Characterisation of divertor detachment onset in JET-ILW hydrogen, deuterium, tritium and deuterium-tritium low-confinement mode plasmas

被引：15

作者：

Groth, M. ^{[1
]}

Solokha, V. ^{[1
]}

Aleiferis, S. ^{[2
,3
]}

Brezinsek, S. ^{[4
]}

Brix, M. ^{[3
]}

Carvalho, I. S. ^{[5
]}

Carvalho, P. ^{[3
,5
]}

Corrigan, G. ^{[3
]}

Harting, D. ^{[4
]}

Horsten, N. ^{[1
,6
]}

Jepu, I. ^{[3
,7
]}

Karhunen, J. ^{[3
]}

Kirov, K. ^{[3
]}

Lomanowski, B. ^{[8
]}

Lawson, K. D. ^{[3
]}

Lowry, C. ^{[3
]}

Meigs, A. G. ^{[3
]}

Menmuir, S. ^{[3
]}

Pawelec, E. ^{[9
]}

Pereira, T. ^{[5
]}

Shaw, A. ^{[3
]}

Silburn, S. ^{[3
]}

Thomas, B. ^{[3
]}

Wiesen, S. ^{[4
]}

Boerner, P. ^{[4
]}

Borodin, D. ^{[4
]}

Jachmich, S. ^{[10
]}

Reiter, D. ^{[11
]}

Sergienko, G. ^{[4
]}

Stancar, Z. ^{[3
]}

Viola, B. ^{[3
]}

Beaumont, P. ^{[3
]}

Bernardo, J. ^{[3
]}

Coffey, I. ^{[3
]}

Conway, N. J. ^{[3
]}

de la Luna, E. ^{[12
]}

Douai, D. ^{[13
]}

Giroud, C. ^{[3
]}

Hillesheim, J. ^{[3
]}

Horvath, L. ^{[3
]}

Huber, A. ^{[4
]}

Lomas, P. ^{[3
]}

Maggi, C. F. ^{[3
]}

Maslov, M. ^{[3
]}

von Thun, C. Perez ^{[14
]}

Scully, S. ^{[3
]}

Vianello, N. ^{[15
]}

Wischmeier, M. ^{[16
]}

机构：

[1] Aalto Univ, Otakaari 1, Espoo 02150, Finland

[2] NCSR Demokritos, Inst Nucl & Particle Phys, Athens, Greece

[3] UKAEA, Culham Sci Ctr, Abingdon, Oxon, England

[4] Forschungszentrum Julich, Inst Energy & Climate Res Plasma Phys, Julich, Germany

[5] Univ Tecn Lisboa, Inst Plasmas & Fusao Nucl, Lisbon, Portugal

[6] Katholieke Univ Leuven, Leuven, Belgium

[7] Natl Inst Laser Plasma & Radiat Phys, Magurele, Romania

[8] Oak Ridge Natl Lab, Oak Ridge, TN USA

[9] Univ Opole, Opole, Poland

[10] ITER Org, St Paul Les Durance, France

[11] Heinrich Heine Univ Dusseldorf, Dusseldorf, Germany

[12] CIEMAT, Lab Nacl Fus, Madrid, Spain

[13] CEA, IRFM, F-13108 St Paul Les Durance, France

[14] Inst Plasma Phys & Laser Microfus IPPLM, Warsaw, Poland

[15] Univ Padua, Consorzio RFX, CNR, ENEA,INFN, Padua, Italy

[16] Max Planck Inst Plasma Phys, Garching, Germany

来源：

NUCLEAR MATERIALS AND ENERGY | 2023年 / 34卷

关键词：

Detachment; Hydrogen isotopes; JET; ITER-LIKE WALL; SIMULATIONS; PARTICLE; POWER;

D O I：

10.1016/j.nme.2022.101345

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Measurements of the ion currents to and plasma conditions at the low-field side (LFS) divertor target plate in low -confinement mode plasmas in the JET ITER-like wall materials configuration show that the core plasma density required to detach the LFS divertor plasma is independent of the hydrogenic species protium, deuterium and tritium, and a 40 %/60 % deuterium-tritium mixture. This observation applies to a divertor plasma configuration with the LFS strike line connected to the horizontal part of the LFS divertor chosen because of its superior diagnostic coverage. The finding is independent of the operational status of the JET cryogenic pump. The electron temperature (Te) at the LFS strike line was markedly reduced from 25 eV to 5 eV over a narrow range of increasing core plasma density, and observed to be between 2 eV and 3 eV at the onset of detachment. The electron density (ne) peaks across the LFS plasma when Te at the target plate is 1 eV, and spatially moves to the X -point for higher core densities. The density limit was found approximately 20 % higher in protium than in tritium and deuterium-tritium plasmas.

引用

页数：8

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