Studies of impurity migration in TEXTOR by local tracer injection

A. Kirschner; P. Wienhold; D. Borodin; C. Björkas; O. Van Hoey; D. Matveev; S. Brezinsek; A. Kreter; M. Laengner; K. Ohya; V. Philipps; A. Pospieszczyk; U. Samm; B. Schweer

doi:10.1016/j.jnucmat.2013.01.153

Studies of impurity migration in TEXTOR by local tracer injection

A. Kirschner
, P. Wienhold
, D. Borodin
, C. Björkas
, O. Van Hoey
, D. Matveev
, S. Brezinsek
, A. Kreter
, M. Laengner
, K. Ohya
, V. Philipps
, A. Pospieszczyk
, U. Samm
, B. Schweer

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

10 Scopus citations

Abstract

Tracer experiments have been carried out by injection ¹³C marked methane through test limiters exposed to the scrape-off-layer in TEXTOR. The influence of impact energy and flux on depositing ¹³C species has been studied. One experiment has been performed with biased test limiter (-300 V) in order to increase energy of positively charged ions and the other one with 10 times reduced ¹³CH₄ injection rate compared to previously used injection rate. Biasing of the test limiter increases the resulting ¹³C deposition by a factor of ∼6 - post-mortem analysis yields a ¹³C deposition efficiency of ∼1.7% compared to ∼0.3% without biasing. Reducing the injection rate increases ¹³C deposition efficiency to ∼0.7%, which is more than two times larger compared to experiments with previously used injection rate. ERO modelling shows that enhanced re-erosion of redeposits is still necessary to reproduce measured ¹³C deposition efficiencies.

Original language	English
Pages (from-to)	S723-S726
Journal	Journal of Nuclear Materials
Volume	438
Issue number	SUPPL
DOIs	https://doi.org/10.1016/j.jnucmat.2013.01.153
State	Published - 2013
Externally published	Yes

Bibliographical note

Funding Information:
This work, supported by the European Communities under the contract of Association between EURATOM/FZJ, was carried out within the framework of EFDA. The views and opinions expressed herein do not necessarily reflect those of the European Commission. CPU time for computations has been provided by JSC (Jülich Supercomputer Centre).

Funding

This work, supported by the European Communities under the contract of Association between EURATOM/FZJ, was carried out within the framework of EFDA. The views and opinions expressed herein do not necessarily reflect those of the European Commission. CPU time for computations has been provided by JSC (Jülich Supercomputer Centre).

Funders
FZJ
H2020 Euratom

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@article{9d37a27bba8e46d1ab8a04dcec317761,

title = "Studies of impurity migration in TEXTOR by local tracer injection",

abstract = "Tracer experiments have been carried out by injection 13C marked methane through test limiters exposed to the scrape-off-layer in TEXTOR. The influence of impact energy and flux on depositing 13C species has been studied. One experiment has been performed with biased test limiter (-300 V) in order to increase energy of positively charged ions and the other one with 10 times reduced 13CH4 injection rate compared to previously used injection rate. Biasing of the test limiter increases the resulting 13C deposition by a factor of ∼6 - post-mortem analysis yields a 13C deposition efficiency of ∼1.7\% compared to ∼0.3\% without biasing. Reducing the injection rate increases 13C deposition efficiency to ∼0.7\%, which is more than two times larger compared to experiments with previously used injection rate. ERO modelling shows that enhanced re-erosion of redeposits is still necessary to reproduce measured 13C deposition efficiencies.",

author = "A. Kirschner and P. Wienhold and D. Borodin and C. Bj{\"o}rkas and \{Van Hoey\}, O. and D. Matveev and S. Brezinsek and A. Kreter and M. Laengner and K. Ohya and V. Philipps and A. Pospieszczyk and U. Samm and B. Schweer",

note = "Funding Information: This work, supported by the European Communities under the contract of Association between EURATOM/FZJ, was carried out within the framework of EFDA. The views and opinions expressed herein do not necessarily reflect those of the European Commission. CPU time for computations has been provided by JSC (J{\"u}lich Supercomputer Centre).",

year = "2013",

doi = "10.1016/j.jnucmat.2013.01.153",

language = "אנגלית",

volume = "438",

pages = "S723--S726",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

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AU - Kirschner, A.

AU - Wienhold, P.

AU - Borodin, D.

AU - Björkas, C.

AU - Van Hoey, O.

AU - Matveev, D.

AU - Brezinsek, S.

AU - Kreter, A.

AU - Laengner, M.

AU - Ohya, K.

AU - Philipps, V.

AU - Pospieszczyk, A.

AU - Samm, U.

AU - Schweer, B.

N1 - Funding Information: This work, supported by the European Communities under the contract of Association between EURATOM/FZJ, was carried out within the framework of EFDA. The views and opinions expressed herein do not necessarily reflect those of the European Commission. CPU time for computations has been provided by JSC (Jülich Supercomputer Centre).

PY - 2013

Y1 - 2013

N2 - Tracer experiments have been carried out by injection 13C marked methane through test limiters exposed to the scrape-off-layer in TEXTOR. The influence of impact energy and flux on depositing 13C species has been studied. One experiment has been performed with biased test limiter (-300 V) in order to increase energy of positively charged ions and the other one with 10 times reduced 13CH4 injection rate compared to previously used injection rate. Biasing of the test limiter increases the resulting 13C deposition by a factor of ∼6 - post-mortem analysis yields a 13C deposition efficiency of ∼1.7% compared to ∼0.3% without biasing. Reducing the injection rate increases 13C deposition efficiency to ∼0.7%, which is more than two times larger compared to experiments with previously used injection rate. ERO modelling shows that enhanced re-erosion of redeposits is still necessary to reproduce measured 13C deposition efficiencies.

AB - Tracer experiments have been carried out by injection 13C marked methane through test limiters exposed to the scrape-off-layer in TEXTOR. The influence of impact energy and flux on depositing 13C species has been studied. One experiment has been performed with biased test limiter (-300 V) in order to increase energy of positively charged ions and the other one with 10 times reduced 13CH4 injection rate compared to previously used injection rate. Biasing of the test limiter increases the resulting 13C deposition by a factor of ∼6 - post-mortem analysis yields a 13C deposition efficiency of ∼1.7% compared to ∼0.3% without biasing. Reducing the injection rate increases 13C deposition efficiency to ∼0.7%, which is more than two times larger compared to experiments with previously used injection rate. ERO modelling shows that enhanced re-erosion of redeposits is still necessary to reproduce measured 13C deposition efficiencies.

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SP - S723-S726

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

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Studies of impurity migration in TEXTOR by local tracer injection

Abstract

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