Design and characterization of the time-resolved opacity spectrometer (OpSpecTR) for the NIF iron opacity campaign-Reference-Cited by-同舟云学术

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

Published:2024-08-01 Issue:8 Volume:95 Page:
ISSN:0034-6748
Container-title:Review of Scientific Instruments
language:en
Short-container-title:

Author:

Opachich Y. P.¹^ORCID,Golick B.¹^ORCID,Buscho J. G.¹,Carpenter A. C.¹,Funsten B. T.¹,Garafalo A. M.¹^ORCID,Heinmiller J.²^ORCID,Dutra E. C.²^ORCID,Knight R.²,Max D.²,Mayes D. C.³^ORCID,Morioka S. B.¹^ORCID,Moy K. J.⁴^ORCID,Nyholm P. R.¹^ORCID,Peterson A. E.²^ORCID,Petre R. B.¹,Posadas R. S.¹^ORCID,Sharp A. M.¹^ORCID,Tran V.²,Trent S. D.²,Wallace M. S.²^ORCID,Winget D. E.³^ORCID,Perry T. S.⁵^ORCID,Urbatsch T. J.⁵^ORCID,Heeter R. F.¹^ORCID

Affiliation:

1. Lawrence Livermore National Laboratory 1 , Livermore, California 94550, USA

2. Nevada National Security Sites 2 , Livermore, California 94550, USA

3. University of Texas at Austin 3 , Austin, Texas 78712, USA

4. Nevada National Security Sites 4 , Santa Barbara, California 93117, USA

5. Los Alamos National Laboratory 5 , Los Alamos, New Mexico 87545, USA

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.

Funder

U.S. Department of Energy

Publisher

AIP Publishing

Link

https://pubs.aip.org/aip/rsi/article-pdf/doi/10.1063/5.0218014/20094208/083513_1_5.0218014.pdf

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