The influence of D2 pressure on D retention and release from Be co-deposits
Beryllium co-deposit thermal desorption studies are reported that focus on the effect of D2pressure during layer formation, as pressure has been linked in prior work to the formation of a high-retention-capacity sharp-release-feature. A pressure range from 0.3 to 13.3 Pa is explored. Additional insi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-09-01
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| Series: | Nuclear Materials and Energy |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S235217912100096X |
| _version_ | 1818584491275321344 |
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| author | M.J. Baldwin A. Založnik M.J. Simmonds G. De Temmerman R.P. Doerner |
| author_facet | M.J. Baldwin A. Založnik M.J. Simmonds G. De Temmerman R.P. Doerner |
| author_sort | M.J. Baldwin |
| collection | DOAJ |
| description | Beryllium co-deposit thermal desorption studies are reported that focus on the effect of D2pressure during layer formation, as pressure has been linked in prior work to the formation of a high-retention-capacity sharp-release-feature. A pressure range from 0.3 to 13.3 Pa is explored. Additional insight into what drives the formation of T0is established through co-deposit formation parameter variations including deposition temperature spanning 373 K to 608 K, and ion impact energy in the range 10–100 eV. It is found that the formation of the sharp release feature exhibits a multi-parameter dependence, but is predominately favoured by low deposition temperature, higher D2pressure, and to a small degree, increased ion impact energy, during deposition. TESSIM simulations of the D2thermal release at the ITER bake temperatures of Tb1(513 K) and Tb2(623 K), show that the best efficacy for D removal (defined as the ratio of post to pre bake inventory) is found when the sharp release feature is present. However, when this feature is present, the total retained D inventory tends to be significantly increased. |
| first_indexed | 2024-12-16T08:22:01Z |
| format | Article |
| id | doaj.art-1cfaa3f991e24c44b947124dea2a7559 |
| institution | Directory Open Access Journal |
| issn | 2352-1791 |
| language | English |
| last_indexed | 2024-12-16T08:22:01Z |
| publishDate | 2021-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj.art-1cfaa3f991e24c44b947124dea2a75592022-12-21T22:38:05ZengElsevierNuclear Materials and Energy2352-17912021-09-0128101023The influence of D2 pressure on D retention and release from Be co-depositsM.J. Baldwin0A. Založnik1M.J. Simmonds2G. De Temmerman3R.P. Doerner4Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USA; Corresponding author.Center for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USACenter for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USAZenon Research, MINES ParisTech, Université PSL, Institut des Hautes Etudes pour l’Innovation et l’Entrepreneuriat (IHEIE), 75006 Paris, FranceCenter for Energy Research, University of California at San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0417, USABeryllium co-deposit thermal desorption studies are reported that focus on the effect of D2pressure during layer formation, as pressure has been linked in prior work to the formation of a high-retention-capacity sharp-release-feature. A pressure range from 0.3 to 13.3 Pa is explored. Additional insight into what drives the formation of T0is established through co-deposit formation parameter variations including deposition temperature spanning 373 K to 608 K, and ion impact energy in the range 10–100 eV. It is found that the formation of the sharp release feature exhibits a multi-parameter dependence, but is predominately favoured by low deposition temperature, higher D2pressure, and to a small degree, increased ion impact energy, during deposition. TESSIM simulations of the D2thermal release at the ITER bake temperatures of Tb1(513 K) and Tb2(623 K), show that the best efficacy for D removal (defined as the ratio of post to pre bake inventory) is found when the sharp release feature is present. However, when this feature is present, the total retained D inventory tends to be significantly increased.http://www.sciencedirect.com/science/article/pii/S235217912100096XBerylliumCo-depositsRetentionThermal desorptionPisces |
| spellingShingle | M.J. Baldwin A. Založnik M.J. Simmonds G. De Temmerman R.P. Doerner The influence of D2 pressure on D retention and release from Be co-deposits Nuclear Materials and Energy Beryllium Co-deposits Retention Thermal desorption Pisces |
| title | The influence of D2 pressure on D retention and release from Be co-deposits |
| title_full | The influence of D2 pressure on D retention and release from Be co-deposits |
| title_fullStr | The influence of D2 pressure on D retention and release from Be co-deposits |
| title_full_unstemmed | The influence of D2 pressure on D retention and release from Be co-deposits |
| title_short | The influence of D2 pressure on D retention and release from Be co-deposits |
| title_sort | influence of d2 pressure on d retention and release from be co deposits |
| topic | Beryllium Co-deposits Retention Thermal desorption Pisces |
| url | http://www.sciencedirect.com/science/article/pii/S235217912100096X |
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