1. Design and characterization of the time-resolved opacity spectrometer (OpSpecTR) for the NIF iron opacity campaign.
- Author
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Opachich, Y. P., Golick, B., Buscho, J. G., Carpenter, A. C., Funsten, B. T., Garafalo, A. M., Heinmiller, J., Dutra, E. C., Knight, R., Max, D., Mayes, D. C., Morioka, S. B., Moy, K. J., Nyholm, P. R., Peterson, A. E., Petre, R. B., Posadas, R. S., Sharp, A. M., Tran, V., and Trent, S. D.
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SPECTROMETERS ,ACQUISITION of data ,HIGH temperatures ,DETECTORS ,ABSORPTION - Abstract
A new time-resolved opacity spectrometer (OpSpecTR) is currently under development for the National Ignition Facility (NIF) opacity campaign. The spectrometer utilizes Icarus version 2 (IV2) hybridized complementary metal–oxide–semiconductor sensors to collect gated data at the time of the opacity transmission signal, unlocking the ability to collect higher-temperature measurements on NIF. Experimental conditions to achieve higher temperatures are feasible; however, backgrounds will dominate the data collected by the current time-integrating opacity spectrometer. The shortest available OpSpecTR integration time of ∼2 ns is predicted to reduce self-emission and other late-time backgrounds by up to 80%. Initially, three Icarus sensors will be used to collect data in the self-emission, backlighter, and absorption regions of the transmission spectrum, with plans to upgrade to five Daedalus sensors in future implementations with integration times of ∼1.3 ns. We present the details of the diagnostic design along with recent characterization results of the IV2 sensors. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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