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

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.

Affiliation

Opachich YP; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Golick B; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Buscho JG; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Carpenter AC; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Funsten BT; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Garafalo AM; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Heinmiller J; Nevada National Security Sites, Livermore, California 94550, USA.
Dutra EC; Nevada National Security Sites, Livermore, California 94550, USA.
Knight R; Nevada National Security Sites, Livermore, California 94550, USA.
Max D; Nevada National Security Sites, Livermore, California 94550, USA.
Mayes DC; University of Texas at Austin, Austin, Texas 78712, USA.
Morioka SB; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Moy KJ; Nevada National Security Sites, Santa Barbara, California 93117, USA.
Nyholm PR; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Peterson AE; Nevada National Security Sites, Livermore, California 94550, USA.
Petre RB; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Posadas RS; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Sharp AM; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Tran V; Nevada National Security Sites, Livermore, California 94550, USA.
Trent SD; Nevada National Security Sites, Livermore, California 94550, USA.
Wallace MS; Nevada National Security Sites, Livermore, California 94550, USA.
Winget DE; University of Texas at Austin, Austin, Texas 78712, USA.
Perry TS; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Urbatsch TJ; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Heeter RF; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.

Rev Sci Instrum ; 95(8)2024 Aug 01.

Article in En | MEDLINE | ID: mdl-39101787

ABSTRACT

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 â¼2 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 â¼1.3 ns. We present the details of the diagnostic design along with recent characterization results of the IV2 sensors.

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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Rev Sci Instrum Year: 2024 Document type: Article Affiliation country: United States Country of publication: United States

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