Outgassing from and deuterium retention in beryllium and Be/C mixed-material plasma-facing components

Doerner, R.; Conn, R.W.; Luckhardt, S.; Sze, F. C.; Won, J.

doi:10.1016/s0920-3796(00)00421-x

Cited by 8 publications

(8 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The value of γ = 1306 ± 190 K yields an activation energy of 11.5 ± 0.15 kJ/mol and agrees relatively well with the desorption energy of 14.4 kJ/mol for press-sintered beryllium exposed to deuterium plasma [26], and that for data obtained in [16] for co-deposited beryllium layers.…”

Section: Mechanisms That Affect Retention In Co-depositssupporting

confidence: 79%

An empirical scaling for deuterium retention in co-deposited beryllium layers

et al. 2008

View full text Add to dashboard Cite

Abstract.Different mechanisms will contribute to tritium retention in ITER, amongst which co-deposition with materials from the plasma-facing components may be the main contributor. A systematic study of the influence of the deposition conditions (substrate temperature, deposition rate, energy of the incident particles) on the deuterium retention in co-deposited beryllium layers has been carried out in PISCES-B. The mechanism by which deuterium co-deposits with beryllium appears to be a combination of co-deposition and implantation, with a decreased retention for increased deposition rate and an increased retention for increased incident deuterium particles energy. A scaling equation is developed, providing a method to predict the retention in Be codeposits formed in PISCES-B as a function of the layer formation conditions. Using this equation, previously published data on retention in Be co-deposits are re-examined and relatively good agreement is found with the prediction of the scaling equation.

show abstract

Section: Mechanisms That Affect Retention In Co-depositssupporting

confidence: 79%

An empirical scaling for deuterium retention in co-deposited beryllium layers

et al. 2008

View full text Add to dashboard Cite

show abstract

“…2, a small amount of D 2 begins being released when the sample is heated above 330 K, but the primary deuterium release peak occurs at $540 K. The temperature of this release peak agrees with the small lowtemperature release peak observed from beryllium targets exposed to deuterium plasma bombardment at room temperature [13] indicating that small amounts of BeD 2 may have formed in the plasma-exposed surfaces. Of course, after higher temperature ($725 K) plasma exposures this release peak is not observed [13]. A deuterium molecule release peak, at a similar temperature, is also observed from beryllium codeposited layers [14] that are deposited at temperatures less than the decomposition temperature of BeD 2 .…”

Section: Signatures Of Beryllium Hydride Standardssupporting

confidence: 74%

The role of beryllium deuteride in plasma-beryllium interactions

Doerner

Baldwin

Buchenauer

et al. 2009

Journal of Nuclear Materials

View full text Add to dashboard Cite

“…In this regard it is further noted that desorption trends in Fig. 5 are not reminiscent of pure beryllium [27] or beryllium codeposits [28] but some similarity is evident on comparison with TDS studies of doped graphites [29]. In [29], D þ 3 ion-implanted doped graphites show a similar reduced onset temperature for D 2 release and similar desorption profiles compared to undoped specimens.…”

Section: Discussionmentioning

confidence: 67%