التفاصيل البيبلوغرافية
| العنوان: |
Design and characterization of a prototype divertor viewing infrared video bolometer for NSTX-U. |
| المؤلفون: |
van Eden, G. G., Reinke, M. L., Peterson, B. J., Gray, T. K., Delgado-Aparicio, L. F., Jaworski, M. A., Lore, J., Mukai, K., Sano, R., Pandya, S. N., Morgan, T. W. |
| المصدر: |
Review of Scientific Instruments; Nov2016, Vol. 87 Issue 11, p11D402-1-11D402-4, 4p, 1 Diagram, 1 Chart, 2 Graphs |
| مصطلحات موضوعية: |
PROTOTYPES, DIVERTERS (Electronics), BOLOMETERS, INFRARED detectors, INDUCTIVELY coupled plasma atomic emission spectrometry, THERMAL properties |
| مستخلص: |
The InfraRed Video Bolometer (IRVB) is a powerful tool to measure radiated power in magnetically confined plasmas due to its ability to obtain 2D images of plasma emission using a technique that is compatible with the fusion nuclear environment. A prototype IRVB has been developed and installed on NSTX-U to view the lower divertor. The IRVB is a pinhole camera which images radiation from the plasma onto a 2.5 μm thick, 9 × 7 cm2 Pt foil and monitors the resulting spatio-temporal temperature evolution using an IR camera. The power flux incident on the foil is calculated by solving the 2D+time heat diffusion equation, using the foil's calibrated thermal properties. An optimized, high frame rate IRVB, is quantitatively compared to results from a resistive bolometer on the bench using a modulated 405 nm laser beam with variable power density and square wave modulation from 0.2 Hz to 250 Hz. The design of the NSTX-U system and benchtop characterization are presented where signal-to-noise ratios are assessed using three different IR cameras: FLIR A655sc, FLIR A6751sc, and SBF-161. The sensitivity of the IRVB equipped with the SBF-161 camera is found to be high enough to measure radiation features in the NSTX-U lower divertor as estimated using SOLPS modeling. The optimized IRVB has a frame rate up to 50 Hz, high enough to distinguish radiation during edge-localized-modes (ELMs) from that between ELMs. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
