Abstract
The CAPS contribution to the total Be erosion was investigated following the 2014 experiment in D plasma [9]. Be CAPS magnitude does not dependent on H/D isotope. Full suppression at limiter both in D and H plasmas occurs at Tsurf~550°C. This supports the hypothesis that D or H outgassing is the determining factor. Larger fraction of BeH to atomic release in H plasma than BeD in the D plasma is observed. The isotopic effect for total Be erosion (largest for T, smallest for H) is shown by the S/XB approach applied to the combined data set from the selected sightline and ROIs from the 2D cameras with filters. The uncertainties in plasma parameters, geometry-dependent factors ζi for effective erosion yields and strong role of Be self-sputtering lead to large scattering of the data - numerical simulations are required for precise determination of the PS and CAPS yields. The experiments have allowed to obtain systematic validation material for Be migration at various Tsurf(and other parameters) in D and H plasmas.
| Original language | English |
|---|---|
| Title of host publication | 47th EPS Conference on Plasma Physics, EPS 2021 |
| Publisher | European Physical Society (EPS) |
| Pages | 201-204 |
| Number of pages | 4 |
| ISBN (Electronic) | 9781713837046 |
| State | Published - 2021 |
| Externally published | Yes |
| Event | 47th EPS Conference on Plasma Physics, EPS 2021 - Sitges, Spain Duration: 21 Jun 2021 → 25 Jun 2021 |
Publication series
| Name | 47th EPS Conference on Plasma Physics, EPS 2021 |
|---|---|
| Volume | 2021-June |
Conference
| Conference | 47th EPS Conference on Plasma Physics, EPS 2021 |
|---|---|
| Country/Territory | Spain |
| City | Sitges |
| Period | 21/06/21 → 25/06/21 |
Bibliographical note
Publisher Copyright:© 2021 47th EPS Conference on Plasma Physics, EPS 2021. All right reserved.