Studies of dust from JET with the ITER-Like Wall: Composition and internal structure

TY - JOUR

T1 - Studies of dust from JET with the ITER-Like Wall

T2 - Composition and internal structure

AU - Fortuna-Zaleśna, E.

AU - Grzonka, J.

AU - Rubel, M.

AU - Garcia-Carrasco, A.

AU - Widdowson, A.

AU - Baron-Wiechec, A.

AU - Ciupiński, L.

AU - JET Contributors, Contributors

N1 - Publisher Copyright: © 2016

PY - 2017/8

Y1 - 2017/8

N2 - Results are presented for the dust survey performed at JET after the second experimental campaign with the ITER-Like Wall: 2013–2014. Samples were collected on adhesive stickers from several different positions in the divertor both on the tiles and on the divertor carrier. Brittle dust-forming deposits on test mirrors from the inner divertor wall were also studied. Comprehensive characterization accomplished by a wide range of high-resolution microscopy techniques, including focused ion beam, has led to the identification of several classes of particles: (i) beryllium flakes originating either from the Be coatings from the inner wall cladding or Be-rich mixed co-deposits resulting from material migration; (ii) beryllium droplets and splashes; (iii) tungsten and nickel-rich (from Inconel) droplets; (iv) mixed material layers with a various content of small (8–200 nm) W-Mo and Ni-based debris. A significant content of nitrogen from plasma edge cooling has been identified in all types of co-deposits. A comparison between particles collected after the first and second experimental campaign is also presented and discussed.

AB - Results are presented for the dust survey performed at JET after the second experimental campaign with the ITER-Like Wall: 2013–2014. Samples were collected on adhesive stickers from several different positions in the divertor both on the tiles and on the divertor carrier. Brittle dust-forming deposits on test mirrors from the inner divertor wall were also studied. Comprehensive characterization accomplished by a wide range of high-resolution microscopy techniques, including focused ion beam, has led to the identification of several classes of particles: (i) beryllium flakes originating either from the Be coatings from the inner wall cladding or Be-rich mixed co-deposits resulting from material migration; (ii) beryllium droplets and splashes; (iii) tungsten and nickel-rich (from Inconel) droplets; (iv) mixed material layers with a various content of small (8–200 nm) W-Mo and Ni-based debris. A significant content of nitrogen from plasma edge cooling has been identified in all types of co-deposits. A comparison between particles collected after the first and second experimental campaign is also presented and discussed.

KW - Beryllium

KW - Dust

KW - ITER-Like Wall

KW - JET

KW - Material mixing

KW - Tungsten

UR - http://www.scopus.com/inward/record.url?scp=85010977239&partnerID=8YFLogxK

U2 - 10.1016/j.nme.2016.11.027

DO - 10.1016/j.nme.2016.11.027

M3 - 文章

AN - SCOPUS:85010977239

SN - 2352-1791

VL - 12

SP - 582

EP - 587

JO - Nuclear Materials and Energy

JF - Nuclear Materials and Energy

ER -