Academic Journal
Ammonia production in a dual crossed atom beam experiment
| Title: | Ammonia production in a dual crossed atom beam experiment |
|---|---|
| Authors: | R. Zaplotnik, A. Drenik, A. Vesel, M. Mozetič |
| Source: | Nuclear Fusion, Vol 63, Iss 6, p 066035 (2023) |
| Publisher Information: | IOP Publishing, 2023. |
| Publication Year: | 2023 |
| Collection: | LCC:Nuclear and particle physics. Atomic energy. Radioactivity |
| Subject Terms: | divertor, ammonia production, fusion relevant materials, dual atom crossed beam, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798 |
| More Details: | Production of ammonia by surface reactions of H and N atoms on surfaces not wetted by partially ionized plasma may represent an important technological issue in fusion reactors where puffing nitrogen is employed to cool plasma in the divertor region. The H and N atoms are likely to interact on such surfaces forming NH3 molecules. The interaction efficiency was studied in a laboratory setup consisting of two separate sources of either N or H atoms. Both sources enabled experiments with atoms at room temperature in the range of H-atom density of the order of 10 ^21 m ^−3 and N-atom density of the order of 10 ^20 m ^−3 . The production of ammonia was measured with a calibrated residual gas analyser. The production depended on the fluxes of both atoms onto the surface of selected materials. As a general rule, the higher H-atom flux at a constant N-atom flux caused an increase in ammonia production. The highest efficiency of up to 50% was found for nickel. It was up to 30% for tungsten, whereas for P92 alloy, it was up to about 20%. The accuracy of these results is within about ±20% of the measured values. Methods for suppressing ammonia formation in fusion reactors will have to be invented in order to enable appropriate long-term operation. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 1741-4326 0029-5515 |
| Relation: | https://doaj.org/toc/0029-5515 |
| DOI: | 10.1088/1741-4326/acd1a1 |
| Access URL: | https://doaj.org/article/03023bc6e1b74ed9a61487041e206f16 |
| Accession Number: | edsdoj.03023bc6e1b74ed9a61487041e206f16 |
| Database: | Directory of Open Access Journals |
| ISSN: | 17414326 00295515 |
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| DOI: | 10.1088/1741-4326/acd1a1 |
| Published in: | Nuclear Fusion |
| Language: | English |