کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1569667 | 999931 | 2007 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrogen and helium trapping in tungsten under single and sequential irradiations
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Hydrogen and helium trapping in tungsten under single and sequential irradiations Hydrogen and helium trapping in tungsten under single and sequential irradiations](/preview/png/1569667.png)
چکیده انگلیسی
The trapping of hydrogen and helium in polycrystalline tungsten irradiated with 500Â eV He+, H+ and D+ ions, individually or sequentially, has been measured by thermal desorption spectroscopy. Specimens irradiated with 500Â eV He+ at 300Â K show three He release peaks in the vicinity of â¼500, â¼1000, and â¼1200Â K. The helium is thought to form He vacancy complexes or bubbles. Increasing the specimen temperature to 700Â K does not significantly affect the trapping behavior of He. Sequential He+-D+ irradiation at 300Â K results in the elimination of He release above 800Â K. Instead, both D and He were released in the range 400-800Â K. This is interpreted as interstitial D and He released from the near surface. Sequential He+-D+ irradiation at 700Â K resulted in a reduced single He peak at â¼1000Â K with very little release observed below 800Â K; no D was trapped for irradiations at 700Â K. Sequential D+-He+ irradiations at 300Â K show that He trapping occurs in much the same manner as for the He+-only case while D retention is reduced at the near surface. Sequential D+-He+ irradiations at 700Â K indicate that pre-irradiation with D+ has little or no effect on the subsequent trapping behavior of He.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 360, Issue 2, 1 February 2007, Pages 196-207
Journal: Journal of Nuclear Materials - Volume 360, Issue 2, 1 February 2007, Pages 196-207
نویسندگان
H.T. Lee, A.A. Haasz, J.W. Davis, R.G. Macaulay-Newcombe,