Measuring the isotope effect on the gross beryllium erosion in JET

被引：10

作者：

de la Cal, E. ^{[1
]}

Borodin, D. ^{[2
]}

Borodkina, I ^{[2
]}

Douai, D. ^{[3
]}

Pawelec, E. ^{[4
]}

Shaw, A. ^{[5
]}

Silburn, S. ^{[5
]}

Balboa, I ^{[5
]}

Brezinsek, S. ^{[2
]}

Carvalho, P. ^{[5
]}

Dittmar, T. ^{[2
]}

Huber, A. ^{[5
]}

Huber, V ^{[5
]}

Karhunen, J. ^{[6
]}

Losada, U. ^{[1
,7
]}

Manzanares, A. ^{[1
]}

Romazanov, J. ^{[2
]}

Tookey, A. ^{[5
]}

机构：

[1] CIEMAT, Lab Nacl Fus, Av Complutense 40, E-28040 Madrid, Spain

[2] Forschungszentrum Julich, Inst Energ & Klimaforsch Plasmaphys, D-52425 Julich, Germany

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

[4] Univ Opole, Inst Phys, Oleska 48, Opole, Poland

[5] CCFE Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[6] Aalto Univ, Dept Appl Phys, Espoo 02150, Finland

[7] Auburn Univ, Auburn, AL 36849 USA

来源：

NUCLEAR FUSION | 2022年 / 62卷 / 12期

关键词：

beryllium; erosion; isotope; JET; spectroscopy; limiter; sputtering; ILW; DEPOSITION; DIVERTOR; WALL;

D O I：

10.1088/1741-4326/ac8aae

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The isotope effect, hydrogen (H) versus deuterium (D), on the gross beryllium (Be) erosion yield has been measured in ohmic limiter plasmas in JET tokamak by spectroscopic means. A simplified method to extract the effective sputtering yield from the quotient of the radiances of the D- alpha or D- gamma and the Be II lines at 527 nm was applied. A clear isotope effect has been found, the erosion yield of D being about a factor of 2 larger compared to H in the whole explored plasma density range. This is in agreement with physical sputtering data obtained with H+ and D+ ion beams and also with material surface computer simulations. The already published contribution of chemically assisted physical sputtering has been also identified here. Currently the study is being extended to tritium (T) and D-T plasmas and the effect of helium mixtures.

引用

页数：9

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