Deuterium retention in two types of polycrystalline tungsten was studied as a function of ion fluence, irradiation temperature and ion energy. Fluence dependence: D retention at 300 K tends to saturate in both Rembar and Plansee PCW. At 500 K, D retention in the Plansee PCW increases with increasing ion fluence, similar to previous results for Rembar tungsten. Even at a fluence of 8×10^25 D+/m2, no sign of saturation was observed. Temperature dependence: D retention in Plansee PCW decreases with increasing irradiation temperature (300 - 500 K). Energy dependence: varying the D+ energy from 100 to 500 eV/D+ plays a minor role in D retention in W, suggesting that D retention depends more on the W structure, irradiation temperature and fluence, rather than on the ion energy when the energy is below the displacement threshold.
| Identifer | oai:union.ndltd.org:TORONTO/oai:tspace.library.utoronto.ca:1807/18964 |
| Date | 16 February 2010 |
| Creators | Tian, Zhe |
| Contributors | Haasz, Anthony A. |
| Source Sets | University of Toronto |
| Language | en_ca |
| Detected Language | English |
| Type | Thesis |
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