and analysis of JET codeposits",

abstract = "Following the thermo-oxidation study of D removal from JET divertor codeposits, post oxidation surface analyses were performed using SIMS, NRA and profilometry. The analysis confirms that the D content was reduced by at least an order of magnitude after 8-h oxidation at 623 K (350 °C) and 21 kPa (160 Torr) O2 pressure – in agreement with TDS measurements. The codeposits studied contain Be and C. Those on the vertical tile surfaces have a duplex structure with a C-D rich layer on the surface and a Be–C layer underneath; during oxidation the outer layer is removed and the inner layer remains. Codeposits with low Be content from the shadowed area have single-layer structures; during oxidation their thicknesses were reduced by about an order of magnitude. For the JET codeposits studied (with Be/C up to ∼1) it appears that Be does not affect the oxidative removal of deuterium from the codeposit in a significant way.",

author = "Haasz, {A. A.} and Jari Likonen and Coad, {J. P.} and Tsui, {C. K.} and Davis, {J. W.} and Widdowson, {A. M.}",

year = "2009",

doi = "10.1016/j.jnucmat.2009.01.303",

language = "English",

volume = "390-391",

pages = "626--630",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Thermo-oxidation and analysis of JET codeposits

AU - Haasz, A. A.

AU - Likonen, Jari

AU - Coad, J. P.

AU - Tsui, C. K.

AU - Davis, J. W.

AU - Widdowson, A. M.

PY - 2009

Y1 - 2009

N2 - Following the thermo-oxidation study of D removal from JET divertor codeposits, post oxidation surface analyses were performed using SIMS, NRA and profilometry. The analysis confirms that the D content was reduced by at least an order of magnitude after 8-h oxidation at 623 K (350 °C) and 21 kPa (160 Torr) O2 pressure – in agreement with TDS measurements. The codeposits studied contain Be and C. Those on the vertical tile surfaces have a duplex structure with a C-D rich layer on the surface and a Be–C layer underneath; during oxidation the outer layer is removed and the inner layer remains. Codeposits with low Be content from the shadowed area have single-layer structures; during oxidation their thicknesses were reduced by about an order of magnitude. For the JET codeposits studied (with Be/C up to ∼1) it appears that Be does not affect the oxidative removal of deuterium from the codeposit in a significant way.

AB - Following the thermo-oxidation study of D removal from JET divertor codeposits, post oxidation surface analyses were performed using SIMS, NRA and profilometry. The analysis confirms that the D content was reduced by at least an order of magnitude after 8-h oxidation at 623 K (350 °C) and 21 kPa (160 Torr) O2 pressure – in agreement with TDS measurements. The codeposits studied contain Be and C. Those on the vertical tile surfaces have a duplex structure with a C-D rich layer on the surface and a Be–C layer underneath; during oxidation the outer layer is removed and the inner layer remains. Codeposits with low Be content from the shadowed area have single-layer structures; during oxidation their thicknesses were reduced by about an order of magnitude. For the JET codeposits studied (with Be/C up to ∼1) it appears that Be does not affect the oxidative removal of deuterium from the codeposit in a significant way.

U2 - 10.1016/j.jnucmat.2009.01.303

DO - 10.1016/j.jnucmat.2009.01.303

M3 - Article

SN - 0022-3115

VL - 390-391

SP - 626

EP - 630

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Thermo-oxidation and analysis of JET codeposits

Abstract

Access to Document

Fingerprint

Cite this