Initial boronization of PBX-M using ablation of solid boronized probes
| العنوان: | Initial boronization of PBX-M using ablation of solid boronized probes |
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| المؤلفون: | Kugel, H.W., Hirooka, Y., Kaita, R., Kaye, S., Khandagle, M. . Inst. of Plasma and Fusion Research), Timberlake, J., Bell, R., England, A., Isler, R., Okabayashi, M., Paul, S., Takahashi, H., Tighe, W., von Goeler, S., Post-Zwicker, A.P. ), Jones, S. ) |
| سنة النشر: | 2008 |
| المجموعة: | SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
| مصطلحات موضوعية: | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY, BORON CARBIDES, DEPOSITION, PLASMA IMPURITIES, CONTROL, ABLATION, BORON, COMPACT IGNITION TOKAMAK, GRAPHITE, PROBES, BORON COMPOUNDS, CARBIDES, CARBON, CARBON COMPOUNDS, CLOSED PLASMA DEVICES, ELEMENTAL MINERALS, ELEMENTS, IMPURITIES, MINERALS, NONMETALS, SEMIMETALS, THERMONUCLEAR DEVICES, THERMONUCLEAR REACTORS, TOKAMAK DEVICES, TOKAMAK TYPE REACTORS |
| الوصف: | The initial boronization of PBX-M was performed using the sequential ablation of two types of solid target probes. Probe-1 in a mushroom shape consisted of a 10.7% boronized 2-D C-C composite containing 3.6 g of boron in a B[sub 4]C binder. Probe-2 in a rectangular shape consisted of an 86% boronized graphite felt composite containing 19.5 g of 40 [mu] boron particles. After boronization with Probe-1, the loop voltage during 1 MW neutral beam heated plasmas decreased 27% and volt-sec consumption decreased 20%. Strong peripheral spectral lines from low-Z elements decreased by factors of about 5. The central oxygen density decreased 15--20%. The total radiated power during neutral beam injection decreased by 43%. Probe-2 boronization exhibited improved operating conditions similar to Probe-1, but for some parameters, a smaller percentage change occurred due to the residual boron from the previous boronization using Probe-1. The ablation rates of both probes were consistent with front face temperatures at or slightly above the boron melting point. These results confirm the effectiveness of the solid target boronization (STB) technique as a real-time impurity control method for replenishing boron depositions without the use of hazardous borane compounds. |
| نوع الوثيقة: | other/unknown material |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| Relation: | http://www.osti.gov/servlets/purl/7368683; https://www.osti.gov/biblio/7368683; https://doi.org/10.2172/7368683 |
| DOI: | 10.2172/7368683 |
| الاتاحة: | http://www.osti.gov/servlets/purl/7368683 https://www.osti.gov/biblio/7368683 https://doi.org/10.2172/7368683 |
| رقم الانضمام: | edsbas.F020E01A |
| قاعدة البيانات: | BASE |
| DOI: | 10.2172/7368683 |
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