Impact of the JET ITER-like wall on H-mode plasma fueling

S. Wiesen; S. Brezinsek; M. Wischmeier; E. De La Luna; M. Groth; A. E. Järvinen; E. De La Cal; U. Losada; A. M. De Aguilera; L. Frassinetti; Y. Gao; C. Guillemaut; D. Harting; A. Meigs; K. Schmid; G. Sergienko

doi:10.1088/1741-4326/aa69dd

Impact of the JET ITER-like wall on H-mode plasma fueling

S. Wiesen
, S. Brezinsek
, M. Wischmeier
, E. De La Luna
, M. Groth
, A. E. Järvinen
, E. De La Cal
, U. Losada
, A. M. De Aguilera
, L. Frassinetti
, Y. Gao
, C. Guillemaut
, D. Harting
, A. Meigs
, K. Schmid
, G. Sergienko

Not published at VTT

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

16 Citations (Scopus)

Abstract

JET ITER-like wall (ILW) experiments show that the edge density evolution is strongly linked with the poloidal distribution of the ionization source. The fueling profile in the JET-ILW is more delocalized as compared to JET-C (JET with carbon-based plasma-facing components PFCs). Compared to JET-C the H-mode pedestal fueling cycle is dynamically influenced by a combination of plasma-wall interaction features, in particular: (1) edge-localized modes (ELMs) induced energetic particles are kinetically reflected on W divertor PFCs leading to distributed refueling away from the divertor depending on the divertor plasma configuration, (2) delayed molecular re-emission and outgassing of particles being trapped in W PFCs (bulk-W at the high field side and W-coated CFCs at the low field side) with different fuel content and (3) outgassing from Be co-deposits located on top of the high-field side baffle region shortly after the ELM. In view of the results of a set of well diagnosed series of JET-ILW type-I ELMy H-mode discharges with good statistics, the aforementioned effects are discussed in view of H-mode pedestal fueling capacity. The ongoing modelling activities with the focus on coupled core-edge plasma simulations and plasma-wall interaction are described and discussed also in view of possible code improvements required.

Original language	English
Article number	066024
Journal	Nuclear Fusion
Volume	57
Issue number	6
DOIs	https://doi.org/10.1088/1741-4326/aa69dd
Publication status	Published - 26 Apr 2017
MoE publication type	A1 Journal article-refereed

Funding

This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

Keywords

H-mode
integrated modelling
ITER-like wall
JET
pedestal fuelling
plasma-wall interaction

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1088/1741-4326/aa69dd

Cite this

Wiesen, S., Brezinsek, S., Wischmeier, M., De La Luna, E., Groth, M., Järvinen, A. E., De La Cal, E., Losada, U., De Aguilera, A. M., Frassinetti, L., Gao, Y., Guillemaut, C., Harting, D., Meigs, A., Schmid, K., & Sergienko, G. (2017). Impact of the JET ITER-like wall on H-mode plasma fueling. Nuclear Fusion, 57(6), Article 066024. https://doi.org/10.1088/1741-4326/aa69dd

@article{b9255553d7a648e29f97ff272fa60936,

title = "Impact of the JET ITER-like wall on H-mode plasma fueling",

abstract = "JET ITER-like wall (ILW) experiments show that the edge density evolution is strongly linked with the poloidal distribution of the ionization source. The fueling profile in the JET-ILW is more delocalized as compared to JET-C (JET with carbon-based plasma-facing components PFCs). Compared to JET-C the H-mode pedestal fueling cycle is dynamically influenced by a combination of plasma-wall interaction features, in particular: (1) edge-localized modes (ELMs) induced energetic particles are kinetically reflected on W divertor PFCs leading to distributed refueling away from the divertor depending on the divertor plasma configuration, (2) delayed molecular re-emission and outgassing of particles being trapped in W PFCs (bulk-W at the high field side and W-coated CFCs at the low field side) with different fuel content and (3) outgassing from Be co-deposits located on top of the high-field side baffle region shortly after the ELM. In view of the results of a set of well diagnosed series of JET-ILW type-I ELMy H-mode discharges with good statistics, the aforementioned effects are discussed in view of H-mode pedestal fueling capacity. The ongoing modelling activities with the focus on coupled core-edge plasma simulations and plasma-wall interaction are described and discussed also in view of possible code improvements required.",

keywords = "H-mode, integrated modelling, ITER-like wall, JET, pedestal fuelling, plasma-wall interaction",

author = "S. Wiesen and S. Brezinsek and M. Wischmeier and \{De La Luna\}, E. and M. Groth and J{\"a}rvinen, \{A. E.\} and \{De La Cal\}, E. and U. Losada and \{De Aguilera\}, \{A. M.\} and L. Frassinetti and Y. Gao and C. Guillemaut and D. Harting and A. Meigs and K. Schmid and G. Sergienko",

note = "Funding Information: This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. Publisher Copyright: {\textcopyright} 2017 Forschungszentrum J{\"u}lich GmbH.",

year = "2017",

month = apr,

day = "26",

doi = "10.1088/1741-4326/aa69dd",

language = "English",

volume = "57",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "Institute of Physics IOP",

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}

TY - JOUR

T1 - Impact of the JET ITER-like wall on H-mode plasma fueling

AU - Wiesen, S.

AU - Brezinsek, S.

AU - Wischmeier, M.

AU - De La Luna, E.

AU - Groth, M.

AU - Järvinen, A. E.

AU - De La Cal, E.

AU - Losada, U.

AU - De Aguilera, A. M.

AU - Frassinetti, L.

AU - Gao, Y.

AU - Guillemaut, C.

AU - Harting, D.

AU - Meigs, A.

AU - Schmid, K.

AU - Sergienko, G.

N1 - Funding Information: This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. Publisher Copyright: © 2017 Forschungszentrum Jülich GmbH.

PY - 2017/4/26

Y1 - 2017/4/26

N2 - JET ITER-like wall (ILW) experiments show that the edge density evolution is strongly linked with the poloidal distribution of the ionization source. The fueling profile in the JET-ILW is more delocalized as compared to JET-C (JET with carbon-based plasma-facing components PFCs). Compared to JET-C the H-mode pedestal fueling cycle is dynamically influenced by a combination of plasma-wall interaction features, in particular: (1) edge-localized modes (ELMs) induced energetic particles are kinetically reflected on W divertor PFCs leading to distributed refueling away from the divertor depending on the divertor plasma configuration, (2) delayed molecular re-emission and outgassing of particles being trapped in W PFCs (bulk-W at the high field side and W-coated CFCs at the low field side) with different fuel content and (3) outgassing from Be co-deposits located on top of the high-field side baffle region shortly after the ELM. In view of the results of a set of well diagnosed series of JET-ILW type-I ELMy H-mode discharges with good statistics, the aforementioned effects are discussed in view of H-mode pedestal fueling capacity. The ongoing modelling activities with the focus on coupled core-edge plasma simulations and plasma-wall interaction are described and discussed also in view of possible code improvements required.

AB - JET ITER-like wall (ILW) experiments show that the edge density evolution is strongly linked with the poloidal distribution of the ionization source. The fueling profile in the JET-ILW is more delocalized as compared to JET-C (JET with carbon-based plasma-facing components PFCs). Compared to JET-C the H-mode pedestal fueling cycle is dynamically influenced by a combination of plasma-wall interaction features, in particular: (1) edge-localized modes (ELMs) induced energetic particles are kinetically reflected on W divertor PFCs leading to distributed refueling away from the divertor depending on the divertor plasma configuration, (2) delayed molecular re-emission and outgassing of particles being trapped in W PFCs (bulk-W at the high field side and W-coated CFCs at the low field side) with different fuel content and (3) outgassing from Be co-deposits located on top of the high-field side baffle region shortly after the ELM. In view of the results of a set of well diagnosed series of JET-ILW type-I ELMy H-mode discharges with good statistics, the aforementioned effects are discussed in view of H-mode pedestal fueling capacity. The ongoing modelling activities with the focus on coupled core-edge plasma simulations and plasma-wall interaction are described and discussed also in view of possible code improvements required.

KW - H-mode

KW - integrated modelling

KW - ITER-like wall

KW - JET

KW - pedestal fuelling

KW - plasma-wall interaction

UR - https://www.scopus.com/pages/publications/85019398296

U2 - 10.1088/1741-4326/aa69dd

DO - 10.1088/1741-4326/aa69dd

M3 - Article

AN - SCOPUS:85019398296

SN - 0029-5515

VL - 57

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 6

M1 - 066024

ER -

Impact of the JET ITER-like wall on H-mode plasma fueling

Abstract

Funding

Keywords

UN SDGs

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