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Characteristic of a pdCu membrane as atomic hydrogen probe for QUEST

Masayuki Onaka / Ikuji Takagi / Taishi Kobayashi / Takayuki Sasaki / Arseniy Kuzmin / Hideki Zushi

A permeation probe is a useful device for detecting the atomic hydrogen flux to plasma-facing walls. Recently, we developed a new type of probe using 60Pd-40Cu alloy (PdCu) as the permeation material. The deuterium behaviors in PdCu samples were investigated using nuclear reaction analysis (NRA) and permeation observations, and the diffusion coefficient and recombination coefficients were determined from these observations. It was found that the sensitivity of a 0.02-mm-thick probe was as high as 0.5 below 473K and was independent of the incident flux. The response time at 473K was 0.41s and 1.3s under an incident flux of 1020m−2s−1 and 1019m−2s−1, respectively. Thus, we concluded that the new PdCu probe can effectively detect the incident atomic hydrogen with high sensitivity and a suitable response time.

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Characteristic of a pdCu membrane as atomic hydrogen probe for QUEST

Masayuki Onaka / Ikuji Takagi / Taishi Kobayashi / Takayuki Sasaki / Arseniy Kuzmin / Hideki Zushi

A permeation probe is a useful device for detecting the atomic hydrogen flux to plasma-facing walls. Recently, we developed a new type of probe using 60Pd-40Cu alloy (PdCu) as the permeation material. The deuterium behaviors in PdCu samples were investigated using nuclear reaction analysis (NRA) and permeation observations, and the diffusion coefficient and recombination coefficients were determined from these observations. It was found that the sensitivity of a 0.02-mm-thick probe was as high as 0.5 below 473K and was independent of the incident flux. The response time at 473K was 0.41s and 1.3s under an incident flux of 1020m−2s−1 and 1019m−2s−1, respectively. Thus, we concluded that the new PdCu probe can effectively detect the incident atomic hydrogen with high sensitivity and a suitable response time.

Characteristic of a pdCu membrane as atomic hydrogen probe for QUEST

Masayuki Onaka / Ikuji Takagi / Taishi Kobayashi / Takayuki Sasaki / Arseniy Kuzmin / Hideki Zushi

A permeation probe is a useful device for detecting the atomic hydrogen flux to plasma-facing walls. Recently, we developed a new type of probe using 60Pd-40Cu alloy (PdCu) as the permeation material. The deuterium behaviors in PdCu samples were investigated using nuclear reaction analysis (NRA) and permeation observations, and the diffusion coefficient and recombination coefficients were determined from these observations. It was found that the sensitivity of a 0.02-mm-thick probe was as high as 0.5 below 473K and was independent of the incident flux. The response time at 473K was 0.41s and 1.3s under an incident flux of 1020m−2s−1 and 1019m−2s−1, respectively. Thus, we concluded that the new PdCu probe can effectively detect the incident atomic hydrogen with high sensitivity and a suitable response time.

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Title:

Characteristic of a pdCu membrane as atomic hydrogen probe for QUEST

Contributors:

Masayuki Onaka (author) / Ikuji Takagi (author) / Taishi Kobayashi (author) / Takayuki Sasaki (author) / Arseniy Kuzmin (author) / Hideki Zushi (author)

Published in:

Nuclear Materials and Energy, Vol 9, Iss C, Pp 104-108 (2016)

Publication date:

2016

ISSN:

DOI:

https://doi.org/10.1016/j.nme.2016.09.001

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

Keywords:

Palladium alloy , Permeation , Hydrogen , Nuclear reaction analysis , Plasma-wall interaction , Diffusion , Nuclear engineering. Atomic power , TK9001-9401

Metadata by DOAJ is licensed under CC BY-SA 1.0

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