Design and characterization of the time-resolved opacity spectrometer (OpSpecTR) for the NIF iron opacity campaign

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.; Trent, S. D.; Wallace, M. S.; Winget, D. E.; Perry, T. S.; Urbatsch, T. J.; Heeter, R. F.

doi:10.1063/5.0218014

Design and characterization of the time-resolved opacity spectrometer (OpSpecTR) for the NIF iron opacity campaign

Journal Article · Mon Aug 05 00:00:00 EDT 2024 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0218014· OSTI ID:2477791

^[1]; ^[1]; Buscho, J. G. ^[1]; Carpenter, A. C. ^[1]; Funsten, B. T. ^[1]; ^[1]; ^[2]; ^[2]; Knight, R. ^[2]; Max, D. ^[2]; ^[3]; ^[1]; ^[2]; ^[1]; ^[2]; Petre, R. B. ^[1]; ^[1]; ^[1]; Tran, V. ^[2]; Trent, S. D. ^[2] more »

Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Nevada National Security Site (NNSS), Livermore, CA (United States)
Univ. of Texas, Austin, TX (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

A new time-resolved opacity spectrometer (OpSpecTR) is currently under development for the National Ignition Facility (NIF) opacity campaign. Here, 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.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: 89233218CNA000001; AC52-07NA27344; NA0003624

OSTI ID:: 2477791

Alternate ID(s):: OSTI ID: 2440332
OSTI ID: 2565400

Report Number(s):: LA-UR--24-25992

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 8 Vol. 95; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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